Document and Entity Information (USD $)	9 Months Ended
Document and Entity Information (USD $)	Sep. 30, 2015	Oct. 30, 2015
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Trading Symbol	YHOO
Entity Registrant Name	YAHOO INC
Entity Central Index Key	0001011006
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Listing, Par Value Per Share	$ 0.001
Entity Common Stock, Shares Outstanding		944,355,144

Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 1,281,160	$ 2,664,098
Short-term marketable securities	4,600,889	5,327,412
Accounts receivable, net	980,301	1,032,704
Prepaid expenses and other current assets	733,723	673,504
Total current assets	7,596,073	9,697,718
Long-term marketable securities	940,052	2,230,892
Property and equipment, net	1,590,439	1,487,684
Goodwill	5,266,594	5,152,570
Intangible assets, net	397,181	470,842
Other long-term assets and investments	392,744	554,616
Investment in Alibaba Group	22,618,853	39,867,789
Investments in equity interests	2,333,063	2,489,578
Total assets	41,134,999	61,951,689
Current liabilities:
Accounts payable	262,588	238,018
Income taxes payable related to sale of Alibaba Group ADSs		3,282,293
Other accrued expenses and current liabilities	946,311	665,828
Deferred revenue	139,934	336,963
Total current liabilities	1,348,833	4,523,102
Convertible notes	1,217,408	1,170,423
Long-term deferred revenue	25,240	20,774
Other long-term liabilities	125,862	143,095
Deferred tax liabilities related to investment in Alibaba Group	9,126,655	16,154,906
Deferred and other long-term tax liabilities	1,011,928	1,153,797
Total liabilities	12,855,926	23,166,097
Commitments and contingencies (Note 12)
Yahoo! Inc. stockholders' equity:
Common stock, $0.001 par value; 5,000,000 shares authorized; 949,771 shares issued and 936,838 shares outstanding as of December 31, 2014 and 960,650 shares issued and 943,528 shares outstanding as of September 30, 2015	956	945
Additional paid-in capital	8,716,314	8,499,475
Treasury stock at cost, 12,933 shares as of December 31, 2014 and 17,122 shares as of September 30, 2015	(912,287)	(712,455)
Retained earnings	9,006,514	8,934,244
Accumulated other comprehensive income	11,434,453	22,019,628
Total Yahoo! Inc. stockholders' equity	28,245,950	38,741,837
Noncontrolling interests	33,123	43,755
Total equity	28,279,073	38,785,592
Total liabilities and equity	$ 41,134,999	$ 61,951,689

Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	5,000,000	5,000,000
Common stock, shares issued	960,650	949,771
Common stock, shares outstanding	943,528	936,838
Treasury stock at cost, shares	17,122	12,933

Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue	$ 1,225,673	$ 1,148,140	$ 3,694,908	$ 3,365,061
Operating expenses:
Cost of revenue - traffic acquisition costs	223,229	54,180	606,598	143,915
Cost of revenue - other	302,846	292,647	884,041	882,036
Sales and marketing	274,329	267,875	823,990	823,398
Product development	272,285	292,057	905,460	852,099
General and administrative	151,963	176,717	506,071	496,221
Amortization of intangibles	19,622	15,322	59,677	48,826
Gain on sales of patents		(1,300)	(11,100)	(62,800)
Asset impairment charge	41,699		41,699
Restructuring charges, net	26,012	8,470	96,932	70,578
Total operating expenses	1,311,985	1,105,968	3,913,368	3,254,273
Income (loss) from operations	(86,312)	42,172	(218,460)	110,788
Other income (expense), net	(23,955)	10,308,931	(66,759)	10,281,889
Income (loss) before income taxes and earnings in equity interests	(110,267)	10,351,103	(285,219)	10,392,677
(Provision) benefit for income taxes	93,208	(3,973,402)	75,613	(3,985,762)
Earnings in equity interests, net of tax	95,195	398,692	290,726	955,946
Net income	78,136	6,776,393	81,120	7,362,861
Net income attributable to noncontrolling interests	(1,875)	(2,291)	(5,215)	(7,474)
Net income attributable to Yahoo! Inc.	76,261	6,774,102	75,905	7,355,387
Net income attributable to Yahoo! Inc. common stockholders per share - basic	$ 0.08	$ 6.82	$ 0.08	$ 7.35
Net income attributable to Yahoo! Inc. common stockholders per share - diluted	$ 0.08	$ 6.70	$ 0.08	$ 7.18
Shares used in per share calculation - basic	940,822	993,543	937,713	1,001,066
Shares used in per share calculation - diluted	946,934	1,007,693	944,160	1,017,935
Stock-based compensation expense by function:
Stock-based compensation expense by function	110,426	105,796	351,252	317,422
Cost of revenue - other
Stock-based compensation expense by function:
Stock-based compensation expense by function	9,748	5,817	22,957	35,824
Sales and marketing
Stock-based compensation expense by function:
Stock-based compensation expense by function	33,317	31,661	111,416	113,568
Product development
Stock-based compensation expense by function:
Stock-based compensation expense by function	46,461	40,783	145,444	94,217
General and administrative
Stock-based compensation expense by function:
Stock-based compensation expense by function	20,900	27,535	71,435	73,813
Restructuring charges, net
Stock-based compensation expense by function:
Stock-based compensation expense by function			$ 2,705

Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net income	$ 78,136	$ 6,776,393	$ 81,120	$ 7,362,861
Available-for-sale securities:
Unrealized gains (losses) on available-for-sale securities, net of taxes of $(12,778,134) and $3,646,362 for the three months ended September 30, 2014 and 2015, respectively, and $(12,782,270) and $7,034,475 for the nine months ended September 30, 2014 and 2015, respectively	(5,299,758)	18,580,283	(10,225,842)	18,596,799
Reclassification adjustment for realized (gains) losses on available-for-sale securities included in net income, net of taxes of $1,231 and $(44) for the three months ended September 30, 2014 and 2015, respectively, and $1,304 and $(45) for the nine months ended September 30, 2014 and 2015, respectively	72	(2,044)	74	(2,165)
Net change in unrealized gains (losses) on available-for-sale securities, net of tax	(5,299,686)	18,578,239	(10,225,768)	18,594,634
Foreign currency translation adjustments ("CTA"):
Foreign CTA gains (losses), net of taxes of $(839) and $607 for the three months ended September 30, 2014 and 2015, respectively, and $1,431 and $1,061 for the nine months ended September 30, 2014 and 2015, respectively	(126,774)	(48,649)	(359,876)	(131,567)
Net investment hedge CTA gains (losses), net of taxes of $(44,951) and $8,252 for the three months ended September 30, 2014 and 2015, respectively, and $(29,389) and $(2,492) for the nine months ended September 30, 2014 and 2015, respectively	(13,855)	74,490	4,183	48,579
Reclassification adjustment for realized (gains) losses included in CTA, net of taxes of $30,325 for both the three and nine months ended September 30, 2014		(50,301)		(50,301)
Net foreign CTA gains (losses), net of tax	(140,629)	(24,460)	(355,693)	(133,289)
Cash flow hedges:
Unrealized gains (losses) on cash flow hedges, net of taxes of $(1,427) and $362 for the three months ended September 30, 2014 and 2015, respectively, and $(996) and $(327) for the nine months ended September 30, 2014 and 2015, respectively	(1,440)	2,799	(6,721)	909
Reclassification adjustment for realized (gains) losses on cash flow hedges included in net income, net of taxes of $661 and $274 for the three months ended September 30, 2014 and 2015, respectively, and $1,165 and $992 for the nine months ended September 30, 2014 and 2015, respectively	869	(854)	3,007	(1,594)
Net change in unrealized gains (losses) on cash flow hedges, net of tax	(571)	1,945	(3,714)	(685)
Other comprehensive income (loss)	(5,440,886)	18,555,724	(10,585,175)	18,460,660
Comprehensive income (loss)	(5,362,750)	25,332,117	(10,504,055)	25,823,521
Less: comprehensive income attributable to noncontrolling interests	(1,875)	(2,291)	(5,215)	(7,474)
Comprehensive income (loss) attributable to Yahoo! Inc.	$ (5,364,625)	$ 25,329,826	$ (10,509,270)	$ 25,816,047

Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Unrealized gains (losses) on available-for-sale securities, taxes	$ 3,646,362	$ (12,778,134)	$ 7,034,475	$ (12,782,270)
Reclassification adjustment for realized (gains) losses on available-for-sale securities included in net income, taxes	(44)	1,231	(45)	1,304
Foreign CTA gains (losses), taxes	607	(839)	1,061	1,431
Net investment hedge CTA gains (losses), taxes	8,252	(44,951)	(2,492)	(29,389)
Reclassification adjustment for realized (gains) losses included in CTA, taxes		30,325		30,325
Unrealized gains (losses) on cash flow hedges, taxes	362	(1,427)	(327)	(996)
Reclassification adjustment for realized (gains) losses on cash flow hedges included in net income, taxes	$ 274	$ 661	$ 992	$ 1,165

Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 81,120	$ 7,362,861
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation	355,540	356,577
Amortization of intangible assets	102,090	96,961
Accretion of convertible notes discount	46,984	44,583
Stock-based compensation expense	353,957	317,422
Non-cash asset impairment charge	41,699
Non-cash restructuring reversals	(31)	(7,031)
Loss from sales of investments, assets, and other, net	45,607	27,850
Gain on sale of Alibaba Group ADSs		(10,319,437)
Gain on sales of patents	(11,100)	(62,800)
Loss on Hortonworks warrants	19,241
Earnings in equity interests	(290,726)	(955,946)
Tax benefits (detriments) from stock-based awards	22,990	111,062
Excess tax benefits from stock-based awards	(33,359)	(114,392)
Deferred income taxes	(52,605)	397,415
Dividends received from equity investees	142,045	83,685
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	34,303	142,648
Prepaid expenses and other assets	(64,112)	21,058
Accounts payable	(29,642)	(310)
Accrued expenses and other liabilities	218,037	120,018
Incomes taxes payable related to sale of Alibaba Group ADSs	(3,282,293)	3,282,293
Deferred revenue	(191,989)	(118,850)
Net cash provided by (used in) operating activities	(2,492,244)	785,667
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property and equipment	(451,813)	(319,275)
Proceeds from sales of property and equipment	11,069	15,008
Purchases of marketable securities	(3,472,587)	(1,562,588)
Proceeds from sales of marketable securities	566,321	1,681,735
Proceeds from maturities of marketable securities	4,889,437	868,956
Proceeds from sale of Alibaba Group ADSs, net of underwriting discounts, commissions, and fees		9,404,974
Acquisitions, net of cash acquired	(174,630)	(313,837)
Proceeds from sales of patents	29,100	62,800
Purchases of intangible assets	(4,733)	(2,480)
Proceeds from settlement of derivative hedge contracts	120,682	186,079
Payments for settlement of derivative hedge contracts	(6,594)	(5,218)
Payments for equity investments in privately held companies		(60,399)
Other investing activities, net	(203)	1,239
Net cash provided by investing activities	1,506,049	9,956,994
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock	52,297	247,568
Repurchases of common stock	(203,771)	(2,550,232)
Excess tax benefits from stock-based awards	33,359	114,392
Tax withholdings related to net share settlements of restricted stock units	(216,061)	(226,425)
Distributions to noncontrolling interests	(15,847)	(22,344)
Other financing activities, net	(13,554)	(9,240)
Net cash used in financing activities	(363,577)	(2,446,281)
Effect of exchange rate changes on cash and cash equivalents	(33,166)	(28,685)
Net change in cash and cash equivalents	(1,382,938)	8,267,695
Cash and cash equivalents at beginning of period	2,664,098	2,077,590
Cash and cash equivalents at end of period	$ 1,281,160	$ 10,345,285

The Company And Summary Of Significant Accounting Policies

9 Months Ended

Sep. 30, 2015

The Company And Summary Of Significant Accounting Policies

Note 1 The Company And Summary Of Significant Accounting Policies

The Company. Yahoo! Inc., together with its consolidated subsidiaries (“Yahoo” or the “Company”), is a guide focused on informing, connecting, and entertaining its users. By creating highly personalized experiences for its users, the Company keeps people connected to what matters most to them, across devices and around the world. In turn, the Company creates value for advertisers by connecting them with the audiences that build their businesses. For advertisers, the opportunity to be a part of users’ digital habits across products and platforms is a powerful tool to engage audiences and build brand loyalty. Advertisers can build their businesses by advertising to targeted audiences on the Company’s online properties and services (“Yahoo Properties”) and through a distribution network of third-party entities (“Affiliates”) who integrate the Company’s advertising offerings into their websites or other offerings (“Affiliate sites”). The Company manages and measures its business geographically, principally in the Americas, EMEA (Europe, Middle East, and Africa) and Asia Pacific.

Basis of Presentation. The condensed consolidated financial statements include the accounts of Yahoo! Inc. and its majority-owned or otherwise controlled subsidiaries. All intercompany accounts and transactions have been eliminated. Investments in entities in which the Company can exercise significant influence, but does not own a majority equity interest or otherwise control, are accounted for using the equity method and are included as investments in equity interests on the condensed consolidated balance sheets. The Company has included the results of operations of acquired companies from the date of the acquisition. At the beginning of 2015, the Company began classifying editorial costs as cost of revenue — other rather than including such costs in sales and marketing expense. To conform to the current period presentation, the Company reclassified $26 million and $63 million, respectively, in certain website editorial costs previously included in sales and marketing expense to cost of revenue — other for the three and nine months ended September 30, 2014. Also, at the beginning of 2015, the Company began classifying non-data center facilities-related costs within general and administrative expense. To conform to the current period presentation, the Company reclassified $14 million and $39 million, respectively, in facilities-related costs previously included in product development expense and $16 million and $46 million, respectively, previously included in sales and marketing expense to general and administrative expense for the three and nine months ended September 30, 2014.

During the six months ended June 30, 2015, the Company identified measurement period adjustments of $11 million to previous purchase accounting estimates for acquisitions, which were primarily related to the finalization of tax and other adjustments. These adjustments were immaterial and applied retrospectively to the acquisition dates. Accordingly, the Company’s condensed consolidated balance sheet as of December 31, 2014 has been updated to reflect the effects of the measurement period adjustments.

The accompanying unaudited condensed consolidated interim financial statements reflect all adjustments, consisting of only normal recurring items, which, in the opinion of management, are necessary for a fair statement of the results of operations for the periods shown. The results of operations for such periods are not necessarily indicative of the results expected for the full year or for any future periods.

The preparation of consolidated financial statements in conformity with generally accepted accounting principles (“GAAP”) in the United States (“U.S.”) requires management to make estimates, judgments, and assumptions that affect the reported amounts of assets, liabilities, revenue, and expenses and the related disclosure of contingent assets and liabilities. On an ongoing basis, the Company evaluates its estimates, including those related to revenue, the useful lives of long-lived assets including property and equipment and intangible assets, investment fair values, originally developed content, acquired content, stock-based compensation, goodwill, income taxes, contingencies, and restructuring charges. The Company bases its estimates of the carrying value of certain assets and liabilities on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, when these carrying values are not readily available from other sources. Actual results may differ from these estimates.

These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014, as amended. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted. The condensed consolidated balance sheet as of December 31, 2014 was derived from the Company’s audited financial statements for the year ended December 31, 2014, but does not include all disclosures required by U.S. GAAP. However, the Company believes the disclosures are adequate to make the information presented not misleading.

Cost of Revenue — TAC. Traffic acquisition costs (“TAC”) consists of payments made to Affiliates and payments made to companies that direct consumer and business traffic to Yahoo Properties. TAC is either recorded as a reduction of revenue or as cost of revenue—TAC. TAC related to the Company’s Search and Advertising Sales Agreement (as amended, the “Search Agreement”) with Microsoft Corporation (“Microsoft”) is recorded as a reduction of revenue. See Note 17 — “Search Agreement With Microsoft Corporation” for a description of the Search Agreement and License Agreement with Microsoft. The Company also has an agreement to compensate a third party, Mozilla Corporation (“Mozilla”), to make the Company the default search provider on certain of Mozilla’s products in the United States. The Company records these payments as cost of revenue – TAC.

Originally Developed Content and Acquired Content. Originally developed content and acquired content are both carried at cost. Originally developed content is amortized based on the expected pattern of viewing, typically over 18 months. Acquired content is amortized on a straight-line basis over the shorter of each program’s contractual window of availability or estimated period of use, beginning with the month of first availability. Marketing and general and administrative costs are expensed as incurred.

For originally developed content, the Company performs regular recoverability assessments on a program-by-program basis. If there are any events or changes in circumstances indicating that the Company should assess whether the fair value of originally developed content is less than its unamortized costs, the Company performs a fair value analysis using an expected cash flow approach. The amount by which the unamortized costs of the originally developed content exceed estimated fair value is charged to expense as an asset impairment. During the three and nine months ended September 30, 2015, the Company recorded an asset impairment charge of $17 million related to originally developed content.

For acquired content, the Company compares the net realizable value on a program-by-program basis with the unamortized cost. The amount by which the unamortized costs of the acquired content exceed net realizable value is charged to expense as an asset impairment. During the three and nine months ended September 30, 2015, the Company recorded an asset impairment charge of $25 million related to acquired content, primarily driven by a reduction of forecasted revenues to be generated from advertising on Yahoo Properties.

Recent Accounting Pronouncements. In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2014-09, “Revenue from Contracts with Customers,” which supersedes the revenue recognition requirements in Topic 605, “Revenue Recognition” and requires entities to recognize revenue in a way that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In August 2015, the FASB issued ASU 2015-14, which defers by one year the effective date of ASU 2014-09. Accordingly, this guidance is effective for interim and annual periods beginning after December 15, 2017 with early adoption permitted for interim and annual periods beginning after December 15, 2016. The Company plans to adopt this guidance on January 1, 2018. The Company is currently evaluating the effects, if any, that the adoption of this guidance will have on the Company’s financial position, results of operations and cash flows.

In September 2015, the FASB issued ASU 2015-16, “Business Combinations,” which simplifies the accounting for measurement-period adjustments by eliminating the requirement to restate prior period financial statements for measurement period adjustments. The new guidance requires the cumulative impact of measurement period adjustments, including the impact on prior periods, to be recognized in the reporting period in which the adjustment is identified. The ASU is effective for public companies for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption is permitted for any interim and annual financial statements that have not yet been issued. The Company evaluated the effects of the ASU 2015-16 and elected to early adopt the ASU for the three months ended September 30, 2015. The ASU will be applied prospectively to the acquisitions which require adjustments to the provisional amounts that occurred during the open measurement periods, regardless of the acquisition date.

Marketable Securities, Investments And Fair Value Disclosures

9 Months Ended

Sep. 30, 2015

Marketable Securities, Investments And Fair Value Disclosures

Note 2 Marketable Securities, Investments And Fair Value Disclosures

The following tables summarize the available-for-sale marketable securities (in thousands):


	December 31, 2014
	Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value

Government and agency securities	$	850,712	$	82	$	(792)	$	850,002
Corporate debt securities, commercial paper, time deposits, and bank certificates of deposit		6,711,683		612		(4,653)		6,707,642
Alibaba Group equity securities		2,713,484		37,154,305		-		39,867,789
Hortonworks equity securities		26,246		77,783		-		104,029
Other corporate equity securities		230		430		-		660

Total available-for-sale marketable securities	$	10,302,355	$	37,233,212	$	(5,445)	$	47,530,122


	September 30, 2015
	Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value

Government and agency securities	$	781,223	$	453	$	(31)	$	781,645
Corporate debt securities, commercial paper, time deposits, and bank certificates of deposit		4,759,194		1,616		(1,514)		4,759,296
Alibaba Group equity securities		2,713,484		19,905,369		-		22,618,853
Hortonworks equity securities		26,246		57,939		-		84,185
Other corporate equity securities		230		218		-		448

Total available-for-sale marketable securities	$	8,280,377	$	19,965,595	$	(1,545)	$	28,244,427


	December 31,		September 30,
	2014		2015

Reported as:
Short-term marketable securities		5,327,412		4,600,889
Long-term marketable securities		2,230,892		940,052
Investment in Alibaba Group		39,867,789		22,618,853
Other long-term assets and investments		104,029		84,633

Total	$	47,530,122	$	28,244,427

Short-term, highly liquid investments of $2.0 billion and $286 million as of December 31, 2014 and September 30, 2015, respectively, included in cash and cash equivalents on the condensed consolidated balance sheets are not included in the table above as the gross unrealized gains and losses were not material as the carrying value approximates estimated fair value because of the short maturity of those instruments. Realized gains and losses from sales of available-for-sale marketable debt securities were not material for both the three and nine months ended September 30, 2014 and 2015.

The remaining contractual maturities of available-for-sale marketable debt securities were as follows (in thousands):


	December 31,		September 30,
	2014		2015

Due within one year	$	5,327,412	$	4,600,889
Due after one year through five years		2,230,892		940,052

Total available-for-sale marketable debt securities	$	7,558,304	$	5,540,941

The following tables show all available-for-sale marketable debt securities in an unrealized loss position for which an other-than-temporary impairment has not been recognized and the related gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position (in thousands):


	December 31, 2014
	Less than 12 Months				12 Months or Longer				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Loss		Value		Loss		Value		Loss

Government and agency securities	$	744,948	$	(792)	$	-	$	-	$	744,948	$	(792)
Corporate debt securities, commercial paper, and bank certificates of deposit		2,601,288		(4,646)		3,234		(7)		2,604,522		(4,653)

Total available-for-sale marketable debt securities	$	3,346,236	$	(5,438)	$	3,234	$	(7)	$	3,349,470	$	(5,445)


	September 30, 2015
	Less than 12 Months				12 Months or Longer				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Loss		Value		Loss		Value		Loss

Government and agency securities	$	67,270	$	(31)	$	-	$	-	$	67,270	$	(31)
Corporate debt securities, commercial paper, and bank certificates of deposit		1,497,672		(1,513)		2,899		(1)		1,500,571		(1,514)

Total available-for-sale marketable debt securities	$	1,564,942	$	(1,544)	$	2,899	$	(1)	$	1,567,841	$	(1,545)

The Company’s investment portfolio includes equity securities of Alibaba Group and Hortonworks, Inc. (“Hortonworks”), as well as liquid high-quality fixed income debt securities including government, agency and corporate debt, money market funds, commercial paper, certificates of deposit and time deposits with financial institutions. The fair value of any debt or equity security will vary over time and is subject to a variety of market risks including: macro-economic, regulatory, industry, company performance, and systemic risks of the equity markets overall. Consequently, the carrying value of the Company’s investment portfolio will vary over time as the value of its investment changes.

Investments in both fixed rate and floating rate interest earning instruments carry a degree of interest rate risk. Fixed rate securities may have their fair value adversely impacted due to a rise in interest rates, while floating rate securities may produce less income than expected if interest rates fall. Fixed income securities may have their fair value adversely impacted due to a deterioration of the credit quality of the issuer. The longer the term of the securities, the more susceptible they are to changes in market rates.

Available-for-sale marketable debt securities are reviewed periodically to identify possible other-than-temporary impairment. The Company has no current requirement or intent to sell the securities in an unrealized loss position. The Company expects to recover up to (or beyond) the initial cost of investment for securities held.

The following table sets forth the financial assets and liabilities, measured at fair value, by level within the fair value hierarchy as of December 31, 2014 (in thousands):


	Fair Value Measurements at Reporting Date Using
Assets	Level 1		Level 2		Level 3		Total

Money market funds⁽¹⁾	$	373,822	$	-	$	-	$	373,822
Available-for-sale marketable debt securities:
Government and agency securities⁽¹⁾		-		850,002		-		850,002
Commercial paper and bank certificates of deposit⁽¹⁾		-		3,602,321		-		3,602,321
Corporate debt securities⁽¹⁾		-		3,327,017		-		3,327,017
Time deposits⁽¹⁾		-		1,361,165		-		1,361,165
Available-for-sale equity securities:
Other corporate equity securities⁽²⁾		660		-		-		660
Alibaba Group equity securities		39,867,789		-		-		39,867,789
Hortonworks equity securities⁽²⁾		104,029		-		-		104,029
Hortonworks warrants		-		-		98,062		98,062
Foreign currency derivative contracts⁽³⁾		-		202,928		-		202,928

Financial assets at fair value	$	40,346,300	$	9,343,433	$	98,062	$	49,787,795
Liabilities
Foreign currency derivative contracts⁽³⁾		-		(6,157)		-		(6,157)

Total financial assets and liabilities at fair value	$	40,346,300	$	9,337,276	$	98,062	$	49,781,638

The following table sets forth the financial assets and liabilities, measured at fair value, by level within the fair value hierarchy as of September 30, 2015 (in thousands):


	Fair Value Measurements at Reporting Date Using
Assets	Level 1		Level 2		Level 3		Total

Money market funds⁽¹⁾	$	177,280	$	-	$	-	$	177,280
Available-for-sale marketable debt securities:
Government and agency securities⁽¹⁾		-		781,645		-		781,645
Commercial paper and bank certificates of deposit⁽¹⁾		-		1,835,483		-		1,835,483
Corporate debt securities⁽¹⁾		-		2,973,809		-		2,973,809
Time deposits⁽¹⁾		-		58,420		-		58,420
Available-for-sale equity securities:
Other corporate equity securities ⁽²⁾		448		-		-		448
Alibaba Group equity securities		22,618,853		-		-		22,618,853
Hortonworks equity securities⁽²⁾		84,185		-		-		84,185
Hortonworks warrants		-		-		78,820		78,820
Foreign currency derivative contracts⁽³⁾		-		111,080		-		111,080

Financial assets at fair value	$	22,880,766	$	5,760,437	$	78,820	$	28,720,023
Liabilities
Foreign currency derivative contracts⁽³⁾		-		(10,287)		-		(10,287)

Total financial assets and liabilities at fair value	$	22,880,766	$	5,750,150	$	78,820	$	28,709,736

(1) The money market funds, government and agency securities, commercial paper and bank certificates of deposit, corporate debt securities, and time deposits are classified as part of either cash and cash equivalents or short or long-term marketable securities on the condensed consolidated balance sheets.

(2) The Hortonworks equity securities and other corporate equity securities are classified as part of other long-term assets and investments on the condensed consolidated balance sheets.

(3) Foreign currency derivative contracts are classified as part of either other current or noncurrent assets or liabilities on the condensed consolidated balance sheets. The notional amounts of the foreign currency derivative contracts were: $2.1 billion, including contracts designated as net investment hedges of $1.6 billion, as of December 31, 2014; and $1.9 billion, including contracts designated as net investment hedges of $1.5 billion, as of September 30, 2015.

The amount of cash and cash equivalents as of December 31, 2014 and September 30, 2015 included $702 million and $995 million, respectively, in cash.

The fair values of the Company’s Level 1 financial assets and liabilities are based on quoted prices in active markets for identical assets or liabilities. The fair values of the Company’s Level 2 financial assets and liabilities are obtained using quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets in markets that are not active; and inputs other than quoted prices (e.g., interest rates and yield curves). The Company utilizes a pricing service to assist in obtaining fair value pricing for the marketable debt securities. The fair value of this Level 3 financial asset was determined using a Black-Scholes model.

Activity between Levels of the Fair Value Hierarchy

During the year ended December 31, 2014 and the nine months ended September 30, 2015, the Company did not make any transfers between Level 1, Level 2, and Level 3 assets or liabilities.

Hortonworks Warrants

The estimated fair value of the Hortonworks warrants was $98 million and $79 million as of December 31, 2014 and September 30, 2015, respectively, which is included in other long-term assets and investments on the condensed consolidated balance sheets. During the three and nine months ended September 30, 2015, the Company recorded a loss of $13 million and $19 million, respectively, due to the change in estimated fair value of the Hortonworks warrants during the respective periods, which was included within other income (expense), net in the Company’s condensed consolidated statements of operations. The estimated fair value of the Hortonworks warrants was determined using a Black-Scholes model.

Assets and Liabilities at Fair Value on a Nonrecurring Basis

Convertible Senior Notes. In 2013, the Company issued $1.4375 billion aggregate principal amount of 0.00% Convertible Senior Notes due 2018 (the “Notes”). The Notes are carried at their original issuance value, net of unamortized debt discount, and are not marked to market each period. The approximate estimated fair value of the Notes as of both December 31, 2014 and September 30, 2015 was $1.2 billion. The estimated fair value of the Notes was determined on the basis of quoted market prices observable in the market and is considered Level 2 in the fair value hierarchy. See Note 11 — “Convertible Notes” for additional information related to the Notes.

Other Investments. As of December 31, 2014 and September 30, 2015, the Company held approximately $82 million and $83 million, respectively, of investments in equity securities of privately-held companies that are accounted for using the cost method. These investments are included within other long-term assets and investments on the condensed consolidated balance sheets. Such investments are reviewed periodically for impairment.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References+ Details

Consolidated Financial Statement Details

9 Months Ended

Sep. 30, 2015

Consolidated Financial Statement Details

Note 3 Consolidated Financial Statement Details

Accumulated Other Comprehensive Income

The components of accumulated other comprehensive income were as follows (in thousands):


	December 31,		September 30,
	2014		2015

Unrealized gains on available-for-sale securities, net of tax	$	22,084,960	$	11,859,192
Unrealized gains (losses) on cash flow hedges, net of tax		1,856		(1,858)
Foreign currency translation, net of tax		(67,188)		(422,881)

Accumulated other comprehensive income	$	22,019,628	$	11,434,453

Noncontrolling Interests

Noncontrolling interests were as follows (in thousands):


	December 31,		September 30,
	2014		2015

Beginning noncontrolling interests	$	55,688	$	43,755
Distributions to noncontrolling interests		(22,344)		(15,847)
Net income attributable to noncontrolling interests		10,411		5,215

Ending noncontrolling interests	$	43,755	$	33,123

Other Income (Expense), Net

Other income (expense), net was as follows (in thousands):


	Three Months Ended				Nine Months Ended
	September 30,		September 30,		September 30,		September 30,
	2014		2015		2014		2015

Interest, dividend and investment income	$	5,148	$	8,010	$	16,180	$	24,888
Interest expense		(17,292)		(18,411)		(51,461)		(53,540)
Gain on sale of Alibaba Group ADSs		10,319,437		-		10,319,437		-
Loss on Hortonworks warrants		-		(12,782)		-		(19,241)
Foreign exchange losses		(2,109)		(1,490)		(9,048)		(21,017)
Other		3,747		718		6,781		2,151

Total other income (expense), net	$	10,308,931	$	(23,955)	$	10,281,889	$	(66,759)

Interest, dividend and investment income consists of income earned from cash and cash equivalents in bank accounts and investments made in marketable debt securities.

Interest expense is related to the Notes and notes payable related to building and capital lease obligations for data centers.

Gain on sale of Alibaba Group ADSs during the three and nine months ended September 30, 2014 is attributable to the pre-tax gain related to the sale of 140 million American Depositary Shares (“ADSs”) of Alibaba Group in the Alibaba Group IPO on September 24, 2014.

During the three and nine months ended September 30, 2015, the Company recorded losses of $13 million and $19 million, respectively, due to the change in estimated fair value of the Hortonworks warrants during the respective periods, which was included within other income (expense), net in the condensed consolidated statements of operations.

Foreign exchange losses consists of foreign exchange gains and losses due to re-measurement of monetary assets and liabilities denominated in non-functional currencies, and unrealized and realized foreign currency transaction gains and losses, including gains and losses related to balance sheet hedges.

Reclassifications Out of Accumulated Other Comprehensive Income

Reclassifications out of accumulated other comprehensive income for the three months ended September 30, 2014 and 2015 were as follows (in thousands):


	Three Months Ended
	September 30,		September 30,
	2014		2015
	Reclassified from		Reclassified from
	Accumulated		Accumulated
	Other		Other
	Comprehensive		Comprehensive		Affected Line Item in the
	Income		Income		Statement of Operations

Realized (gains) losses on cash flow hedges, net of tax	$	(854)	$	869	Revenue
Realized (gains) losses on available-for-sale securities, net of tax		(2,044)		72	Other income (expense), net
Foreign currency translation adjustments (“CTA”):
Disposal of a portion of the investment in Alibaba Group, net of $30 million in tax		(50,301)		-	Other income (expense), net

Total reclassifications for the period	$	(53,199)	$	941



Reclassifications out of accumulated other comprehensive income for the nine months ended September 30, 2014 and 2015 were as follows (in thousands):
	Nine Months Ended
	September 30,		September 30,
	2014		2015
	Reclassified from		Reclassified from
	Accumulated		Accumulated
	Other		Other
	Comprehensive		Comprehensive		Affected Line Item in the
	Income		Income		Statement of Operations

Realized (gains) losses on cash flow hedges, net of tax	$	(1,594)	$	3,007	Revenue
Realized (gains) losses on available-for-sale securities, net of tax		(2,165)		74	Other income (expense), net
Foreign currency translation adjustments (“CTA”):
Disposal of a portion of the investment in Alibaba Group, net of $30 million in tax		(50,301)		-	Other income (expense), net

Total reclassifications for the period	$	(54,060)	$	3,081

Acquisitions and Dispositions

9 Months Ended

Sep. 30, 2015

Acquisitions and Dispositions

Note 4 Acquisitions and Dispositions

Transactions Completed in 2014.

Flurry Acquisition — On August 25, 2014, the Company completed the acquisition of Flurry, Inc. (“Flurry”), a mobile data analytics company that optimizes mobile experiences for developers, marketers, and consumers. The combined scale of Yahoo and Flurry created more personalized and inspiring app experiences for users and enabled more effective mobile advertising solutions for brands seeking to reach their audiences and gain cross-device insights.

The total purchase price of approximately $270 million consisted of cash consideration. Under the terms of the agreement, the Company acquired all of the equity interests (including all outstanding vested options) of Flurry. Outstanding Flurry unvested options were assumed and converted into equivalent awards for Yahoo common stock valued at $4 million, which is being recognized as stock-based compensation expense as the options vest over periods of up to four years.

In connection with the acquisition, the Company issued restricted stock units valued at $23 million, which are being recognized as stock-based compensation expense as the restricted stock units vest over four years.

The allocation of the purchase price of the assets acquired and liabilities assumed based on their estimated fair values was as follows (in thousands):




Cash acquired	$	12,139
Other tangible assets acquired		51,235
Amortizable intangible assets:
Developed technology		7,100
Customer contracts and related relationships		47,600
Other		720
Goodwill		194,081

Total assets acquired		312,875
Liabilities assumed		(43,205)

Total	$	269,670

The amortizable intangible assets have useful lives not exceeding five years and a weighted average useful life of five years. The purchase price exceeded the estimated fair value of the tangible and identifiable intangible assets and liabilities acquired and, as a result of the allocation, the Company recorded goodwill of $194 million in connection with this transaction. Goodwill represents the excess of the purchase price over the estimated fair value of the net tangible and identifiable intangible assets acquired and is not deductible for tax purposes.

Other Acquisitions — Business Combinations. During the nine months ended September 30, 2014, the Company acquired eight other companies, all of which were accounted for as business combinations. The total purchase price for these acquisitions was $60 million less cash acquired of $4 million, which resulted in a net cash outlay of $56 million. The purchase price for the assets and liabilities assumed was allocated based on their estimated fair values as follows: $17 million to amortizable intangible assets, $4 million to cash acquired, $10 million to other tangible assets, $5 million to assumed liabilities; and the remainder of $34 million to goodwill. Goodwill represents the excess of the purchase price over the estimated fair value of the net tangible and identifiable intangible assets acquired and is not deductible for tax purposes.

Transactions Completed in 2015.

Polyvore Acquisition — On September 2, 2015, the Company acquired Polyvore, Inc. (“Polyvore”), a social commerce website that lets users across the globe discover and shop for their favorite products in fashion, beauty and home décor.

The total purchase price of approximately $161 million consisted of cash consideration. Under the terms of the agreement, the Company acquired all of the equity interests (including all outstanding vested options) of Polyvore. Outstanding Polyvore unvested options were assumed and converted into equivalent awards for Yahoo common stock valued at $7 million, which is being recognized as stock-based compensation expense as the options vest over periods of up to four years.

In connection with the acquisition, the Company is also recognizing stock-based compensation expense of $15 million over a period of four years. This amount is comprised of Yahoo common stock issued to the founders (which had a fair value of $15 million at the acquisition date). The Yahoo common stock issued to the founders is subject to forfeiture and will be released over four years provided they remain employees of the Company.

The preliminary allocation of the purchase price of the assets acquired and liabilities assumed based on their estimated fair values was as follows (in thousands):




Cash acquired	$	5,923
Other tangible assets acquired		12,057
Amortizable intangible assets:
Developed technology		17,550
Tradename		1,150
Customer contracts and related relationships		225
Goodwill		131,180

Total assets acquired		168,085
Liabilities assumed		(7,503)

Total	$	160,582

The amortizable intangible assets have useful lives not exceeding five years and a weighted average useful life of three years. The purchase price of $161 million exceeded the estimated fair value of the tangible and identifiable intangible assets and liabilities acquired and, as a result of the preliminary allocation, the Company recorded goodwill of $131 million in connection with this transaction. Goodwill represents the excess of the purchase price over the estimated fair value of the net tangible and identifiable intangible assets acquired and is not deductible for tax purposes. The entire preliminary goodwill amount was recorded in the Americas segment.

Other Acquisitions — During the nine months ended September 30, 2015, the Company acquired one other company which was accounted for as a business combination. The total purchase price for this acquisition was $23 million. The preliminary purchase price allocation of the assets acquired and liabilities assumed based on their estimated fair values was as follows: $5 million to amortizable intangibles; $2 million to net liabilities assumed; and the remainder of $20 million to goodwill. Goodwill represents the excess of the purchase price over the estimated fair value of the net tangible and identifiable intangible assets acquired and is not deductible for tax purposes.

The Company’s business combinations completed during the nine months ended September 30, 2014 and 2015 did not have a material impact on the Company’s condensed consolidated financial statements and therefore actual and proforma disclosures have not been presented.

Patent Sale and License Agreement. During 2014, the Company entered into a patent sale and license agreement for total cash consideration of $460 million. The total consideration was allocated based on the estimated relative fair value of each of the elements of the agreement: $61 million was allocated to the sale of patents (“Sold Patents”), $135 million to the license of existing patents (“Existing Patents”) and $264 million to the license of patents developed or acquired in the next five years (“Capture Period Patents”). The Company recorded $60 million as a gain on the Sold Patents during the three months ended June 30, 2014 and the remaining $1 million gain on the Sold Patents was recorded in the three months ended September 30, 2014 when the payment was due. The amounts allocated to the license of the Existing Patents are being recorded as revenue over the four-year payment period under the license when payments are due. The amounts allocated to the Capture Period Patents are being recorded as revenue over the five-year capture period. The Company recognized $22 million in revenue related to the Existing Patents and the Capture Period Patents during the three and nine months ended September 30, 2014. During the three and nine months ended September 30, 2015, the Company recognized $22 million and $65 million, respectively, in revenue associated with the patent sale and license agreement.

During the three and nine months ended September 30, 2014, the Company sold certain patents and recorded a gain on sales of patents of approximately $1 million and $63 million, respectively. During the three months ended September 30, 2015, the Company did not have any patent sales. During the nine months ended September 30, 2015, the Company sold certain patents and recorded a gain on sales of patents of approximately $11 million.

Goodwill

9 Months Ended

Sep. 30, 2015

Goodwill

Note 5 Goodwill

The changes in the carrying amount of goodwill for the nine months ended September 30, 2015 were as follows (in thousands):


	Americas⁽¹⁾		EMEA⁽²⁾		Asia Pacific⁽³⁾		Total

Net balance as of January 1, 2015	$	4,322,219	$	532,469	$	297,882	$	5,152,570
Acquisitions and related adjustments		130,303		20,312		-		150,615
Foreign currency translation adjustments		(2,803)		(25,873)		(7,915)		(36,591)

Net balance as of September 30, 2015	$	4,449,719	$	526,908	$	289,967	$	5,266,594

(1)	Gross goodwill balance for the Americas segment was $4.4 billion as of September 30, 2015.

(2)	Gross goodwill balance for the EMEA segment was $1.2 billion as of September 30, 2015. The EMEA segment includes accumulated impairment losses of $630 million as of September 30, 2015.

(3)	Gross goodwill balance for the Asia Pacific segment was $449 million as of September 30, 2015. The Asia Pacific segment includes accumulated impairment losses of $159 million as of September 30, 2015.

Intangible Assets, Net

9 Months Ended

Sep. 30, 2015

Intangible Assets, Net

Note 6 Intangible Assets, Net

The following table summarizes the Company’s intangible assets, net (in thousands):


	December 31, 2014		September 30, 2015

	Net		Gross Carrying Amount		Accumulated Amortization^(*)		Net

Customer, affiliate, and advertiser related relationships	$	281,596	$	370,314	$	(133,107)	$	237,207
Developed technology and patents		122,674		209,385		(107,981)		101,404
Tradenames, trademarks, and domain names		66,572		109,089		(50,519)		58,570

Total intangible assets, net	$	470,842	$	688,788	$	(291,607)	$	397,181

(*)	Cumulative foreign currency translation adjustments, reflecting movement in the currencies of the underlying entities, totaled approximately $17 million as of September 30, 2015.

For the three months ended September 30, 2014 and 2015, the Company recognized amortization expense for intangible assets of $32 million and $34 million, respectively, including $17 million and $14 million in cost of revenue — other for the three months ended September 30, 2014 and 2015, respectively. For the nine months ended September 30, 2014 and 2015, the Company recognized amortization expense for intangible assets of $97 million and $102 million, respectively, including $48 million and $42 million in cost of revenue — other for the nine months ended September 30, 2014 and 2015, respectively. Based on the current amount of intangibles subject to amortization, the estimated amortization expense for the remainder of 2015 and each of the succeeding years is as follows: three months ending December 31, 2015: $33 million; 2016: $114 million; 2017: $105 million; 2018: $85 million; 2019: $44 million; and cumulatively thereafter: $1 million.

Basic And Diluted Net Income Attributable To Yahoo! Inc. Common Stockholders Per Share

9 Months Ended

Sep. 30, 2015

Basic And Diluted Net Income Attributable To Yahoo! Inc. Common Stockholders Per Share

Note 7 Basic And Diluted Net Income Attributable To Yahoo! Inc. Common Stockholders Per Share

Basic and diluted net income attributable to Yahoo! Inc. common stockholders per share is computed using the weighted average number of common shares outstanding during the period, excluding net income attributable to participating securities (restricted stock units granted under the Directors’ Stock Plan (the “Directors’ Plan”)). Diluted net income per share is computed using the weighted average number of common shares and, if dilutive, potential common shares outstanding during the period. Potential common shares are calculated using the treasury stock method and consist of unvested restricted stock and shares underlying unvested restricted stock units and the incremental common shares issuable upon the exercise of stock options. The Company calculates potential tax windfalls and shortfalls by including the impact of pro forma deferred tax assets.

The Company takes into account the effect on consolidated net income per share of dilutive securities of entities in which the Company holds equity interests that are accounted for using the equity method.

Potentially dilutive securities representing approximately 1 million and 3 million shares of common stock for the three and nine months ended September 30, 2014, respectively, and 14 million and 6 million shares of common stock for the three and nine months ended September 30, 2015, respectively, were excluded from the computation of diluted earnings per share for these periods because their effect would have been anti-dilutive.

The Company has the option to pay cash, issue shares of common stock or any combination thereof for the aggregate amount due upon conversion of the Notes. The Company’s intent is to settle the principal amount of the Notes in cash upon conversion. As a result, upon conversion of the Notes, only the amounts payable in excess of the principal amounts of the Notes are considered in diluted earnings per share under the treasury stock method.

The denominator for diluted net income per share does not include any effect from the note hedges. In future periods, the denominator for diluted net income per share will exclude any effect of the note hedges, if their effect would be anti-dilutive. In the event an actual conversion of any or all of the Notes occurs, the shares that would be delivered to the Company under the note hedges are designed to neutralize the dilutive effect of the shares that the Company would issue under the Notes. See Note 11 — “Convertible Notes” for additional information.

The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share amounts):


	Three Months Ended				Nine Months Ended
	September 30,		September 30,		September 30,		September 30,
	2014		2015		2014		2015

*Basic:*
Numerator:
Net income attributable to Yahoo! Inc.	$	6,774,102	$	76,261	$	7,355,387	$	75,905
Less: Net income allocated to participating securities		(61)		-		(66)		-

Net income attributable to Yahoo! Inc. common stockholders — basic	$	6,774,041	$	76,261	$	7,355,321	$	75,905

Denominator:
Weighted average common shares		993,543		940,822		1,001,066		937,713

Net income attributable to Yahoo! Inc. common stockholders per share — basic	$	6.82	$	0.08	$	7.35	$	0.08

*Diluted:*
Numerator:
Net income attributable to Yahoo! Inc.	$	6,774,102	$	76,261	$	7,355,387	$	75,905
Less: Net income allocated to participating securities		(60)		-		(65)		-
Less: Effect of dilutive securities issued by equity investees		(20,705)		(1,112)		(42,491)		(3,431)

Net income attributable to Yahoo! Inc. common stockholders — diluted	$	6,753,337	$	75,149	$	7,312,831	$	72,474

Denominator:
Denominator for basic calculation		993,543		940,822		1,001,066		937,713
Weighted average effect of Yahoo! Inc. dilutive securities:
Restricted stock units		10,638		4,551		12,388		5,155
Stock options and employee stock purchase plan		3,512		1,561		4,481		1,292

Denominator for diluted calculation		1,007,693		946,934		1,017,935		944,160

Net income attributable to Yahoo! Inc. common stockholders per share — diluted	$	6.70	$	0.08	$	7.18	$	0.08

- Definition

The entire disclosure for earnings per share.

+ References+ Details

Investments In Equity Interests Using The Equity Method Of Accounting

9 Months Ended

Sep. 30, 2015

Investments In Equity Interests Using The Equity Method Of Accounting

Note 8 Investments In Equity Interests Using The Equity Method Of Accounting

The following table summarizes the Company’s investments in equity interests using the equity method of accounting (dollars in thousands):


	December 31,		Percent		September 30,		Percent
	2014		Ownership		2015		Ownership

Yahoo Japan	$	2,482,660		35.5%	$	2,326,486		35.5%
Other		6,918		20%		6,577		20%

Total	$	2,489,578			$	2,333,063

Equity Investment in Yahoo Japan

The investment in Yahoo Japan Corporation (“Yahoo Japan”) is accounted for using the equity method and the total investment, including net tangible assets, identifiable intangible assets, and goodwill, is classified as part of the investments in equity interests balance on the Company’s condensed consolidated balance sheets. The Company records its share of the results of Yahoo Japan, and any related amortization expense, one quarter in arrears within earnings in equity interests in the condensed consolidated statements of operations.

The Company makes adjustments to the earnings in equity interests line in the condensed consolidated statements of operations for any material differences between U.S. GAAP and International Financial Reporting Standards (“IFRS”) issued by the International Accounting Standards Board, the standards by which Yahoo Japan’s financial statements are prepared.

The fair value of the Company’s ownership interest in the common stock of Yahoo Japan, based on the quoted stock price, was approximately $7.7 billion as of September 30, 2015.

During the nine months ended September 30, 2014 and 2015, the Company received cash dividends from Yahoo Japan in the amount of $84 million and $142 million, net of withholding taxes, respectively, which were recorded as reductions to the Company’s investment in Yahoo Japan.

During the nine months ended September 30, 2014, the Company sold data center assets and assigned a data center lease to Yahoo Japan for cash proceeds of $11 million and recorded a net gain of approximately $5 million.

The following tables present summarized financial information derived from Yahoo Japan’s consolidated financial statements, which are prepared on the basis of IFRS. The Company has made adjustments to the Yahoo Japan financial information to address differences between IFRS and U.S. GAAP that materially impact the summarized financial information below. Apart from such adjustments, the other differences between U.S. GAAP and IFRS did not have any material impact on the Yahoo Japan summarized financial information presented below.


	Three Months Ended				Nine Months Ended
	June 30,		June 30,		June 30,		June 30,
	2014		2015		2014		2015

	(in thousands)
Operating data:
Revenue	$	963,796	$	911,735	$	3,050,516	$	2,840,393
Gross profit	$	761,802	$	712,561	$	2,466,986	$	2,254,511
Income from operations	$	485,164	$	402,865	$	1,452,551	$	1,266,084
Net income	$	321,534	$	274,567	$	942,675	$	836,081
Net income attributable to Yahoo Japan	$	318,571	$	273,636	$	934,098	$	832,611


	September 30,		June 30,
	2014		2015

	(in thousands)
Balance sheet data:
Current assets	$	6,161,126	$	5,729,119
Long-term assets	$	1,908,379	$	2,198,578
Current liabilities	$	1,948,540	$	1,800,500
Long-term liabilities	$	35,418	$	239,240
Noncontrolling interests	$	66,998	$	163,216

Under technology and trademark license and other commercial arrangements with Yahoo Japan, the Company records revenue from Yahoo Japan based on a percentage of advertising revenue earned by Yahoo Japan. The Company recorded revenue from Yahoo Japan of approximately $66 million and $57 million for the three months ended September 30, 2014 and 2015, respectively, and approximately $197 million and $172 million for the nine months ended September 30, 2014 and 2015, respectively. The revenue from Yahoo Japan for the three and nine months ended September 30, 2015 was impacted by unfavorable foreign exchange fluctuations of $6 million and $17 million, respectively, using the foreign currency exchange rates from the three and nine months ended September 30, 2014. As of December 31, 2014 and September 30, 2015, the Company had receivable balances from Yahoo Japan of approximately $47 million and $38 million, respectively.

Alibaba Group

Equity Investment in Alibaba Group. Prior to the closing of the Alibaba Group IPO in September 2014, the Company’s investment in Alibaba Group was accounted for using the equity method, and the total investment, including net tangible assets, identifiable intangible assets, and goodwill, was classified as part of investments in equity interests balance on the Company’s condensed consolidated balance sheets. Prior to the Alibaba Group IPO, the Company recorded its share of the results of Alibaba Group one quarter in arrears within earnings in equity interests in the condensed consolidated statements of operations, including any related tax impacts related to the earnings in equity interest.

Technology and Intellectual Property License Agreement (the “TIPLA”). As a result of the Alibaba Group IPO, Alibaba Group’s obligation to make royalty payments under the TIPLA ceased on September 24, 2014 and the Company’s recognition of the remaining TIPLA deferred revenue was completed on September 18, 2015. For the three months ended September 30, 2014 and 2015, the Company recognized approximately $74 million and $60 million, respectively, and for the nine months ended September 30, 2014 and 2015, the Company recognized approximately $205 million and $199 million, respectively, related to the TIPLA.

Spin-Off of Remaining Holdings in Alibaba Group. On January 27, 2015, the Company announced a plan for a spin-off of all of the Company’s remaining holdings in Alibaba Group into a newly formed independent registered investment company. The name selected for the new company is Aabaco Holdings, Inc. (“Aabaco”). The stock of Aabaco will be distributed pro rata to Yahoo stockholders, resulting in Aabaco becoming a separate publicly traded registered investment company. On July 17, 2015, Aabaco filed its initial Registration Statement on Form N-2 with the U.S. Securities and Exchange Commission (“SEC”), which it subsequently amended on September 28, 2015. Following the completion of the transaction, Aabaco will own, directly or indirectly, all of Yahoo’s remaining 384 million Alibaba Group ordinary shares (the “Alibaba Group shares”) and a 100 percent ownership interest in Aabaco Small Business, LLC (“ASB”), a newly formed entity which will own Yahoo Small Business, a current operating business of Yahoo that will also be transferred to Aabaco as part of the transaction.

The spin-off transaction is subject to certain conditions, including final approval by the Company’s Board, receipt of a legal opinion from Skadden, Arps, Slate, Meagher & Flom LLP with respect to certain tax matters, including the qualification of the spin-off as a tax-free transaction under the Internal Revenue Code of 1986, as amended, the registration of Aabaco’s common stock under the Securities Exchange Act of 1934, the acceptance of Aabaco’s common stock for listing on the Nasdaq Global Select Market, and certain other conditions. In addition, in connection with the spin-off transaction, the Company will be required to comply with applicable covenants in certain material contracts, including compliance with applicable covenants in the indenture governing the Notes.

Each of the conditions may be waived, in whole or in part (to the extent permitted by applicable law), by the Company in its sole and absolute discretion. The Company has reserved the right, in its sole and absolute discretion, to abandon or modify the terms of the transaction at any time prior to the distribution date, even if the conditions to the transaction have been satisfied.

The completion of the transaction is expected to occur prior to the end of January 2016, subject to the conditions described above. The composition of Aabaco’s independent board of directors and management team, and other details of the transaction, including the distribution ratio, will be determined prior to the completion of the transaction.

Upon completion of the transaction, which is subject to the satisfaction or waiver of the conditions specified above, the Company’s consolidated financial position will be materially impacted as the Alibaba Group shares and related deferred tax liabilities will be removed from the Company’s condensed consolidated balance sheet. The Company would no longer hold any Alibaba Group shares and would no longer record changes in fair value within comprehensive income (loss).

- Definition

The entire disclosure for equity method investments and joint ventures. Equity method investments are investments that give the investor the ability to exercise significant influence over the operating and financial policies of an investee. Joint ventures are entities owned and operated by a small group of businesses as a separate and specific business or project for the mutual benefit of the members of the group.

+ References+ Details

Foreign Currency Derivative Financial Instruments

9 Months Ended

Sep. 30, 2015

Foreign Currency Derivative Financial Instruments

Note 9 Foreign Currency Derivative Financial Instruments

The Company uses derivative financial instruments, primarily forward contracts and option contracts, to mitigate risk associated with adverse movements in foreign currency exchange rates.

The Company records all derivatives in the condensed consolidated balance sheets at fair value, with assets included in prepaid expenses and other current assets or other long-term assets and investments, and liabilities included in accrued expenses and other current liabilities or other long-term liabilities. The Company’s accounting treatment for these instruments is based on whether or not the instruments are designated as a hedging instrument. The effective portions of net investment hedges are recorded in other comprehensive income as a part of the cumulative translation adjustment. The effective portions of cash flow hedges are recorded in accumulated other comprehensive income until the hedged item is recognized in revenue on the condensed consolidated statements of operations when the underlying hedged revenue is recognized. Any ineffective portions of net investment hedges and cash flow hedges are recorded in other income (expense), net on the Company’s condensed consolidated statements of operations. For balance sheet hedges, changes in the fair value are recorded in other income (expense), net on the Company’s condensed consolidated statements of operations.

The Company enters into master netting arrangements, which are designed to reduce credit risk by permitting net settlement of foreign exchange contracts with the same counterparty, subject to applicable requirements. The Company presents its derivative assets and liabilities at their gross fair values on the condensed consolidated balance sheets. The Company is not required to pledge, and is not entitled to receive, cash collateral related to these derivative transactions.

Designated as Hedging Instruments

Net Investment Hedges. The Company currently hedges, on an after-tax basis, a portion of its net investment in Yahoo Japan with forward contracts and option contracts to reduce the risk that its investment in Yahoo Japan will be adversely affected by foreign currency exchange rate fluctuations. The total of the after-tax net investment hedge was less than the Yahoo Japan investment balance as of both December 31, 2014 and September 30, 2015. As such, the net investment hedge was considered to be effective.

Cash Flow Hedges. The Company entered into foreign currency forward contracts designated as cash flow hedges of varying maturities through December 31, 2016. All of the forward contracts designated as cash flow hedges that were settled were reclassified to revenue during the three and nine months ended September 30, 2014 and 2015, respectively. All current outstanding cash flow hedges are expected to be reclassified into revenue during fiscal years 2015 and 2016. For the three and nine months ended September 30, 2014 and 2015, the amounts recorded in other income (expense), net as a result of hedge ineffectiveness was not material.

Not Designated as Hedging Instruments

Balance Sheet Hedges. The Company hedges certain of its net recognized foreign currency assets and liabilities with foreign exchange forward contracts to reduce the risk that its earnings and cash flows will be adversely affected by changes in foreign currency exchange rates. These derivative instruments hedge assets and liabilities, including intercompany transactions, which are denominated in foreign currencies.

Notional amounts of the Company’s outstanding derivative contracts were as follows (in millions):


	December 31,		September 30,
	2014		2015

Derivatives designated as hedging instruments:
Net investment hedge forward and option contracts	$	1,647	$	1,502
Cash flow hedge forwards	$	222	$	122
Derivatives not designated as hedging instruments:
Balance sheet hedges	$	243	$	257

Foreign currency derivative activity for the nine months ended September 30, 2014 was as follows (in millions):


	Beginning Fair Value		Settlement Payment (Receipt)			Gain (Loss) Recorded in Other Income (Expense), Net			Gain (Loss) Recorded in Other Comprehensive Income (Loss)			Gain (Loss) Recorded in Revenue		Ending Fair Value

Derivatives designated as hedging instruments:
Net investment hedges	$	209	$	(178	)	$	-		$	78	(*)	$	-	$	109
Cash flow hedges	$	4	$	(2	)	$	(1	)	$	(1)		$	4	$	4
Derivatives not designated as hedging instruments:
Balance sheet hedges	$	-	$	(1	)	$	11		$	-		$	-	$	10

(*) This amount does not reflect the tax impact of $29 million recorded during the nine months ended September 30, 2014. The $49 million after tax impact of the loss recorded within other comprehensive income was included in accumulated other comprehensive income on the Company’s condensed consolidated balance sheets as of September 30, 2014.

Foreign currency derivative activity for the nine months ended September 30, 2015 was as follows (in millions):


	Beginning Fair Value		Settlement Payment (Receipt)			Gain (Loss) Recorded in Other Income (Expense), Net			Gain (Loss) Recorded in Other Comprehensive Income (Loss)			Gain (Loss) Recorded in Revenue			Ending Fair Value

Derivatives designated as hedging instruments:
Net investment hedges	$	185	$	(92	)	$	1		$	7	(*)	$	-		$	101
Cash flow hedges	$	8	$	(1	)	$	(1	)	$	(3)		$	(2	)	$	1
Derivatives not designated as hedging instruments:
Balance sheet hedges	$	4	$	(22	)	$	17		$	-		$	-		$	(1	)

(*) This amount does not reflect the tax impact of $3 million recorded during the nine months ended September 30, 2015. The $4 million after tax impact of the gain recorded within other comprehensive income was included in accumulated other comprehensive income on the Company’s condensed consolidated balance sheets.

Foreign currency derivative contracts balance sheet location and ending fair value was as follows (in millions):


	Balance Sheet	December 31,		September 30,
	Location	2014		2015

Derivatives designated as hedging instruments:

Net investment hedges	Asset⁽¹⁾	$	190	$	107

	Liability⁽²⁾	$	(5)	$	(6)

Cash flow hedges	Asset⁽¹⁾	$	8	$	2

	Liability⁽²⁾	$	-	$	(1)



Derivatives not designated as hedging instruments:

Balance sheet hedges	Asset⁽¹⁾	$	5	$	2

	Liability⁽²⁾	$	(1)	$	(3)

(1)	Included in prepaid expenses and other current assets or other long-term assets and investments on the condensed consolidated balance sheets.

(2)	Included in accrued expenses and other current liabilities or other long-term liabilities on the condensed consolidated balance sheets.

- Definition

The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.

+ References

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+ Details

Credit Agreement

9 Months Ended

Sep. 30, 2015

Credit Agreement

Note 10 Credit Agreement

The Company’s credit agreement with Citibank, N.A., as Administrative Agent entered into on October 19, 2012 (as amended on October 10, 2013, October 9, 2014, and July 24, 2015, the “Credit Agreement”) provides for a $750 million unsecured revolving credit facility, subject to increase of up to $250 million in accordance with its terms. The Credit Agreement terminates on July 22, 2016, unless extended by the parties. As of September 30, 2015, the Company was in compliance with the financial covenants in the Credit Agreement and no amounts were outstanding.

Convertible Notes

9 Months Ended

Sep. 30, 2015

Convertible Notes

Note 11 Convertible Notes

0.00% Convertible Senior Notes

As of September 30, 2015, the Company had $1.4 billion principal amount of Notes outstanding. The Notes are senior unsecured obligations of Yahoo, the Notes do not bear regular interest, and the principal amount of the Notes does not accrete. The Notes mature on December 1, 2018, unless previously purchased or converted in accordance with their terms prior to such date. The Company may not redeem the Notes prior to maturity. However, holders of the Notes may convert them at certain times and upon the occurrence of certain events in the future, as outlined in the indenture governing the Notes (the “Indenture”). Holders of the Notes who convert in connection with a “make-whole fundamental change,” as defined in the Indenture, may require Yahoo to purchase for cash all or any portion of their Notes at a purchase price equal to 100 percent of the principal amount, plus accrued and unpaid special interest as defined in the Indenture, if any. The Notes are convertible, subject to certain conditions, into shares of Yahoo common stock at an initial conversion rate of 18.7161 shares per $1,000 principal amount of Notes (which is equivalent to an initial conversion price of approximately $53.43 per share), subject to adjustment upon the occurrence of certain events. Upon conversion of the Notes, holders will receive cash, shares of Yahoo’s common stock or a combination thereof, at Yahoo’s election. The Company’s intent is to settle the principal amount of the Notes in cash upon conversion. If the conversion value exceeds the principal amount, the Company would deliver shares of its common stock with respect to the remainder of its conversion obligation in excess of the aggregate principal amount (conversion spread). As of September 30, 2015, none of the conditions allowing holders of the Notes to convert had been met.

The Notes consist of the following (in thousands):


	December 31, 2014		September 30, 2015

Liability component:
Principal	$	1,437,500	$	1,437,500
Less: note discount		(267,077)		(220,092)

Net carrying amount	$	1,170,423	$	1,217,408

Equity component ^(*)	$	305,569	$	305,569

(*)	Recorded on the condensed consolidated balance sheets within additional paid-in capital.

The following table sets forth total interest expense recognized related to the Notes (in thousands):


	Three Months Ended				Nine Months Ended
	September 30, 2014		September 30, 2015		September 30, 2014		September 30, 2015

Accretion of convertible note discount	$	15,056	$	15,867	$	44,583	$	46,984

The estimated fair value of the Notes, which was determined based on inputs that are observable in the market (Level 2) was as follows (in thousands):


	December 31, 2014				September 30, 2015
	Fair Value		Carrying Value		Fair Value		Carrying Value

Convertible senior notes	$	1,175,240	$	1,170,423	$	1,248,922	$	1,217,408

Commitments And Contingencies

9 Months Ended

Sep. 30, 2015

Commitments And Contingencies

Note 12 Commitments And Contingencies

Lease Commitments. The Company leases office space and data centers under operating and capital lease agreements with original lease periods of up to 15 years which expire between 2015 and 2025. A summary of gross and net lease commitments as of September 30, 2015 was as follows (in millions):


	Gross Operating Lease Commitments		Sublease Income		Net Operating Lease Commitments

Three months ending December 31, 2015	$	29	$	(4)	$	25
Years ending December 31,
2016	$	107	$	(12)	$	95
2017	$	80	$	(9)	$	71
2018	$	56	$	(7)	$	49
2019	$	45	$	(5)	$	40
2020	$	31	$	(2)	$	29
Due after 5 years	$	84	$	(4)	$	80

Total gross and net lease commitments	$	432	$	(43)	$	389


	Capital Lease Commitments

Three months ending December 31, 2015	$	6
Years ending December 31,
2016		15
2017		10
2018		9
2019		5
2020		-
Due after 5 years		-

Gross capital lease commitments		45
Less: interest		8

Net capital lease commitments included in other accrued expenses and current liabilities and other long-term liabilities	$	37

Affiliate Commitments. The Company is obligated to make payments, which represent TAC, to its Affiliates. As of September 30, 2015, these commitments totaled $1,682 million, of which $100 million will be payable in the remainder of 2015, $401 million will be payable in 2016, $400 million will be payable in 2017, $375 million will be payable in 2018, $375 million will be payable in 2019, and $31 million will be payable thereafter.

Non-cancelable Obligations. The Company is obligated to make payments under various non-cancelable arrangements with vendors and other business partners, principally for marketing, bandwidth, co-location, and content arrangements. As of September 30, 2015, these commitments totaled $191 million, of which $52 million will be payable in the remainder of 2015, $101 million will be payable in 2016, $23 million will be payable in 2017, $13 million will be payable in 2018, and $2 million will be payable in 2019.

Intellectual Property Rights. The Company is committed to make certain payments under various intellectual property arrangements of up to $18 million through 2023.

Finance Lease Obligations. The Company is deemed to be the owner after occupancy of a certain facility that was constructed as a build-to-suit lease arrangement and previously reflected as accrued expenses and current liabilities on the Company’s condensed consolidated balance sheet. As such, this arrangement is accounted for as a finance lease. As of September 30, 2015, this commitment totaled $18 million, of which less than $1 million will be payable in 2016, $1 million will be payable in 2017, $2 million will be payable in 2018, $2 million will be payable in 2019, $2 million will be payable in 2020, and $10 million will be payable thereafter.

Construction Liabilities. The estimated timing and amounts of payments for rent associated with the build-to-suit lease arrangement that has not been placed in service totaled $40 million, of which less than $1 million will be payable in the remainder of 2015, $2 million will be payable in 2016, $3 million will be payable in 2017, $4 million will be payable in 2018, $4 million will be payable in 2019, $4 million will be payable in 2020, and $22 million will be payable thereafter.

Other Commitments. In the ordinary course of business, the Company may provide indemnifications of varying scope and terms to customers, vendors, lessors, joint ventures and business partners, purchasers of assets or subsidiaries and other parties with respect to certain matters, including, but not limited to, losses arising out of the Company’s breach of agreements or representations and warranties made by the Company, services to be provided by the Company, intellectual property infringement claims made by third parties or, with respect to the sale, lease, or assignment of assets, or the sale of a subsidiary, matters related to the Company’s conduct of the business and tax matters prior to the sale, lease or assignment. In addition, the Company has entered into indemnification agreements with its directors and certain of its officers that will require the Company, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors or officers. The Company has also agreed to indemnify certain former officers, directors, and employees of acquired companies in connection with the acquisition of such companies. The Company maintains director and officer insurance, which may cover certain liabilities arising from its obligation to indemnify its current and former directors and officers, and former directors and officers of acquired companies, in certain circumstances. It is not possible to determine the aggregate maximum potential loss under these indemnification agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement. Such indemnification agreements might not be subject to maximum loss clauses. Historically, the Company has not incurred material costs as a result of obligations under these agreements and it has not accrued any material liabilities related to such indemnification obligations in the Company’s condensed consolidated financial statements.

As of September 30, 2015, the Company did not have any relationships with unconsolidated entities or financial partnerships, such as entities often referred to as structured finance or special purpose entities, established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes. Accordingly, the Company is not exposed to any financing, liquidity, market, or credit risk that could arise if the Company had such relationships. In addition, the Company identified no variable interests currently held in entities for which it is the primary beneficiary.

Legal Contingencies

General. The Company is regularly involved in claims, suits, government investigations, and proceedings arising from the ordinary course of the Company’s business, including actions with respect to intellectual property claims, privacy, consumer protection, information security, data protection or law enforcement matters, tax matters, labor and employment claims, commercial claims, as well as actions involving content generated by users, stockholder derivative actions, purported class action lawsuits, and other matters.

Patent Matters. From time to time, third parties assert patent infringement claims against the Company. Currently, the Company is engaged in lawsuits regarding patent issues and has been notified of other potential patent disputes.

Stockholder and Securities Matters. Since May 31, 2011, several related stockholder derivative suits were filed in the Santa Clara County Superior Court (“California Derivative Litigation”) and the U.S. District Court for the Northern District of California (“Federal Derivative Litigation”) purportedly on behalf of the Company against certain officers and directors of the Company and third parties. The California Derivative Litigation was filed by plaintiffs Cinotto, Lassoff, Zucker, and Koo, and consolidated under the caption In re Yahoo! Inc. Derivative Shareholder Litigation on June 24, 2011 and September 12, 2011. The Federal Derivative Litigation was filed by plaintiffs Salzman, Tawila, and Iron Workers Mid-South Pension Fund and consolidated under the caption In re Yahoo! Inc. Shareholder Derivative Litigation on October 3, 2011. The plaintiffs allege breaches of fiduciary duties, corporate waste, mismanagement, abuse of control, unjust enrichment, misappropriation of corporate assets, or contribution, and seek damages, equitable relief, disgorgement, and corporate governance changes in connection with Alibaba Group’s restructuring of its subsidiary Alipay.com Co., Ltd. (“Alipay”) and related disclosures. On June 7, 2012, the courts approved stipulations staying the California Derivative Litigation pending resolution of the Federal Derivative Litigation, and deferring the Federal Derivative Litigation pending a ruling on the motion to dismiss filed by the defendants in the related stockholder class actions, which are discussed below. The Federal Derivative Litigation was stayed pending resolution of the appeal filed by the plaintiffs in the related stockholder class actions, which now has concluded as described below. The Company has filed a motion to dismiss the Federal Derivative Litigation.

Since June 6, 2011, two purported stockholder class actions were filed in the U.S. District Court for the Northern District of California against the Company and certain officers and directors of the Company by plaintiffs Bonato and the Twin Cities Pipe Trades Pension Trust. In October 2011, the District Court consolidated the two actions under the caption In re Yahoo! Inc. Securities Litigation and appointed the Pension Trust Fund for Operating Engineers as lead plaintiff. In a consolidated amended complaint filed December 15, 2011, the lead plaintiff purported to represent a class of investors who purchased the Company’s common stock between April 19, 2011 and July 29, 2011, and alleged that during that class period, defendants issued statements that were materially false or misleading because they did not disclose information relating to Alibaba Group’s restructuring of Alipay. The complaint purported to assert claims for relief for violation of Section 10(b) and 20(a) of the Securities Exchange Act of 1934, as amended, and for violation of Rule 10b-5 thereunder, and sought unspecified damages, injunctive and equitable relief, fees, and costs. On August 10, 2012, the District Court granted defendants’ motion to dismiss the consolidated amended complaint. Plaintiffs appealed. On May 15, 2015, the U.S. Court of Appeals for the Ninth Circuit affirmed the dismissal.

On April 22, 2015, a stockholder action captioned Cathy Buch v. David Filo, et al., was filed in the Delaware Court of Chancery against Yahoo and all current members of the Board. The complaint asserts both derivative claims, purportedly on behalf of Yahoo, and class action claims, purportedly on behalf of the plaintiff and all similarly situated stockholders, relating to the termination of, and severance payments made to, our former chief operating officer, Henrique de Castro. The plaintiff alleges that the board members breached their fiduciary duties by enabling or acquiescing in the payment of severance to Mr. de Castro, and by allowing Yahoo to make allegedly false and misleading statements regarding the value of his severance. The plaintiff has also asserted claims against Mr. de Castro. The plaintiff seeks to recoup the severance paid to Mr. de Castro, an equitable accounting, disgorgement in favor of Yahoo, monetary damages, declaratory relief, injunctive relief, and an award of attorneys’ fees and costs. The Company has filed a motion to dismiss the action.

Mexico Matters. On November 16, 2011, plaintiffs Worldwide Directories, S.A. de C.V. (“WWD”), and Ideas Interactivas, S.A. de C.V. (“Ideas”) filed an action in the 49th Civil Court of Mexico against the Company, Yahoo! de Mexico, S.A. de C.V. (“Yahoo! Mexico”), Yahoo International Subsidiary Holdings, Inc., and Yahoo Hispanic Americas LLC. The complaint alleged claims of breach of contract, breach of promise, and lost profits in connection with various commercial contracts entered into among the parties between 2002 and 2004, relating to a business listings service, and alleged total damages of approximately $2.75 billion. On December 7, 2011, Yahoo! Mexico filed a counterclaim against WWD for payments of approximately $2.6 million owed to Yahoo! Mexico for services rendered. On April 10, 2012, plaintiffs withdrew their claim filed against Yahoo International Subsidiary Holdings, Inc. and Yahoo Hispanic Americas LLC.

On November 28, 2012, the 49th Civil Court of Mexico entered a non-final judgment against the Company and Yahoo! Mexico in the amount of USD $2.75 billion and a non-final judgment in favor of Yahoo! Mexico on its counterclaim against WWD in the amount of $2.6 million. The judgment against the Company and Yahoo! Mexico purported to leave open for determination in future proceedings certain other alleged damages that were not quantified in the judgment.

On December 12, 2012 and December 13, 2012, respectively, Yahoo! Mexico and the Company appealed the judgment to a three-magistrate panel of the Superior Court of Justice for the Federal District (the “Superior Court”). On May 15, 2013, the Superior Court reversed the judgment, overturned all monetary awards against the Company and reduced the monetary award against Yahoo! Mexico to $172,500. The Superior Court affirmed the award of $2.6 million in favor of Yahoo! Mexico on its counterclaim.

Plaintiffs appealed the Superior Court’s decision to the Mexican Federal Civil Collegiate Court for the First Circuit (“Civil Collegiate Court”). The Company appealed the Superior Court’s decision not to award it statutory costs in the underlying proceeding. Yahoo! Mexico appealed the Superior Court’s award of $172,500, the Superior Court’s decision not to award it additional moneys beyond the $2.6 million award on its counterclaims, and the Superior Court’s decision not to award it statutory costs. On January 14, 2015, the Civil Collegiate Court denied all of the appeals.

On February 16, 2015, plaintiffs filed a petition for review by the Supreme Court of Mexico, where review is limited to constitutional questions under Mexican law. The plaintiffs’ petition was denied. Plaintiffs then filed an additional petition seeking to reverse the denial through further review. On September 22, 2015, the Supreme Court of Mexico issued its written decision denying that petition. This decision concludes plaintiffs’ appeals in Mexico.

On September 10, 2014, the same plaintiffs in the Mexico litigation described above filed an action in U.S. District Court for the Southern District of New York against Yahoo! Inc., Yahoo! Mexico, Baker & McKenzie, and Baker & McKenzie, S.C. Plaintiffs allege that defendants conspired to influence the Mexican courts and “illegally obtain a favorable judgment” in the above litigation. Plaintiffs advance claims for relief under the Racketeer Influenced and Corrupt Organizations Act of 1970 (“RICO”), which provides for treble damages in certain cases, conspiracy to violate RICO, common-law fraud, and civil conspiracy. Their operative amended complaint seeks unspecified damages. The Company and Yahoo! Mexico have filed a motion to dismiss the amended complaint. The Company believes the plaintiffs’ claims in this action are without merit.

The Company has determined, based on current knowledge, that the amount or range of reasonably possible losses, including reasonably possible losses in excess of amounts already accrued, is not reasonably estimable with respect to certain matters described above. The Company has also determined, based on current knowledge, that the aggregate amount or range of losses that are estimable with respect to the Company’s legal proceedings, including the matters described above, other than the remaining Mexico matter, would not have a material adverse effect on the Company’s consolidated financial position, results of operations or cash flows. Amounts accrued as of September 30, 2015 were not material. The Company did not accrue for the judgment in Mexico, which was reversed as explained above. The ultimate outcome of legal proceedings involves judgments, estimates and inherent uncertainties, and cannot be predicted with certainty. In the event of a determination adverse to Yahoo, its subsidiaries, directors, or officers in these matters, the Company may incur substantial monetary liability, and be required to change its business practices. Either of these events could have a material adverse effect on the Company’s financial position, results of operations, or cash flows. The Company may also incur substantial legal fees, which are expensed as incurred, in defending against these claims.

- Definition

The entire disclosure for commitments and contingencies.

+ References+ Details

Stockholders' Equity And Employee Benefits

9 Months Ended

Sep. 30, 2015

Stockholders' Equity And Employee Benefits

Note 13 Stockholders’ Equity And Employee Benefits

Stock Options. The Company’s Stock Plan, the Directors’ Plan, and stock-based awards assumed through acquisitions (including stock-based commitments related to continued service of acquired employees, such as holdbacks by Yahoo of shares of Yahoo common stock issued to founders of acquired companies in connection with certain of the Company’s acquisitions) are collectively referred to as the “Plans.” Stock option activity under the Company’s Plans for the nine months ended September 30, 2015 is summarized as follows (in thousands, except per share amounts):


	Shares		Weighted Average Exercise Price Per Share

Outstanding at December 31, 2014⁽¹⁾		9,225	$	18.57
Options granted		-	$	-
Options assumed in acquisitions		407	$	11.89
Options exercised⁽²⁾		(1,709)	$	16.59
Options expired		(579)	$	19.11
Options cancelled/forfeited		(313)	$	19.89

Outstanding at September 30, 2015⁽¹⁾		7,031	$	18.56

⁽¹⁾	Includes shares subject to performance-based stock options for which performance goals had not been set as of the date shown.

⁽²⁾	The Company generally issues new shares to satisfy stock option exercises.

As of September 30, 2015, there was $31 million of unamortized stock-based compensation expense related to unvested stock options, which is expected to be recognized over a weighted average period of 1.8 years.

The fair value of option grants, including assumed options from acquisitions, was determined using the Black-Scholes option pricing model with the following weighted average assumptions:


	Stock Options		Stock Options		Stock Options		Stock Options
	Three Months Ended		Three Months Ended		Nine Months Ended		Nine Months Ended
	September 30,		September 30,		September 30,		September 30,
	2014		2015		2014		2015

Expected dividend yield		0.0%		0.0%		0.0%		0.0%
Risk-free interest rate		1.1%		0.9%		1.3%		0.9%
Expected volatility		32.7%		34.5%		35.8%		34.5%
Expected life (in years)		3.30		2.5		3.77		2.5

Restricted Stock Units. Restricted stock unit (“RSU”) activity under the Plans for the nine months ended September 30, 2015 is summarized as follows (in thousands, except per share amounts):


	Shares		Weighted Average Grant Date Fair Value Per Share

Awarded and unvested at December 31, 2014⁽¹⁾		40,677	$	32.38
Granted⁽²⁾		14,799	$	42.37
Assumed in acquisitions		-	$	-
Vested		(13,844)	$	28.30
Forfeited		(9,918)	$	32.93

Awarded and unvested at September 30, 2015⁽¹⁾		31,714	$	38.66

⁽¹⁾	Includes the maximum number of shares issuable under the Company’s performance-based restricted stock unit awards (including future-year tranches for which performance goals had not been set) as of the date shown.

⁽²⁾

Includes the maximum number of shares issuable under the performance-based restricted stock unit awards granted during the nine months ended September 30, 2015 (including future-year tranches for which performance goals had not been set during the period); excludes tranches of previously granted performance-based restricted stock units for which performance goals were set during the nine months ended September 30, 2015.

As of September 30, 2015, there was $764 million of unamortized stock-based compensation expense related to unvested restricted stock units which is expected to be recognized over a weighted average period of 2.4 years.

During the nine months ended September 30, 2014 and 2015, 16.0 million shares and 13.8 million shares, respectively, that were subject to previously granted restricted stock units, vested. These vested restricted stock units were net share settled. During the nine months ended September 30, 2014 and 2015, the Company withheld 6.0 million shares and 5.3 million shares, respectively, based upon the Company’s closing stock price on the vesting date, to satisfy the Company’s tax withholding obligation relating to the employees’ minimum statutory obligation for the applicable income and other employment taxes. The Company then remitted cash to the appropriate taxing authorities.

Total payments for the employees’ tax obligations to the relevant taxing authorities were $226 million and $216 million, respectively, for the nine months ended September 30, 2014 and 2015 and are reflected as a financing activity within the condensed consolidated statements of cash flows. The payments were used for tax withholdings related to the net share settlements of restricted stock units. The payments had the effect of share repurchases by the Company as they reduced the number of shares that would have otherwise been issued on the vesting date and were recorded as a reduction of additional paid-in capital.

Performance Options. The financial performance stock options awarded by the Company in November 2012 to Ms. Mayer and Mr. Goldman include multiple performance periods. The number of stock options that ultimately vest for each performance period will range from 0 percent to 100 percent of the target amount for such period stated in each executive’s award agreement based on the Company’s performance relative to goals. The financial performance goals are established at the beginning of each performance period and the portion (or “tranche”) of the award related to each performance period is treated as a separate grant for accounting purposes. In March 2015, the Compensation Committee established performance goals under these stock options for the 2015 performance year. The 2015 financial performance metrics (and their weightings) under the performance stock options are GAAP revenue (one-third), revenue ex-TAC (one-third), and adjusted EBITDA (one-third). The grant date fair value of the 2015 tranche of the November 2012 financial performance stock options was $31 million, and is being recognized over the twelve-month service period. The Company began recording stock-based compensation expense for this tranche in March 2015, when the financial performance goals were established.

Performance RSUs. In March 2015, the Compensation Committee approved additional annual financial performance-based RSU awards to Ms. Mayer and other senior officers, and established the 2015 annual performance goals for these awards as well as for the similar performance-based RSUs granted in February 2013 and February 2014. The 2013, 2014, and 2015 performance-based RSU awards are generally eligible to vest in equal annual target amounts over four years (three years for Ms. Mayer) based on the Company’s attainment of annual financial performance goals as well as the executive’s continued employment through each vesting date. The number of shares that ultimately vest each year will range from 0 percent to 200 percent of the annual target amount, based on the Company’s performance. Annual financial performance metrics and goals are established for these RSU awards at the beginning of each year and the tranche of each RSU award related to that year’s performance goal is treated as a separate annual grant for accounting purposes. The 2015 financial performance metrics (and their weightings) established for the performance RSUs are: GAAP revenue (one-third), revenue ex-TAC (one-third), and adjusted EBITDA (one-third). The grant date fair value of the first tranche of the March 2015 performance RSUs was $9 million, the grant date fair value of the second tranche of the February 2014 performance RSUs was $11 million, and the grant date fair value of the third tranche of the February 2013 performance RSUs was $19 million. These values are being recognized over the tranches’ twelve-month service periods. The Company began recording stock-based compensation expense for these tranches in March 2015, when the financial performance goals were established.

Stock Repurchases. In November 2013, the Board authorized a stock repurchase program with an authorized level of $5 billion. The November 2013 program, according to its terms, will expire in December 2016. The aggregate amount available under the November 2013 repurchase program was approximately $726 million at September 30, 2015. In March 2015, the Board authorized an additional stock repurchase program with an authorized level of $2 billion. The March 2015 program, according to its terms, will expire in March 2018. The aggregate amount available under the March 2015 repurchase program was $2 billion at September 30, 2015. Repurchases under the repurchase programs may take place in the open market or in privately negotiated transactions, including structured and derivative transactions such as accelerated share repurchase transactions, and may be made under a Rule 10b5-1 plan. During the nine months ended September 30, 2015, the Company repurchased approximately 4 million shares of its common stock under its November 2013 program at an average price of $47.65 per share for a total of $204 million.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References+ Details

Restructuring Charges, Net

9 Months Ended

Sep. 30, 2015

Restructuring Charges, Net

Note 14 Restructuring Charges, Net

Restructuring charges, net was comprised of the following (in thousands):


	Three Months Ended				Nine Months Ended
	September 30,		September 30,		September 30,		September 30,
	2014		2015		2014		2015

Employee severance pay and related costs	$	4,086	$	16,597	$	7,759	$	67,746
Non-cancelable lease, contract termination, and other charges		4,545		11,103		72,983		33,123
Reversals of previous charges		(161)		(2,590)		(3,133)		(6,611)
Non-cash accelerations of stock-based compensation expense		-		-		-		2,705
Other non-cash charges (credits)		-		902		(7,031)		(31)

Restructuring charges, net	$	8,470	$	26,012	$	70,578	$	96,932

The Company has implemented various restructuring plans to reduce its cost structure, align resources with its product strategy and improve efficiency, which have resulted in workforce reductions and the consolidation of certain real estate facilities and data centers. For the three months ended September 30, 2014, the Company recorded expense of $4 million, $1 million and $3 million related to the Americas, EMEA, and Asia Pacific segments, respectively. For the nine months ended September 30, 2014, the Company recorded expense of $59 million, $8 million and $4 million related to the Americas, EMEA, and Asia Pacific segments, respectively. For the three months ended September 30, 2015, the Company recorded expense of $9 million and $17 million related to the Americas and EMEA segments, respectively. For the nine months ended September 30, 2015, the Company recorded expense of $62 million, $31 million, and $4 million related to the Americas, EMEA, and Asia Pacific segments, respectively.

The Company’s restructuring accrual activity for the nine months ended September 30, 2015 is summarized as follows (in thousands):



Accrual balance as of December 31, 2014	$	83,608
Restructuring charges		96,932
Cash paid		(102,657)
Non-cash accelerations of stock-based compensation expense		(2,705)
Foreign currency translation and other adjustments		(910)

Accrual balance as of September 30, 2015	$	74,268

The $74 million restructuring liability as of September 30, 2015 consisted of $19 million for employee severance pay expenses, which the Company expects to pay out by the end of the second quarter of 2017, and $55 million relating to non-cancelable lease costs, which the Company expects to pay over the terms of the related obligations through the fourth quarter of 2025, less estimated sublease income.

The restructuring accrual by reportable segment consisted of the following (in thousands):


	December 31, 2014		September 30, 2015

Americas	$	65,949	$	51,891
EMEA		16,797		22,372
Asia Pacific		862		5

Total restructuring accruals	$	83,608	$	74,268

- Definition

The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled.

+ References+ Details

Income Taxes

9 Months Ended

Sep. 30, 2015

Income Taxes

Note 15 Income Taxes

The Company’s effective tax rate is the result of the mix of income earned and losses incurred in various tax jurisdictions that apply a broad range of income tax rates. Historically, the Company’s provision for income taxes has differed from the tax computed at the U.S. federal statutory income tax rate due to state taxes, the effect of non-U.S. operations, non-deductible stock-based compensation expense, non-deductible acquisition-related costs, and adjustments to unrecognized tax benefits.

The Company recorded income tax expense of $4 billion and income tax benefit of $93 million for the three months ended September 30, 2014 and 2015. The Company recorded income tax expense of $4 billion and income tax benefit of $76 million for the nine months ended September 30, 2014 and 2015. The income tax expense for the three and nine months ended September 30, 2014 was primarily associated with the Company’s taxable gain from the sale of 140 million ADSs in the Alibaba Group IPO on September 24, 2014. The income tax benefit for the same periods in 2015 was primarily a result of the Company’s loss before income taxes and earnings in equity interests.

On July 27, 2015, the United States Tax Court issued an opinion in Altera Corp. et al. v. Commissioner, which invalidated the 2003 final Treasury rule that requires participants in qualified cost-sharing arrangements to share stock-based compensation costs. Based on the decision of the Tax Court, the Company could be entitled to a future income tax benefit by excluding stock-based compensation costs from its cost sharing with affiliated entities for the period of time that the Company had the cost-sharing structure in place. However, there is uncertainty related to the IRS response to the Tax Court opinion, the final resolution of this issue, and the potential favorable benefits to the Company. The Company will continue to monitor developments related to this opinion and the potential impact of those developments on its current and prior fiscal years.

As of September 30, 2015, the Company does not anticipate repatriating its undistributed foreign earnings of approximately $3.2 billion. Those earnings are principally related to its equity method investment in Yahoo Japan. If those earnings were to be repatriated in the future, the Company may be subject to additional U.S. income taxes (subject to an adjustment for foreign tax credits). It is not practicable to determine the income tax liability that might be incurred if these earnings were to be repatriated.

The Company’s gross amount of unrecognized tax benefits as of September 30, 2015 was $1.1 billion, of which $1.0 billion is recorded on the condensed consolidated balance sheets. The gross unrecognized tax benefits as of September 30, 2015 increased by $30 million from the recorded balance as of December 31, 2014. The majority of the increase related to transfer prices among entities in different tax jurisdictions.

The Company is in various stages of examination and appeal in connection with its taxes both in the U.S. and in foreign jurisdictions. Those audits generally span tax years 2005 through 2013. As of September 30, 2015, the Company’s 2011 through 2013 U.S. federal income tax returns are currently under examination. The Company has protested the proposed California Franchise Tax Board’s adjustments to the 2005 through 2008 returns, but no conclusions have been reached to date. It is difficult to determine when the examinations will be settled or their final outcomes, certain audits in various jurisdictions are expected to be resolved in the foreseeable future. The Company believes that it has adequately provided for any reasonably foreseeable adjustment to its tax returns and that any settlement will not have a material adverse effect on its consolidated financial position, results of operations, or cash flows. It is reasonably possible that the Company’s unrecognized tax benefits could be reduced by up to approximately $152 million in the next twelve months.

In the three months ended March 31, 2015, we satisfied the $3.3 billion income tax liability related to the sale by Yahoo! Hong Kong Holdings Limited, our wholly-owned subsidiary, of Alibaba Group ADSs in the Alibaba Group IPO on September 24, 2014. As of September 30, 2015, the Company accrued deferred tax liabilities of $9.1 billion associated with the Alibaba Group shares retained by the Company. Such deferred tax liabilities will be subject to periodic adjustments due to changes in the fair value of the Alibaba Group shares. These deferred tax liabilities will become obligations of Aabaco upon completion of the planned spin-off transaction.

The Company may have additional tax liabilities in China related to the sale to Alibaba Group of 523 million Alibaba Group shares that took place during the year ended December 31, 2012 and related to the sale of the 140 million Alibaba Group ADSs sold in the Alibaba Group IPO that took place during the year ended December 31, 2014. Any taxes assessed and paid in China are expected to be ultimately offset and recovered in the U.S. through the use of foreign tax credits.

Tax authorities from the Brazilian State of Sao Paulo have assessed certain indirect taxes against the Company’s Brazilian subsidiary, Yahoo! do Brasil Internet Ltda., related to online advertising services. The assessment is for calendar years 2008 through 2011 and, translated into U.S. dollars as of September 30, 2015, totals approximately $86 million. The Company currently believes the assessment is without merit. The Company believes the risk of loss is remote and has not recorded an accrual for the assessment.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References+ Details

Segments

9 Months Ended

Sep. 30, 2015

Segments

Note 16 Segments

The Company continues to manage its business geographically. The primary areas of measurement and decision-making are Americas, EMEA (Europe, Middle East, and Africa), and Asia Pacific. Management relies on an internal reporting process that provides revenue, revenue ex-TAC (which is defined as revenue less cost of revenue – TAC), direct costs excluding TAC by segment, and consolidated income (loss) from operations for making decisions related to the evaluation of the financial performance of, and allocating resources to, the Company’s segments.

The following tables present summarized information by segment (in thousands):


	Three Months Ended				Nine Months Ended
	September 30,		September 30,		September 30,		September 30,
	2014		2015		2014		2015

Revenue by segment:
Americas	$	873,306	$	987,374	$	2,545,769	$	2,964,305
EMEA		89,058		79,614		278,475		246,530
Asia Pacific		185,776		158,685		540,817		484,073

Total Revenue	$	1,148,140	$	1,225,673	$	3,365,061	$	3,694,908

TAC by segment:
Americas	$	42,607	$	201,855	$	106,997	$	549,332
EMEA		7,980		12,745		27,385		37,399
Asia Pacific		3,593		8,629		9,533		19,867

Total TAC	$	54,180	$	223,229	$	143,915	$	606,598

Revenue ex-TAC by segment:
Americas	$	830,699	$	785,519	$	2,438,772	$	2,414,973
EMEA		81,078		66,869		251,090		209,131
Asia Pacific		182,183		150,056		531,284		464,206

Total Revenue ex-TAC		1,093,960		1,002,444		3,221,146		3,088,310

Direct costs by segment⁽¹⁾ :
Americas		66,516		84,582		213,000		240,406
EMEA		23,166		23,196		66,505		63,947
Asia Pacific		53,954		47,214		148,921		149,764
Global operating costs⁽²⁾		646,042		603,215		1,903,194		1,916,240
Gain on sales of patents		(1,300)		-		(62,800)		(11,100)
Asset impairment charge		-		41,699		-		41,699
Restructuring charges, net		8,470		26,012		70,578		96,932
Depreciation and amortization		149,144		152,412		453,538		457,630
Stock-based compensation expense		105,796		110,426		317,422		351,252

Income (loss) from operations	$	42,172	$	(86,312)	$	110,788	$	(218,460)

(1)

Direct costs for each segment include costs associated with the local sales teams and other cost of revenue. Prior to the fourth quarter of 2014, marketing, media, costs associated with Yahoo Properties and ad operation costs were managed locally and included as direct costs for each segment. Such costs are now included in global operating costs. Prior period amounts have been revised to conform to the current presentation.

(2)

Global operating costs include product development, marketing, real estate workplace, general and administrative, and other corporate expenses that are managed on a global basis and that are not directly attributable to any particular segment. Beginning in the fourth quarter of 2014, marketing, media, costs associated with Yahoo Properties and other ad operation costs are managed globally and included as global costs. Prior period amounts have been revised to conform to the current presentation.


	Three Months Ended				Nine Months Ended
	September 30,		September 30,		September 30,		September 30,
	2014		2015		2014		2015

Capital expenditures, net:
Americas	$	105,437	$	139,796	$	269,754	$	401,984
EMEA		3,034		4,616		22,070		19,265
Asia Pacific		3,783		5,969		12,443		19,495

Total capital expenditures, net	$	112,254	$	150,381	$	304,267	$	440,744


	December 31,		September 30,
	2014		2015

Property and equipment, net:
Americas:
U.S.	$	1,382,597	$	1,494,905
Other		787		495

Total Americas	$	1,383,384	$	1,495,400

EMEA		34,649		31,710
Asia Pacific		69,651		63,329

Total property and equipment, net	$	1,487,684	$	1,590,439

See Note 5 — “Goodwill” and Note 14 — “Restructuring Charges, Net” for additional information regarding segments.

Enterprise Wide Disclosures

The following table presents revenue for groups of similar services (in thousands):


	Three Months Ended				Nine Months Ended
	September 30,		September 30,		September 30,		September 30,
	2014		2015		2014		2015

Search	$	452,355	$	509,478	$	1,325,540	$	1,562,270
Display		446,980		508,617		1,336,257		1,472,726
Other		248,805		207,578		703,264		659,912

Total revenue	$	1,148,140	$	1,225,673	$	3,365,061	$	3,694,908


	Three Months Ended				Nine Months Ended
	September 30,		September 30,		September 30,		September 30,
	2014		2015		2014		2015

Revenue:
U.S.	$	839,080	$	958,394	$	2,444,696	$	2,887,134
International		309,060		267,279		920,365		807,774

Total revenue	$	1,148,140	$	1,225,673	$	3,365,061	$	3,694,908

Revenue is attributed to individual countries according to the online property that generated the revenue. No single foreign country was material to revenue for the three or nine months ended September 30, 2014 and 2015.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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-Name Accounting Standards Codification

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-Name Accounting Standards Codification

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+ Details

Search Agreement With Microsoft Corporation

9 Months Ended

Sep. 30, 2015

Search Agreement With Microsoft Corporation

Note 17 Search Agreement With Microsoft Corporation

On December 4, 2009, the Company entered into the Search Agreement with Microsoft. On February 18, 2010, the Company received regulatory clearance from both the U.S. Department of Justice and the European Commission and on February 23, 2010 the Company commenced implementation of the Search Agreement on a market-by-market basis.

On April 15, 2015, the Company and Microsoft entered into the Eleventh Amendment to the Search Agreement (the “Eleventh Amendment”) pursuant to which the terms of the Search Agreement were amended. Previously under the Search Agreement, Microsoft was the exclusive algorithmic and paid search services provider to Yahoo on personal computers for Yahoo Properties and for search services provided by Yahoo to Affiliate sites. Microsoft was the non-exclusive provider on mobile devices. Pursuant to the Eleventh Amendment, Microsoft will provide such services on a non-exclusive basis for Yahoo Properties and Affiliate sites on all devices. Commencing on May 1, 2015, Yahoo agrees to request paid search results from Microsoft for 51 percent of its search queries originating from personal computers accessing Yahoo Properties and its Affiliate sites (the “Volume Commitment”) and will display only Microsoft’s paid search results on such search result pages.

Previously under the Search Agreement, the Company was entitled to receive a percentage of the revenue (the “Revenue Share Rate”) generated from Microsoft’s services on Yahoo Properties and on Affiliate sites after deduction of the Affiliate sites’ share of revenue and certain Microsoft costs. The Revenue Share Rate was 88 percent for the first five years of the Search Agreement and then increased to 90 percent on February 23, 2015. Pursuant to the Eleventh Amendment, the Revenue Share Rate increased to 93 percent, but Microsoft now receives its 7 percent revenue share before deduction of the Affiliate site’s share of revenue. The Affiliate site’s share of revenue is deducted from the Company’s 93 percent Revenue Share Rate.

Additionally, pursuant to the Eleventh Amendment, The Company has the ability in response to queries on both personal computers and mobile devices to request algorithmic listings only, paid listings only or both algorithmic and paid listings from Microsoft. To the extent the Company requests algorithmic listings only or requests paid listings but elects not to display such paid listings, the Company pays Microsoft serving costs but not a revenue share. In other cases and with respect to the Volume Commitment, the Revenue Share Rate applies.

Previously under the Search Agreement, Yahoo had sales exclusivity for both the Company’s and Microsoft’s premium advertisers. Pursuant to the Eleventh Amendment to the Search Agreement, this sales exclusivity terminated on July 1, 2015. The Company and Microsoft have commenced transitioning premium advertisers for Microsoft’s paid search services to Microsoft on a market-by-market basis. The Eleventh Amendment requires this transition to be completed by January 31, 2016.

The term of the Search Agreement is 10 years from its commencement date, February 23, 2010, subject to earlier termination as provided in the Search Agreement. As of October 1, 2015, either the Company or Microsoft may terminate the Search Agreement by delivering a written notice of termination to the other party. The Search Agreement will remain in effect for four months from the date of the termination notice to provide for a transition period; however, the Company’s Volume Commitment will not apply in the third and fourth months of this transition period.

The Company currently reports as revenue the revenue share it receives from Microsoft under the Search Agreement as the Company is not the primary obligor in the arrangement with the advertisers and publishers as the underlying search advertising services are provided by Microsoft. Approximately 36 percent and 33 percent of the Company’s revenue for the three months ended September 30, 2014 and 2015, respectively, and approximately 36 percent of the Company’s revenue for both the nine months ended September 30, 2014 and 2015 was attributable to the Search Agreement.

As of December 31, 2014 and September 30, 2015, the Company had collected total amounts of $52 million and nil, respectively, on behalf of Microsoft and Microsoft’s affiliates, which was included in cash and cash equivalents with a corresponding liability in accrued expenses and other current liabilities. The Company’s uncollected revenue share in connection with the Search Agreement was $330 million and $280 million, which is included in accounts receivable, net, as of December 31, 2014 and September 30, 2015, respectively.

On December 9, 2010, in connection with entering into the Search Agreement, the Company also entered into a License Agreement with Microsoft (as amended, the “License Agreement”). Under the License Agreement, Microsoft acquired an exclusive 10-year license to the Company’s core search technology and has the ability to integrate this technology into its existing Web search platforms. Pursuant to the Eleventh Amendment, the exclusive licenses granted to Microsoft under the License Agreement became non-exclusive. The Company also agreed pursuant to the Eleventh Amendment to license certain sales tools to Microsoft to use solely in connection with Microsoft’s paid search services pursuant to the terms of the License Agreement.

Subsequent Events

9 Months Ended

Sep. 30, 2015

Subsequent Events

Note 18 Subsequent Events

Google Services Agreement. On October 19, 2015, Yahoo and Google Inc. (“Google”), entered into a Google Services Agreement (the “Services Agreement”). The Services Agreement is effective as of October 1, 2015 and expires on December 31, 2018. Pursuant to the Services Agreement, Google will provide Yahoo with search advertisements through Google’s AdSense for Search Service (“AFS”), web algorithmic search services through Google’s Websearch Service, and image search services. The results provided by Google for these services will be available to Yahoo for display on both desktop and mobile platforms.

Under the Services Agreement, Yahoo is not obligated to send any minimum number of search queries to Google. The Services Agreement is non-exclusive and expressly permits Yahoo to use any other search advertising services, including its own service, the services of Microsoft, or other third parties.

Google will pay Yahoo a percentage of the gross revenues from AFS ads displayed on Yahoo Properties or Affiliate sites. Yahoo will pay Google fees for requests for image search results or web algorithmic search results.

The Services Agreement is subject to regulatory review in the U.S.

The Company And Summary Of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2015
Basis of Presentation	*Basis of Presentation*. The condensed consolidated financial statements include the accounts of Yahoo! Inc. and its majority-owned or otherwise controlled subsidiaries. All intercompany accounts and transactions have been eliminated. Investments in entities in which the Company can exercise significant influence, but does not own a majority equity interest or otherwise control, are accounted for using the equity method and are included as investments in equity interests on the condensed consolidated balance sheets. The Company has included the results of operations of acquired companies from the date of the acquisition. At the beginning of 2015, the Company began classifying editorial costs as cost of revenue — other rather than including such costs in sales and marketing expense. To conform to the current period presentation, the Company reclassified $26 million and $63 million, respectively, in certain website editorial costs previously included in sales and marketing expense to cost of revenue — other for the three and nine months ended September 30, 2014. Also, at the beginning of 2015, the Company began classifying non-data center facilities-related costs within general and administrative expense. To conform to the current period presentation, the Company reclassified $14 million and $39 million, respectively, in facilities-related costs previously included in product development expense and $16 million and $46 million, respectively, previously included in sales and marketing expense to general and administrative expense for the three and nine months ended September 30, 2014. During the six months ended June 30, 2015, the Company identified measurement period adjustments of $11 million to previous purchase accounting estimates for acquisitions, which were primarily related to the finalization of tax and other adjustments. These adjustments were immaterial and applied retrospectively to the acquisition dates. Accordingly, the Company’s condensed consolidated balance sheet as of December 31, 2014 has been updated to reflect the effects of the measurement period adjustments. The accompanying unaudited condensed consolidated interim financial statements reflect all adjustments, consisting of only normal recurring items, which, in the opinion of management, are necessary for a fair statement of the results of operations for the periods shown. The results of operations for such periods are not necessarily indicative of the results expected for the full year or for any future periods. The preparation of consolidated financial statements in conformity with generally accepted accounting principles (“GAAP”) in the United States (“U.S.”) requires management to make estimates, judgments, and assumptions that affect the reported amounts of assets, liabilities, revenue, and expenses and the related disclosure of contingent assets and liabilities. On an ongoing basis, the Company evaluates its estimates, including those related to revenue, the useful lives of long-lived assets including property and equipment and intangible assets, investment fair values, originally developed content, acquired content, stock-based compensation, goodwill, income taxes, contingencies, and restructuring charges. The Company bases its estimates of the carrying value of certain assets and liabilities on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, when these carrying values are not readily available from other sources. Actual results may differ from these estimates. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014, as amended. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted. The condensed consolidated balance sheet as of December 31, 2014 was derived from the Company’s audited financial statements for the year ended December 31, 2014, but does not include all disclosures required by U.S. GAAP. However, the Company believes the disclosures are adequate to make the information presented not misleading.
Cost of revenue - TAC	*Cost of Revenue — TAC*. Traffic acquisition costs (“TAC”) consists of payments made to Affiliates and payments made to companies that direct consumer and business traffic to Yahoo Properties. TAC is either recorded as a reduction of revenue or as cost of revenue—TAC. TAC related to the Company’s Search and Advertising Sales Agreement (as amended, the “Search Agreement”) with Microsoft Corporation (“Microsoft”) is recorded as a reduction of revenue. See Note 17 — “Search Agreement With Microsoft Corporation” for a description of the Search Agreement and License Agreement with Microsoft. The Company also has an agreement to compensate a third party, Mozilla Corporation (“Mozilla”), to make the Company the default search provider on certain of Mozilla’s products in the United States. The Company records these payments as cost of revenue – TAC.
Originally Developed Content and Acquired Content	*Originally Developed Content and Acquired Content.* Originally developed content and acquired content are both carried at cost. Originally developed content is amortized based on the expected pattern of viewing, typically over 18 months. Acquired content is amortized on a straight-line basis over the shorter of each program’s contractual window of availability or estimated period of use, beginning with the month of first availability. Marketing and general and administrative costs are expensed as incurred. For originally developed content, the Company performs regular recoverability assessments on a program-by-program basis. If there are any events or changes in circumstances indicating that the Company should assess whether the fair value of originally developed content is less than its unamortized costs, the Company performs a fair value analysis using an expected cash flow approach. The amount by which the unamortized costs of the originally developed content exceed estimated fair value is charged to expense as an asset impairment. During the three and nine months ended September 30, 2015, the Company recorded an asset impairment charge of $17 million related to originally developed content. For acquired content, the Company compares the net realizable value on a program-by-program basis with the unamortized cost. The amount by which the unamortized costs of the acquired content exceed net realizable value is charged to expense as an asset impairment. During the three and nine months ended September 30, 2015, the Company recorded an asset impairment charge of $25 million related to acquired content, primarily driven by a reduction of forecasted revenues to be generated from advertising on Yahoo Properties.
Recent Accounting Pronouncements	*Recent Accounting Pronouncements*. In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2014-09, “Revenue from Contracts with Customers,” which supersedes the revenue recognition requirements in Topic 605, “Revenue Recognition” and requires entities to recognize revenue in a way that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In August 2015, the FASB issued ASU 2015-14, which defers by one year the effective date of ASU 2014-09. Accordingly, this guidance is effective for interim and annual periods beginning after December 15, 2017 with early adoption permitted for interim and annual periods beginning after December 15, 2016. The Company plans to adopt this guidance on January 1, 2018. The Company is currently evaluating the effects, if any, that the adoption of this guidance will have on the Company’s financial position, results of operations and cash flows. In September 2015, the FASB issued ASU 2015-16, “Business Combinations,” which simplifies the accounting for measurement-period adjustments by eliminating the requirement to restate prior period financial statements for measurement period adjustments. The new guidance requires the cumulative impact of measurement period adjustments, including the impact on prior periods, to be recognized in the reporting period in which the adjustment is identified. The ASU is effective for public companies for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption is permitted for any interim and annual financial statements that have not yet been issued. The Company evaluated the effects of the ASU 2015-16 and elected to early adopt the ASU for the three months ended September 30, 2015. The ASU will be applied prospectively to the acquisitions which require adjustments to the provisional amounts that occurred during the open measurement periods, regardless of the acquisition date.

Marketable Securities, Investments And Fair Value Disclosures (Tables)

9 Months Ended

Sep. 30, 2015

Schedule of Available for Sale Marketable Securities

The following tables summarize the available-for-sale marketable securities (in thousands):


	December 31, 2014
	Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value

Government and agency securities	$	850,712	$	82	$	(792)	$	850,002
Corporate debt securities, commercial paper, time deposits, and bank certificates of deposit		6,711,683		612		(4,653)		6,707,642
Alibaba Group equity securities		2,713,484		37,154,305		-		39,867,789
Hortonworks equity securities		26,246		77,783		-		104,029
Other corporate equity securities		230		430		-		660

Total available-for-sale marketable securities	$	10,302,355	$	37,233,212	$	(5,445)	$	47,530,122


	September 30, 2015
	Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value

Government and agency securities	$	781,223	$	453	$	(31)	$	781,645
Corporate debt securities, commercial paper, time deposits, and bank certificates of deposit		4,759,194		1,616		(1,514)		4,759,296
Alibaba Group equity securities		2,713,484		19,905,369		-		22,618,853
Hortonworks equity securities		26,246		57,939		-		84,185
Other corporate equity securities		230		218		-		448

Total available-for-sale marketable securities	$	8,280,377	$	19,965,595	$	(1,545)	$	28,244,427

Schedule of Available for Sale Marketable Securities by Balance Sheet Location


	December 31,		September 30,
	2014		2015

Reported as:
Short-term marketable securities		5,327,412		4,600,889
Long-term marketable securities		2,230,892		940,052
Investment in Alibaba Group		39,867,789		22,618,853
Other long-term assets and investments		104,029		84,633

Total	$	47,530,122	$	28,244,427

Schedule of Available for Sale Marketable Securities by Contractual Maturities

The remaining contractual maturities of available-for-sale marketable debt securities were as follows (in thousands):


	December 31,		September 30,
	2014		2015

Due within one year	$	5,327,412	$	4,600,889
Due after one year through five years		2,230,892		940,052

Total available-for-sale marketable debt securities	$	7,558,304	$	5,540,941

Available for Sale Marketable Securities in Unrealized Loss Position


	December 31, 2014
	Less than 12 Months				12 Months or Longer				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Loss		Value		Loss		Value		Loss

Government and agency securities	$	744,948	$	(792)	$	-	$	-	$	744,948	$	(792)
Corporate debt securities, commercial paper, and bank certificates of deposit		2,601,288		(4,646)		3,234		(7)		2,604,522		(4,653)

Total available-for-sale marketable debt securities	$	3,346,236	$	(5,438)	$	3,234	$	(7)	$	3,349,470	$	(5,445)


	September 30, 2015
	Less than 12 Months				12 Months or Longer				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Loss		Value		Loss		Value		Loss

Government and agency securities	$	67,270	$	(31)	$	-	$	-	$	67,270	$	(31)
Corporate debt securities, commercial paper, and bank certificates of deposit		1,497,672		(1,513)		2,899		(1)		1,500,571		(1,514)

Total available-for-sale marketable debt securities	$	1,564,942	$	(1,544)	$	2,899	$	(1)	$	1,567,841	$	(1,545)

Schedule of Fair Value of Financial Assets and Liabilities Measured on Recurring Basis

The following table sets forth the financial assets and liabilities, measured at fair value, by level within the fair value hierarchy as of December 31, 2014 (in thousands):


	Fair Value Measurements at Reporting Date Using
Assets	Level 1		Level 2		Level 3		Total

Money market funds⁽¹⁾	$	373,822	$	-	$	-	$	373,822
Available-for-sale marketable debt securities:
Government and agency securities⁽¹⁾		-		850,002		-		850,002
Commercial paper and bank certificates of deposit⁽¹⁾		-		3,602,321		-		3,602,321
Corporate debt securities⁽¹⁾		-		3,327,017		-		3,327,017
Time deposits⁽¹⁾		-		1,361,165		-		1,361,165
Available-for-sale equity securities:
Other corporate equity securities⁽²⁾		660		-		-		660
Alibaba Group equity securities		39,867,789		-		-		39,867,789
Hortonworks equity securities⁽²⁾		104,029		-		-		104,029
Hortonworks warrants		-		-		98,062		98,062
Foreign currency derivative contracts⁽³⁾		-		202,928		-		202,928

Financial assets at fair value	$	40,346,300	$	9,343,433	$	98,062	$	49,787,795
Liabilities
Foreign currency derivative contracts⁽³⁾		-		(6,157)		-		(6,157)

Total financial assets and liabilities at fair value	$	40,346,300	$	9,337,276	$	98,062	$	49,781,638

The following table sets forth the financial assets and liabilities, measured at fair value, by level within the fair value hierarchy as of September 30, 2015 (in thousands):


	Fair Value Measurements at Reporting Date Using
Assets	Level 1		Level 2		Level 3		Total

Money market funds⁽¹⁾	$	177,280	$	-	$	-	$	177,280
Available-for-sale marketable debt securities:
Government and agency securities⁽¹⁾		-		781,645		-		781,645
Commercial paper and bank certificates of deposit⁽¹⁾		-		1,835,483		-		1,835,483
Corporate debt securities⁽¹⁾		-		2,973,809		-		2,973,809
Time deposits⁽¹⁾		-		58,420		-		58,420
Available-for-sale equity securities:
Other corporate equity securities ⁽²⁾		448		-		-		448
Alibaba Group equity securities		22,618,853		-		-		22,618,853
Hortonworks equity securities⁽²⁾		84,185		-		-		84,185
Hortonworks warrants		-		-		78,820		78,820
Foreign currency derivative contracts⁽³⁾		-		111,080		-		111,080

Financial assets at fair value	$	22,880,766	$	5,760,437	$	78,820	$	28,720,023
Liabilities
Foreign currency derivative contracts⁽³⁾		-		(10,287)		-		(10,287)

Total financial assets and liabilities at fair value	$	22,880,766	$	5,750,150	$	78,820	$	28,709,736

(2) The Hortonworks equity securities and other corporate equity securities are classified as part of other long-term assets and investments on the condensed consolidated balance sheets.

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References+ Details

Consolidated Financial Statement Details (Tables)

9 Months Ended

Sep. 30, 2015

Accumulated Other Comprehensive Income

The components of accumulated other comprehensive income were as follows (in thousands):


	December 31,		September 30,
	2014		2015

Unrealized gains on available-for-sale securities, net of tax	$	22,084,960	$	11,859,192
Unrealized gains (losses) on cash flow hedges, net of tax		1,856		(1,858)
Foreign currency translation, net of tax		(67,188)		(422,881)

Accumulated other comprehensive income	$	22,019,628	$	11,434,453

Noncontrolling Interests

Noncontrolling interests were as follows (in thousands):


	December 31,		September 30,
	2014		2015

Beginning noncontrolling interests	$	55,688	$	43,755
Distributions to noncontrolling interests		(22,344)		(15,847)
Net income attributable to noncontrolling interests		10,411		5,215

Ending noncontrolling interests	$	43,755	$	33,123

Other Income (Expense), Net

Other income (expense), net was as follows (in thousands):


	Three Months Ended				Nine Months Ended
	September 30,		September 30,		September 30,		September 30,
	2014		2015		2014		2015

Interest, dividend and investment income	$	5,148	$	8,010	$	16,180	$	24,888
Interest expense		(17,292)		(18,411)		(51,461)		(53,540)
Gain on sale of Alibaba Group ADSs		10,319,437		-		10,319,437		-
Loss on Hortonworks warrants		-		(12,782)		-		(19,241)
Foreign exchange losses		(2,109)		(1,490)		(9,048)		(21,017)
Other		3,747		718		6,781		2,151

Total other income (expense), net	$	10,308,931	$	(23,955)	$	10,281,889	$	(66,759)

Reclassifications Out of Accumulated Other Comprehensive Income

Reclassifications out of accumulated other comprehensive income for the three months ended September 30, 2014 and 2015 were as follows (in thousands):


	Three Months Ended
	September 30,		September 30,
	2014		2015
	Reclassified from		Reclassified from
	Accumulated		Accumulated
	Other		Other
	Comprehensive		Comprehensive		Affected Line Item in the
	Income		Income		Statement of Operations

Realized (gains) losses on cash flow hedges, net of tax	$	(854)	$	869	Revenue
Realized (gains) losses on available-for-sale securities, net of tax		(2,044)		72	Other income (expense), net
Foreign currency translation adjustments (“CTA”):
Disposal of a portion of the investment in Alibaba Group, net of $30 million in tax		(50,301)		-	Other income (expense), net

Total reclassifications for the period	$	(53,199)	$	941



Reclassifications out of accumulated other comprehensive income for the nine months ended September 30, 2014 and 2015 were as follows (in thousands):
	Nine Months Ended
	September 30,		September 30,
	2014		2015
	Reclassified from		Reclassified from
	Accumulated		Accumulated
	Other		Other
	Comprehensive		Comprehensive		Affected Line Item in the
	Income		Income		Statement of Operations

Realized (gains) losses on cash flow hedges, net of tax	$	(1,594)	$	3,007	Revenue
Realized (gains) losses on available-for-sale securities, net of tax		(2,165)		74	Other income (expense), net
Foreign currency translation adjustments (“CTA”):
Disposal of a portion of the investment in Alibaba Group, net of $30 million in tax		(50,301)		-	Other income (expense), net

Total reclassifications for the period	$	(54,060)	$	3,081

Acquisitions and Dispositions (Tables)

9 Months Ended

Sep. 30, 2015

Flurry, Inc.

Allocation of Purchase Price of Assets Acquired And Liabilities Assumed

The allocation of the purchase price of the assets acquired and liabilities assumed based on their estimated fair values was as follows (in thousands):




Cash acquired	$	12,139
Other tangible assets acquired		51,235
Amortizable intangible assets:
Developed technology		7,100
Customer contracts and related relationships		47,600
Other		720
Goodwill		194,081

Total assets acquired		312,875
Liabilities assumed		(43,205)

Total	$	269,670

Polyvore, Inc.

Allocation of Purchase Price of Assets Acquired And Liabilities Assumed

The preliminary allocation of the purchase price of the assets acquired and liabilities assumed based on their estimated fair values was as follows (in thousands):




Cash acquired	$	5,923
Other tangible assets acquired		12,057
Amortizable intangible assets:
Developed technology		17,550
Tradename		1,150
Customer contracts and related relationships		225
Goodwill		131,180

Total assets acquired		168,085
Liabilities assumed		(7,503)

Total	$	160,582

Goodwill (Tables)

9 Months Ended

Sep. 30, 2015

Schedule Of Goodwill

The changes in the carrying amount of goodwill for the nine months ended September 30, 2015 were as follows (in thousands):


	Americas⁽¹⁾		EMEA⁽²⁾		Asia Pacific⁽³⁾		Total

Net balance as of January 1, 2015	$	4,322,219	$	532,469	$	297,882	$	5,152,570
Acquisitions and related adjustments		130,303		20,312		-		150,615
Foreign currency translation adjustments		(2,803)		(25,873)		(7,915)		(36,591)

Net balance as of September 30, 2015	$	4,449,719	$	526,908	$	289,967	$	5,266,594

(1)	Gross goodwill balance for the Americas segment was $4.4 billion as of September 30, 2015.

(2)	Gross goodwill balance for the EMEA segment was $1.2 billion as of September 30, 2015. The EMEA segment includes accumulated impairment losses of $630 million as of September 30, 2015.

(3)	Gross goodwill balance for the Asia Pacific segment was $449 million as of September 30, 2015. The Asia Pacific segment includes accumulated impairment losses of $159 million as of September 30, 2015.

Intangible Assets, Net (Tables)

9 Months Ended

Sep. 30, 2015

Intangible Assets, Net

The following table summarizes the Company’s intangible assets, net (in thousands):


	December 31, 2014		September 30, 2015

	Net		Gross Carrying Amount		Accumulated Amortization^(*)		Net

Customer, affiliate, and advertiser related relationships	$	281,596	$	370,314	$	(133,107)	$	237,207
Developed technology and patents		122,674		209,385		(107,981)		101,404
Tradenames, trademarks, and domain names		66,572		109,089		(50,519)		58,570

Total intangible assets, net	$	470,842	$	688,788	$	(291,607)	$	397,181

(*)	Cumulative foreign currency translation adjustments, reflecting movement in the currencies of the underlying entities, totaled approximately $17 million as of September 30, 2015.

Basic And Diluted Net Income Attributable To Yahoo! Inc. Common Stockholders Per Share (Tables)

9 Months Ended

Sep. 30, 2015

Computation of Basic and Diluted Net Income Per Share

The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share amounts):


	Three Months Ended				Nine Months Ended
	September 30,		September 30,		September 30,		September 30,
	2014		2015		2014		2015

*Basic:*
Numerator:
Net income attributable to Yahoo! Inc.	$	6,774,102	$	76,261	$	7,355,387	$	75,905
Less: Net income allocated to participating securities		(61)		-		(66)		-

Net income attributable to Yahoo! Inc. common stockholders — basic	$	6,774,041	$	76,261	$	7,355,321	$	75,905

Denominator:
Weighted average common shares		993,543		940,822		1,001,066		937,713

Net income attributable to Yahoo! Inc. common stockholders per share — basic	$	6.82	$	0.08	$	7.35	$	0.08

*Diluted:*
Numerator:
Net income attributable to Yahoo! Inc.	$	6,774,102	$	76,261	$	7,355,387	$	75,905
Less: Net income allocated to participating securities		(60)		-		(65)		-
Less: Effect of dilutive securities issued by equity investees		(20,705)		(1,112)		(42,491)		(3,431)

Net income attributable to Yahoo! Inc. common stockholders — diluted	$	6,753,337	$	75,149	$	7,312,831	$	72,474

Denominator:
Denominator for basic calculation		993,543		940,822		1,001,066		937,713
Weighted average effect of Yahoo! Inc. dilutive securities:
Restricted stock units		10,638		4,551		12,388		5,155
Stock options and employee stock purchase plan		3,512		1,561		4,481		1,292

Denominator for diluted calculation		1,007,693		946,934		1,017,935		944,160

Net income attributable to Yahoo! Inc. common stockholders per share — diluted	$	6.70	$	0.08	$	7.18	$	0.08

Investments In Equity Interests Using The Equity Method Of Accounting (Tables)

9 Months Ended

Sep. 30, 2015

Investments in Equity Interests Using Equity Method of Accounting

The following table summarizes the Company’s investments in equity interests using the equity method of accounting (dollars in thousands):


	December 31,		Percent		September 30,		Percent
	2014		Ownership		2015		Ownership

Yahoo Japan	$	2,482,660		35.5%	$	2,326,486		35.5%
Other		6,918		20%		6,577		20%

Total	$	2,489,578			$	2,333,063

Yahoo Japan

Condensed Financial Information


	Three Months Ended				Nine Months Ended
	June 30,		June 30,		June 30,		June 30,
	2014		2015		2014		2015

	(in thousands)
Operating data:
Revenue	$	963,796	$	911,735	$	3,050,516	$	2,840,393
Gross profit	$	761,802	$	712,561	$	2,466,986	$	2,254,511
Income from operations	$	485,164	$	402,865	$	1,452,551	$	1,266,084
Net income	$	321,534	$	274,567	$	942,675	$	836,081
Net income attributable to Yahoo Japan	$	318,571	$	273,636	$	934,098	$	832,611


	September 30,		June 30,
	2014		2015

	(in thousands)
Balance sheet data:
Current assets	$	6,161,126	$	5,729,119
Long-term assets	$	1,908,379	$	2,198,578
Current liabilities	$	1,948,540	$	1,800,500
Long-term liabilities	$	35,418	$	239,240
Noncontrolling interests	$	66,998	$	163,216

Foreign Currency Derivative Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2015

Notional Amounts of Company's Outstanding Derivative Contracts

Notional amounts of the Company’s outstanding derivative contracts were as follows (in millions):


	December 31,		September 30,
	2014		2015

Derivatives designated as hedging instruments:
Net investment hedge forward and option contracts	$	1,647	$	1,502
Cash flow hedge forwards	$	222	$	122
Derivatives not designated as hedging instruments:
Balance sheet hedges	$	243	$	257

Foreign Currency Derivative Activity

Foreign currency derivative activity for the nine months ended September 30, 2014 was as follows (in millions):


	Beginning Fair Value		Settlement Payment (Receipt)			Gain (Loss) Recorded in Other Income (Expense), Net			Gain (Loss) Recorded in Other Comprehensive Income (Loss)			Gain (Loss) Recorded in Revenue		Ending Fair Value

Derivatives designated as hedging instruments:
Net investment hedges	$	209	$	(178	)	$	-		$	78	(*)	$	-	$	109
Cash flow hedges	$	4	$	(2	)	$	(1	)	$	(1)		$	4	$	4
Derivatives not designated as hedging instruments:
Balance sheet hedges	$	-	$	(1	)	$	11		$	-		$	-	$	10

Foreign currency derivative activity for the nine months ended September 30, 2015 was as follows (in millions):


	Beginning Fair Value		Settlement Payment (Receipt)			Gain (Loss) Recorded in Other Income (Expense), Net			Gain (Loss) Recorded in Other Comprehensive Income (Loss)			Gain (Loss) Recorded in Revenue			Ending Fair Value

Derivatives designated as hedging instruments:
Net investment hedges	$	185	$	(92	)	$	1		$	7	(*)	$	-		$	101
Cash flow hedges	$	8	$	(1	)	$	(1	)	$	(3)		$	(2	)	$	1
Derivatives not designated as hedging instruments:
Balance sheet hedges	$	4	$	(22	)	$	17		$	-		$	-		$	(1	)

Foreign Currency Derivative Contracts Balance Sheet Location and Ending Fair Value

Foreign currency derivative contracts balance sheet location and ending fair value was as follows (in millions):


	Balance Sheet	December 31,		September 30,
	Location	2014		2015

Derivatives designated as hedging instruments:

Net investment hedges	Asset⁽¹⁾	$	190	$	107

	Liability⁽²⁾	$	(5)	$	(6)

Cash flow hedges	Asset⁽¹⁾	$	8	$	2

	Liability⁽²⁾	$	-	$	(1)



Derivatives not designated as hedging instruments:

Balance sheet hedges	Asset⁽¹⁾	$	5	$	2

	Liability⁽²⁾	$	(1)	$	(3)

(1)	Included in prepaid expenses and other current assets or other long-term assets and investments on the condensed consolidated balance sheets.

(2)	Included in accrued expenses and other current liabilities or other long-term liabilities on the condensed consolidated balance sheets.

Convertible Notes (Tables)

9 Months Ended

Sep. 30, 2015

Schedule of Notes

The Notes consist of the following (in thousands):


	December 31, 2014		September 30, 2015

Liability component:
Principal	$	1,437,500	$	1,437,500
Less: note discount		(267,077)		(220,092)

Net carrying amount	$	1,170,423	$	1,217,408

Equity component ^(*)	$	305,569	$	305,569

(*)	Recorded on the condensed consolidated balance sheets within additional paid-in capital.

Interest Expense Recognized Related To Notes

The following table sets forth total interest expense recognized related to the Notes (in thousands):


	Three Months Ended				Nine Months Ended
	September 30, 2014		September 30, 2015		September 30, 2014		September 30, 2015

Accretion of convertible note discount	$	15,056	$	15,867	$	44,583	$	46,984

Fair Value and Carrying Value of Notes

The estimated fair value of the Notes, which was determined based on inputs that are observable in the market (Level 2) was as follows (in thousands):


	December 31, 2014				September 30, 2015
	Fair Value		Carrying Value		Fair Value		Carrying Value

Convertible senior notes	$	1,175,240	$	1,170,423	$	1,248,922	$	1,217,408

Commitments And Contingencies (Tables)

9 Months Ended

Sep. 30, 2015

Lease Commitments

A summary of gross and net lease commitments as of September 30, 2015 was as follows (in millions):


	Gross Operating Lease Commitments		Sublease Income		Net Operating Lease Commitments

Three months ending December 31, 2015	$	29	$	(4)	$	25
Years ending December 31,
2016	$	107	$	(12)	$	95
2017	$	80	$	(9)	$	71
2018	$	56	$	(7)	$	49
2019	$	45	$	(5)	$	40
2020	$	31	$	(2)	$	29
Due after 5 years	$	84	$	(4)	$	80

Total gross and net lease commitments	$	432	$	(43)	$	389

Capital Lease Commitment


	Capital Lease Commitments

Three months ending December 31, 2015	$	6
Years ending December 31,
2016		15
2017		10
2018		9
2019		5
2020		-
Due after 5 years		-

Gross capital lease commitments		45
Less: interest		8

Net capital lease commitments included in other accrued expenses and current liabilities and other long-term liabilities	$	37

- Definition

Tabular disclosure of a lessee's leasing arrangements including: (1) the basis on which contingent rental payments are determined, (2) the existence and terms of renewal or purchase options and escalation clauses, (3) restrictions imposed by lease arrangements, such as those concerning dividends, additional debt, and further leasing, (4) rent holidays, rent concessions, or leasehold improvement incentives and unusual provisions or conditions. Disclosure may also include the specific period used to amortize material leasehold improvements made at the inception of the lease or during the lease term. Additionally, for operating leases having initial or remaining noncancelable lease terms in excess of one year: (a) future minimum rental payments required as of the date of the latest balance sheet presented, in the aggregate and for each of the five succeeding fiscal years, (b) the total of minimum rentals to be received in the future under noncancelable subleases as of the date of the latest balance sheet presented, and (c) for all operating leases, rental expense for each period for which an income statement is presented, with separate amounts for minimum rentals, contingent rentals, and sublease rentals. Rental payments under leases with terms of a month or less that were not renewed need not be included.

+ References+ Details

Stockholders' Equity And Employee Benefits (Tables)

9 Months Ended

Sep. 30, 2015

Schedule of Stock Option Activity

Stock option activity under the Company’s Plans for the nine months ended September 30, 2015 is summarized as follows (in thousands, except per share amounts):


	Shares		Weighted Average Exercise Price Per Share

Outstanding at December 31, 2014⁽¹⁾		9,225	$	18.57
Options granted		-	$	-
Options assumed in acquisitions		407	$	11.89
Options exercised⁽²⁾		(1,709)	$	16.59
Options expired		(579)	$	19.11
Options cancelled/forfeited		(313)	$	19.89

Outstanding at September 30, 2015⁽¹⁾		7,031	$	18.56

⁽¹⁾	Includes shares subject to performance-based stock options for which performance goals had not been set as of the date shown.

⁽²⁾	The Company generally issues new shares to satisfy stock option exercises.

Schedule of Weighted Average Assumptions Used to Calculate Fair Value of Options Granted Including Assumed Options from Acquisitions

The fair value of option grants, including assumed options from acquisitions, was determined using the Black-Scholes option pricing model with the following weighted average assumptions:


	Stock Options		Stock Options		Stock Options		Stock Options
	Three Months Ended		Three Months Ended		Nine Months Ended		Nine Months Ended
	September 30,		September 30,		September 30,		September 30,
	2014		2015		2014		2015

Expected dividend yield		0.0%		0.0%		0.0%		0.0%
Risk-free interest rate		1.1%		0.9%		1.3%		0.9%
Expected volatility		32.7%		34.5%		35.8%		34.5%
Expected life (in years)		3.30		2.5		3.77		2.5

Schedule of Restricted Stock Units Activity


	Shares		Weighted Average Grant Date Fair Value Per Share

Awarded and unvested at December 31, 2014⁽¹⁾		40,677	$	32.38
Granted⁽²⁾		14,799	$	42.37
Assumed in acquisitions		-	$	-
Vested		(13,844)	$	28.30
Forfeited		(9,918)	$	32.93

Awarded and unvested at September 30, 2015⁽¹⁾		31,714	$	38.66

⁽¹⁾	Includes the maximum number of shares issuable under the Company’s performance-based restricted stock unit awards (including future-year tranches for which performance goals had not been set) as of the date shown.

⁽²⁾

Restructuring Charges, Net (Tables)

9 Months Ended

Sep. 30, 2015

Restructuring Charges, Net

Restructuring charges, net was comprised of the following (in thousands):


	Three Months Ended				Nine Months Ended
	September 30,		September 30,		September 30,		September 30,
	2014		2015		2014		2015

Employee severance pay and related costs	$	4,086	$	16,597	$	7,759	$	67,746
Non-cancelable lease, contract termination, and other charges		4,545		11,103		72,983		33,123
Reversals of previous charges		(161)		(2,590)		(3,133)		(6,611)
Non-cash accelerations of stock-based compensation expense		-		-		-		2,705
Other non-cash charges (credits)		-		902		(7,031)		(31)

Restructuring charges, net	$	8,470	$	26,012	$	70,578	$	96,932

Restructuring Accrual Activity

The Company’s restructuring accrual activity for the nine months ended September 30, 2015 is summarized as follows (in thousands):



Accrual balance as of December 31, 2014	$	83,608
Restructuring charges		96,932
Cash paid		(102,657)
Non-cash accelerations of stock-based compensation expense		(2,705)
Foreign currency translation and other adjustments		(910)

Accrual balance as of September 30, 2015	$	74,268

Restructuring Accrual by Reportable Segment

The restructuring accrual by reportable segment consisted of the following (in thousands):


	December 31, 2014		September 30, 2015

Americas	$	65,949	$	51,891
EMEA		16,797		22,372
Asia Pacific		862		5

Total restructuring accruals	$	83,608	$	74,268

Segments (Tables)

9 Months Ended

Sep. 30, 2015

Segment Information

The following tables present summarized information by segment (in thousands):


	Three Months Ended				Nine Months Ended
	September 30,		September 30,		September 30,		September 30,
	2014		2015		2014		2015

Revenue by segment:
Americas	$	873,306	$	987,374	$	2,545,769	$	2,964,305
EMEA		89,058		79,614		278,475		246,530
Asia Pacific		185,776		158,685		540,817		484,073

Total Revenue	$	1,148,140	$	1,225,673	$	3,365,061	$	3,694,908

TAC by segment:
Americas	$	42,607	$	201,855	$	106,997	$	549,332
EMEA		7,980		12,745		27,385		37,399
Asia Pacific		3,593		8,629		9,533		19,867

Total TAC	$	54,180	$	223,229	$	143,915	$	606,598

Revenue ex-TAC by segment:
Americas	$	830,699	$	785,519	$	2,438,772	$	2,414,973
EMEA		81,078		66,869		251,090		209,131
Asia Pacific		182,183		150,056		531,284		464,206

Total Revenue ex-TAC		1,093,960		1,002,444		3,221,146		3,088,310

Direct costs by segment⁽¹⁾ :
Americas		66,516		84,582		213,000		240,406
EMEA		23,166		23,196		66,505		63,947
Asia Pacific		53,954		47,214		148,921		149,764
Global operating costs⁽²⁾		646,042		603,215		1,903,194		1,916,240
Gain on sales of patents		(1,300)		-		(62,800)		(11,100)
Asset impairment charge		-		41,699		-		41,699
Restructuring charges, net		8,470		26,012		70,578		96,932
Depreciation and amortization		149,144		152,412		453,538		457,630
Stock-based compensation expense		105,796		110,426		317,422		351,252

Income (loss) from operations	$	42,172	$	(86,312)	$	110,788	$	(218,460)

(1)

(2)

Capital Expenditures by Segment


	Three Months Ended				Nine Months Ended
	September 30,		September 30,		September 30,		September 30,
	2014		2015		2014		2015

Capital expenditures, net:
Americas	$	105,437	$	139,796	$	269,754	$	401,984
EMEA		3,034		4,616		22,070		19,265
Asia Pacific		3,783		5,969		12,443		19,495

Total capital expenditures, net	$	112,254	$	150,381	$	304,267	$	440,744

Property and Equipment Net


	December 31,		September 30,
	2014		2015

Property and equipment, net:
Americas:
U.S.	$	1,382,597	$	1,494,905
Other		787		495

Total Americas	$	1,383,384	$	1,495,400

EMEA		34,649		31,710
Asia Pacific		69,651		63,329

Total property and equipment, net	$	1,487,684	$	1,590,439

Enterprise Wide Disclosures Revenues for Groups of Similar Services

The following table presents revenue for groups of similar services (in thousands):


	Three Months Ended				Nine Months Ended
	September 30,		September 30,		September 30,		September 30,
	2014		2015		2014		2015

Search	$	452,355	$	509,478	$	1,325,540	$	1,562,270
Display		446,980		508,617		1,336,257		1,472,726
Other		248,805		207,578		703,264		659,912

Total revenue	$	1,148,140	$	1,225,673	$	3,365,061	$	3,694,908


	Three Months Ended				Nine Months Ended
	September 30,		September 30,		September 30,		September 30,
	2014		2015		2014		2015

Revenue:
U.S.	$	839,080	$	958,394	$	2,444,696	$	2,887,134
International		309,060		267,279		920,365		807,774

Total revenue	$	1,148,140	$	1,225,673	$	3,365,061	$	3,694,908

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References+ Details

Company and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2015	Sep. 30, 2015 Originally Developed Content	Sep. 30, 2015 Originally Developed Content	Sep. 30, 2015 Acquired Content	Sep. 30, 2015 Acquired Content	Sep. 30, 2014 Editorial costs Cost of revenue - other	Sep. 30, 2014 Editorial costs Cost of revenue - other	Sep. 30, 2014 Editorial costs Sales and marketing	Sep. 30, 2014 Editorial costs Sales and marketing	Sep. 30, 2014 Facilities-related costs previously included in product development expense General and administrative	Sep. 30, 2014 Facilities-related costs previously included in product development expense General and administrative	Sep. 30, 2014 Facilities-related costs previously included in product development expense Product development	Sep. 30, 2014 Facilities-related costs previously included in product development expense Product development	Sep. 30, 2014 Facilities-related costs previously included in sales and marketing expense Sales and marketing	Sep. 30, 2014 Facilities-related costs previously included in sales and marketing expense Sales and marketing	Sep. 30, 2014 Facilities-related costs previously included in sales and marketing expense General and administrative	Sep. 30, 2014 Facilities-related costs previously included in sales and marketing expense General and administrative
Organization and Summary of Significant Accounting Policies [Line Items]
Prior period reclassification adjustment								$ 26,000,000	$ 63,000,000	$ (26,000,000)	$ (63,000,000)	$ 14,000,000	$ 39,000,000	$ (14,000,000)	$ (39,000,000)	$ (16,000,000)	$ (46,000,000)	$ 16,000,000	$ 46,000,000
Adjustments to previous purchase accounting estimates for acquisitions, tax and other adjustments		11,000,000
Amortization period					18 months
Asset impairment charge	$ 41,699,000		$ 41,699,000	$ 17,000,000	$ 17,000,000	$ 25,000,000	$ 25,000,000

Available for Sale Marketable Securities (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Cost Basis	$ 8,280,377	$ 10,302,355
Gross Unrealized Gains	19,965,595	37,233,212
Gross Unrealized Losses	(1,545)	(5,445)
Estimated Fair Value, Total available-for-sale marketable securities	28,244,427	47,530,122
Government and agency securities
Schedule of Available-for-sale Securities [Line Items]
Cost Basis	781,223	850,712
Gross Unrealized Gains	453	82
Gross Unrealized Losses	(31)	(792)
Estimated Fair Value, Total available-for-sale marketable securities	781,645	850,002
Corporate Debt Securities, Commercial Paper, Time Deposits, And Bank Certificates Of Deposit
Schedule of Available-for-sale Securities [Line Items]
Cost Basis	4,759,194	6,711,683
Gross Unrealized Gains	1,616	612
Gross Unrealized Losses	(1,514)	(4,653)
Estimated Fair Value, Total available-for-sale marketable securities	4,759,296	6,707,642
Corporate Equity Securities \| Alibaba Group
Schedule of Available-for-sale Securities [Line Items]
Cost Basis	2,713,484	2,713,484
Gross Unrealized Gains	19,905,369	37,154,305
Estimated Fair Value, Total available-for-sale marketable securities	22,618,853	39,867,789
Corporate Equity Securities \| Hortonworks, Inc
Schedule of Available-for-sale Securities [Line Items]
Cost Basis	26,246	26,246
Gross Unrealized Gains	57,939	77,783
Estimated Fair Value, Total available-for-sale marketable securities	84,185	104,029
Corporate Equity Securities \| Other corporate equity securities
Schedule of Available-for-sale Securities [Line Items]
Cost Basis	230	230
Gross Unrealized Gains	218	430
Estimated Fair Value, Total available-for-sale marketable securities	$ 448	$ 660

Available for Sale Marketable Securities by Balance Sheet Location (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Short-term marketable securities	$ 4,600,889	$ 5,327,412
Long-term marketable securities	940,052	2,230,892
Investment in Alibaba Group	22,618,853	39,867,789
Other long-term assets and investments	84,633	104,029
Total	$ 28,244,427	$ 47,530,122

- Definition

Investments in debt and equity securities which are categorized neither as held-to-maturity nor trading and which are intended to be sold or mature more than one year from the balance sheet date or operating cycle, if longer. Such securities are reported at fair value; unrealized gains (losses) related to Available-for-sale Securities are excluded from earnings and reported in a separate component of shareholders' equity (other comprehensive income), unless the Available-for-sale security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding gain (loss) of an Available-for-sale security that is designated as being hedged in a fair value hedge is recognized in earnings during the period of the hedge, as are other than temporary declines in fair value below the cost basis for investments in equity securities and debt securities that an entity intends to sell or it is more likely than not that it will be required to sell before the recovery of its amortized cost basis. Other than temporary declines in fair value below the cost basis for debt securities categorized as Available-for-sale that an entity does not intend to sell and for which it is not more likely than not that the entity will be required to sell before the recovery of its amortized cost basis are bifurcated into credit losses and losses related to all other factors. Other than temporary declines in fair value below cost basis related to credit losses are recognized in earnings, and losses related to all other factors are recognized in other comprehensive income.

+ References+ Details

Marketable Securities Investments and Fair Value Disclosures - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Investments [Line Items]
Cash and cash equivalents	$ 1,281,160,000	$ 1,281,160,000	$ 2,664,098,000	$ 10,345,285,000	$ 2,077,590,000
Loss on Hortonworks warrants	(12,782,000)	(19,241,000)
Other income (expense), net
Investments [Line Items]
Loss on Hortonworks warrants	(12,782,000)	(19,241,000)
Cash deposited with commercial banks
Investments [Line Items]
Cash and cash equivalents	995,000,000	995,000,000	702,000,000
Cash and Cash Equivalents
Investments [Line Items]
Short-term investments	286,000,000	286,000,000	2,000,000,000
Other long-term assets and investments
Investments [Line Items]
Other investments held at cost	83,000,000	83,000,000	82,000,000
Convertible Senior Notes
Investments [Line Items]
Principal amount					1,437,500,000
Convertible senior notes percent	0.00%	0.00%			0.00%
Maturity date, convertible senior note		Dec. 01, 2018
Fair Value Measurements At Reporting Date Using Total \| Hortonworks, Inc
Investments [Line Items]
Warrants	78,820,000	78,820,000	98,062,000
Fair Value Measurements At Reporting Date Using Level 2 \| Convertible Senior Notes
Investments [Line Items]
Fair value of the convertible senior notes	$ 1,248,922,000	$ 1,248,922,000	$ 1,175,240,000

Available for Sale Securities by Contractual Maturities (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Due within one year	$ 4,600,889	$ 5,327,412
Due after one year through five years	940,052	2,230,892
Total available-for-sale marketable debt securities	$ 5,540,941	$ 7,558,304

Available for Sale Marketable Debt Securities in Unrealized Loss Position (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	$ 1,564,942	$ 3,346,236
Less than 12 Months, Unrealized Loss	(1,544)	(5,438)
12 Months or Longer, Fair Value	2,899	3,234
12 Months or Longer, Unrealized Loss	(1)	(7)
Total, Fair Value	1,567,841	3,349,470
Total, Unrealized Loss	(1,545)	(5,445)
Government and agency securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	67,270	744,948
Less than 12 Months, Unrealized Loss	(31)	(792)
Total, Fair Value	67,270	744,948
Total, Unrealized Loss	(31)	(792)
Corporate Debt Securities, Commercial Paper, and Bank Certificates of Deposit
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	1,497,672	2,601,288
Less than 12 Months, Unrealized Loss	(1,513)	(4,646)
12 Months or Longer, Fair Value	2,899	3,234
12 Months or Longer, Unrealized Loss	(1)	(7)
Total, Fair Value	1,500,571	2,604,522
Total, Unrealized Loss	$ (1,514)	$ (4,653)

Fair Value of Financial Assets and Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified

Sep. 30, 2015

Dec. 31, 2014

Fair Value Measurements At Reporting Date Using Level 1

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Financial assets at fair value

$ 22,880,766

$ 40,346,300

Total financial assets and liabilities at fair value

22,880,766

40,346,300

Fair Value Measurements At Reporting Date Using Level 1 | Money Market Funds

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Money market funds

177,280

^[1]

373,822

^[1]

Fair Value Measurements At Reporting Date Using Level 1 | Corporate Equity Securities | Other corporate equity securities

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Available-for-sale securities

448

^[2]

660

^[2]

Fair Value Measurements At Reporting Date Using Level 1 | Corporate Equity Securities | Alibaba Group

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Available-for-sale securities

22,618,853

39,867,789

Fair Value Measurements At Reporting Date Using Level 1 | Corporate Equity Securities | Hortonworks, Inc

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Available-for-sale securities

84,185

^[2]

104,029

^[2]

Fair Value Measurements At Reporting Date Using Level 2

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Financial assets at fair value

5,760,437

9,343,433

Total financial assets and liabilities at fair value

5,750,150

9,337,276

Fair Value Measurements At Reporting Date Using Level 2 | Government and agency securities

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Available-for-sale securities

781,645

^[1]

850,002

^[1]

Fair Value Measurements At Reporting Date Using Level 2 | Commercial Paper And Bank Certificates Of Deposit

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Available-for-sale securities

1,835,483

^[1]

3,602,321

^[1]

Fair Value Measurements At Reporting Date Using Level 2 | Corporate Debt Securities

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Available-for-sale securities

2,973,809

^[1]

3,327,017

^[1]

Fair Value Measurements At Reporting Date Using Level 2 | Time Deposits

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Available-for-sale securities

58,420

^[1]

1,361,165

^[1]

Fair Value Measurements At Reporting Date Using Level 2 | Foreign Currency Derivative Contracts

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Foreign currency derivative contracts, assets

111,080

^[3]

202,928

^[3]

Foreign currency derivative contracts, liabilities

(10,287)

^[3]

(6,157)

^[3]

Fair Value Measurements At Reporting Date Using Level 3

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Financial assets at fair value

78,820

98,062

Total financial assets and liabilities at fair value

78,820

98,062

Fair Value Measurements At Reporting Date Using Level 3 | Hortonworks, Inc

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Warrants

78,820

98,062

Fair Value Measurements At Reporting Date Using Total

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Financial assets at fair value

28,720,023

49,787,795

Total financial assets and liabilities at fair value

28,709,736

49,781,638

Fair Value Measurements At Reporting Date Using Total | Hortonworks, Inc

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Warrants

78,820

98,062

Fair Value Measurements At Reporting Date Using Total | Money Market Funds

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Money market funds

177,280

^[1]

373,822

^[1]

Fair Value Measurements At Reporting Date Using Total | Government and agency securities

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Available-for-sale securities

781,645

^[1]

850,002

^[1]

Fair Value Measurements At Reporting Date Using Total | Commercial Paper And Bank Certificates Of Deposit

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Available-for-sale securities

1,835,483

^[1]

3,602,321

^[1]

Fair Value Measurements At Reporting Date Using Total | Corporate Debt Securities

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Available-for-sale securities

2,973,809

^[1]

3,327,017

^[1]

Fair Value Measurements At Reporting Date Using Total | Time Deposits

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Available-for-sale securities

58,420

^[1]

1,361,165

^[1]

Fair Value Measurements At Reporting Date Using Total | Corporate Equity Securities | Other corporate equity securities

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Available-for-sale securities

448

^[2]

660

^[2]

Fair Value Measurements At Reporting Date Using Total | Corporate Equity Securities | Alibaba Group

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Available-for-sale securities

22,618,853

39,867,789

Fair Value Measurements At Reporting Date Using Total | Corporate Equity Securities | Hortonworks, Inc

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Available-for-sale securities

84,185

^[2]

104,029

^[2]

Fair Value Measurements At Reporting Date Using Total | Foreign Currency Derivative Contracts

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Foreign currency derivative contracts, assets

111,080

^[3]

202,928

^[3]

Foreign currency derivative contracts, liabilities

$ (10,287)

^[3]

$ (6,157)

^[3]

[1]	The money market funds, government and agency securities, commercial paper and bank certificates of deposit, corporate debt securities, and time deposits are classified as part of either cash and cash equivalents or short or long-term marketable securities on the condensed consolidated balance sheets.
[2]	The Hortonworks equity securities and other corporate equity securities are classified as part of other long-term assets and investments on the condensed consolidated balance sheets.
[3]	Foreign currency derivative contracts are classified as part of either other current or noncurrent assets or liabilities on the condensed consolidated balance sheets. The notional amounts of the foreign currency derivative contracts were: $2.1 billion, including contracts designated as net investment hedges of $1.6 billion, as of December 31, 2014; and $1.9 billion, including contracts designated as net investment hedges of $1.5 billion, as of September 30, 2015.

Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized gains on available-for-sale securities, net of tax	$ 11,859,192	$ 22,084,960
Unrealized gains (losses) on cash flow hedges, net of tax	(1,858)	1,856
Foreign currency translation, net of tax	(422,881)	(67,188)
Accumulated other comprehensive income	$ 11,434,453	$ 22,019,628

- Definition

Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

+ References+ Details

- Definition

Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

+ References+ Details

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References+ Details

Noncontrolling Interests (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Noncontrolling Interest [Line Items]
Beginning noncontrolling interests			$ 43,755	$ 55,688	$ 55,688
Distributions to noncontrolling interests			(15,847)		(22,344)
Net income attributable to noncontrolling interests	1,875	2,291	5,215	7,474	10,411
Ending noncontrolling interests	$ 33,123		$ 33,123		$ 43,755

Other Income (Expense), Net (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Components of Other Income (Expense) [Line Items]
Interest, dividend and investment income	$ 8,010	$ 5,148	$ 24,888	$ 16,180
Interest expense	(18,411)	(17,292)	(53,540)	(51,461)
Gain on sale of Alibaba Group ADSs		10,319,437		10,319,437
Loss on Hortonworks warrants	(12,782)		(19,241)
Foreign exchange losses	(1,490)	(2,109)	(21,017)	(9,048)
Other	718	3,747	2,151	6,781
Total other income (expense), net	$ (23,955)	$ 10,308,931	$ (66,759)	$ 10,281,889

- Definition

This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments (OTTI) of the subject investments.

+ References+ Details

Consolidated Financial Statement Details - Additional Information (Detail) (USD $) In Thousands, except Share data in Millions, unless otherwise specified	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	0 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2015 Other income (expense), net	Sep. 30, 2015 Other income (expense), net	Sep. 24, 2014 Alibaba Group
Financial Statement Details [Line Items]
Number of ADSs sold at initial public offering					140
Loss on Hortonworks warrants	$ (12,782)	$ (19,241)	$ (12,782)	$ (19,241)

- Definition

+ References+ Details

Reclassifications Out of Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenue	$ 1,225,673	$ 1,148,140	$ 3,694,908	$ 3,365,061
Other income (expense), net	(23,955)	10,308,931	(66,759)	10,281,889
Net income attributable to Yahoo! Inc.	76,261	6,774,102	75,905	7,355,387
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income attributable to Yahoo! Inc.	941	(53,199)	3,081	(54,060)
Reclassification out of Accumulated Other Comprehensive Income \| Realized (gains) losses on cash flow hedges, net of tax
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenue	869	(854)	3,007	(1,594)
Reclassification out of Accumulated Other Comprehensive Income \| Realized (gains) losses on available-for-sale securities, net of tax
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense), net	72	(2,044)	74	(2,165)
Reclassification out of Accumulated Other Comprehensive Income \| Foreign currency translation adjustments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense), net		$ (50,301)		$ (50,301)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References+ Details

Reclassifications Out of Accumulated Other Comprehensive Income (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
(Provision) benefit for income taxes	$ 93,208	$ (3,973,402)	$ 75,613	$ (3,985,762)
Foreign currency translation adjustments \| Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
(Provision) benefit for income taxes		$ 30,000		$ 30,000

Acquisitions and Dispositions - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended			3 Months Ended		9 Months Ended		0 Months Ended		0 Months Ended					0 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Sep. 30, 2014 Sold Patents	Jun. 30, 2014 Sold Patents	Sep. 30, 2015 Sold Patents	Sep. 30, 2014 Sold Patents	Dec. 31, 2014 Sold Patents	Dec. 31, 2014 Existing Patents	Dec. 31, 2014 Capture Period Patents	Sep. 30, 2015 Existing Patents and Capture Period Patents	Sep. 30, 2014 Existing Patents and Capture Period Patents	Sep. 30, 2015 Existing Patents and Capture Period Patents	Sep. 30, 2014 Existing Patents and Capture Period Patents	Aug. 25, 2014 Flurry, Inc.	Aug. 25, 2014 Flurry, Inc.	Aug. 25, 2014 Flurry, Inc. Maximum	Aug. 25, 2014 Flurry, Inc. Stock Options	Aug. 25, 2014 Flurry, Inc. Restricted Stock Units (RSUs)	Sep. 02, 2015 Polyvore, Inc.	Sep. 02, 2015 Polyvore, Inc.	Sep. 02, 2015 Polyvore, Inc. Maximum	Sep. 02, 2015 Polyvore, Inc. Stock Options	Sep. 30, 2015 Series of Individually Immaterial Business Acquisitions Entity	Sep. 30, 2014 Series of Individually Immaterial Business Acquisitions Entity
Business Acquisition [Line Items]
Business combination, total purchase price																		$ 269,670,000					$ 160,582,000
Stock-based compensation expense	110,426,000	105,796,000	351,252,000	317,422,000																4,000,000	23,000,000	15,000,000			7,000,000
Period for recognizing stock-based compensation contingently issuable in acquisition																				4 years	4 years	4 years			4 years
Useful life of amortizable intangible assets																			5 years					5 years
Weighted average useful life of amortizable intangible assets																	5 years					3 years
Goodwill	5,266,594,000		5,266,594,000		5,152,570,000													194,081,000					131,180,000			20,000,000	34,000,000
Business combination, number of entities acquired																										1	8
Business combination, total purchase price																										23,000,000	60,000,000
Business combination, cash acquired																											4,000,000
Business combination, cash consideration paid net of cash acquired			174,630,000	313,837,000																							56,000,000
Business combination, amortizable intangible assets																										5,000,000	17,000,000
Business combination, cash acquired																		12,139,000					5,923,000				4,000,000
Business combination, other tangible assets																		51,235,000					12,057,000				10,000,000
Business combination, net assumed liabilities																		43,205,000					7,503,000			2,000,000	5,000,000
Stock based compensation contingently issuable																							15,000,000
Total cash consideration					460,000,000					61,000,000	135,000,000	264,000,000
Gain on sale of patents		1,300,000	11,100,000	62,800,000		1,000,000	60,000,000	11,000,000	63,000,000
Future revenue recognition period											4 years	5 years
Revenue related to patents													$ 22,000,000	$ 22,000,000	$ 65,000,000	$ 22,000,000

Allocation of Purchase Price of Assets Acquired and Liabilities Assumed, Flurry (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014	Aug. 25, 2014 Flurry, Inc.	Aug. 25, 2014 Flurry, Inc. Developed Technology Rights	Aug. 25, 2014 Flurry, Inc. Customer Contracts and Related Relationships	Aug. 25, 2014 Flurry, Inc. Other
Business Acquisition [Line Items]
Cash acquired			$ 12,139
Other tangible assets acquired			51,235
Amortizable intangible assets				7,100	47,600	720
Goodwill	5,266,594	5,152,570	194,081
Total assets acquired			312,875
Liabilities assumed			(43,205)
Total			$ 269,670

Allocation of Purchase Price of Assets Acquired and Liabilities Assumed, Polyvore (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014	Sep. 02, 2015 Polyvore, Inc.	Sep. 02, 2015 Polyvore, Inc. Developed Technology Rights	Sep. 02, 2015 Polyvore, Inc. Tradename	Sep. 02, 2015 Polyvore, Inc. Customer Contracts and Related Relationships
Business Acquisition [Line Items]
Cash acquired			$ 5,923
Other tangible assets acquired			12,057
Amortizable intangible assets				17,550	1,150	225
Goodwill	5,266,594	5,152,570	131,180
Total assets acquired			168,085
Liabilities assumed			(7,503)
Total			$ 160,582

Goodwill (Detail) (USD $)
In Thousands, unless otherwise specified

9 Months Ended

Sep. 30, 2015

Goodwill [Line Items]

Beginning balance

$ 5,152,570

Acquisitions and related adjustments

150,615

Foreign currency translation adjustments

(36,591)

Ending balance

5,266,594

Americas Segment

Goodwill [Line Items]

Beginning balance

4,322,219

^[1]

Acquisitions and related adjustments

130,303

^[1]

Foreign currency translation adjustments

(2,803)

^[1]

Ending balance

4,449,719

^[1]

Europe Middle East Africa Segment

Goodwill [Line Items]

Beginning balance

532,469

^[2]

Acquisitions and related adjustments

20,312

^[2]

Foreign currency translation adjustments

(25,873)

^[2]

Ending balance

526,908

^[2]

Asia Pacific Segment

Goodwill [Line Items]

Beginning balance

297,882

^[3]

Foreign currency translation adjustments

(7,915)

^[3]

Ending balance

$ 289,967

^[3]

[1]	Gross goodwill balance for the Americas segment was $4.4 billion as of September 30, 2015.
[2]	Gross goodwill balance for the EMEA segment was $1.2 billion as of September 30, 2015. The EMEA segment includes accumulated impairment losses of $630 million as of September 30, 2015.
[3]	Gross goodwill balance for the Asia Pacific segment was $449 million as of September 30, 2015. The Asia Pacific segment includes accumulated impairment losses of $159 million as of September 30, 2015.

Goodwill (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2015
Americas Segment
Goodwill [Line Items]
Gross Goodwill Balance	$ 4,400
Europe Middle East Africa Segment
Goodwill [Line Items]
Gross Goodwill Balance	1,200
Accumulated goodwill impairment	630
Asia Pacific Segment
Goodwill [Line Items]
Gross Goodwill Balance	449
Accumulated goodwill impairment	$ 159

Intangible Assets Net (Detail) (USD $)
In Thousands, unless otherwise specified

Sep. 30, 2015

Dec. 31, 2014

Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]

Gross Carrying Amount

$ 688,788

Accumulated Amortization

(291,607)

^[1]

Net

397,181

470,842

Customer, Affiliate And Advertiser Related Relationships

Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]

Gross Carrying Amount

370,314

Accumulated Amortization

(133,107)

^[1]

Net

237,207

281,596

Developed Technology And Patents

Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]

Gross Carrying Amount

209,385

Accumulated Amortization

(107,981)

^[1]

Net

101,404

122,674

Tradenames, Trademarks, And Domain Names

Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]

Gross Carrying Amount

109,089

Accumulated Amortization

(50,519)

^[1]

Net

$ 58,570

$ 66,572

[1]	Cumulative foreign currency translation adjustments, reflecting movement in the currencies of the underlying entities, totaled approximately $17 million as of September 30, 2015.

Intangible Assets Net - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 34,000,000	$ 32,000,000	$ 102,090,000	$ 96,961,000
Estimated amortization expense for the remainder of 2015	33,000,000		33,000,000
Estimated amortization expense 2016	114,000,000		114,000,000
Estimated amortization expense 2017	105,000,000		105,000,000
Estimated amortization expense 2018	85,000,000		85,000,000
Estimated amortization expense 2019	44,000,000		44,000,000
Estimated amortization expense cumulatively thereafter	1,000,000		1,000,000
Cost of revenue - other
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 14,000,000	$ 17,000,000	$ 42,000,000	$ 48,000,000

Basic and Diluted Net Income Attributable to Yahoo Inc. Common Stockholders Per Share - Additional Information (Detail) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share	14	1	6	3

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References+ Details

Computation of Basic and Diluted Net Income per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Net income attributable to Yahoo! Inc.	$ 76,261	$ 6,774,102	$ 75,905	$ 7,355,387
Less: Net income allocated to participating securities		(61)		(66)
Net income attributable to Yahoo! Inc. common stockholders - basic	76,261	6,774,041	75,905	7,355,321
Weighted average common shares	940,822	993,543	937,713	1,001,066
Net income attributable to Yahoo! Inc. common stockholders per share - basic	$ 0.08	$ 6.82	$ 0.08	$ 7.35
Net income attributable to Yahoo! Inc.	76,261	6,774,102	75,905	7,355,387
Less: Net income allocated to participating securities		(60)		(65)
Less: Effect of dilutive securities issued by equity investees	(1,112)	(20,705)	(3,431)	(42,491)
Net income attributable to Yahoo! Inc. common stockholders - diluted	$ 75,149	$ 6,753,337	$ 72,474	$ 7,312,831
Denominator for basic calculation	940,822	993,543	937,713	1,001,066
Denominator for diluted calculation	946,934	1,007,693	944,160	1,017,935
Net income attributable to Yahoo! Inc. common stockholders per share - diluted	$ 0.08	$ 6.70	$ 0.08	$ 7.18
Restricted Stock Units (RSUs)
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Incremental common shares	4,551	10,638	5,155	12,388
Stock Options and Employee Stock Purchase Plan
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Incremental common shares	1,561	3,512	1,292	4,481

Investments in Equity Interests (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Investment in equity interests	$ 2,333,063	$ 2,489,578
Yahoo Japan
Schedule of Equity Method Investments [Line Items]
Investment in equity interests	2,326,486	2,482,660
Percent ownership of common stock as of balance sheet date	35.50%	35.50%
Other
Schedule of Equity Method Investments [Line Items]
Investment in equity interests	$ 6,577	$ 6,918
Percent ownership of common stock as of balance sheet date	20.00%	20.00%

Investments in Equity Interests Using the Equity Method of Accounting - Additional Information (Detail) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		0 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015 Alibaba Group	Sep. 30, 2014 Alibaba Group	Sep. 30, 2015 Alibaba Group	Sep. 30, 2014 Alibaba Group	Jul. 17, 2015 Alibaba Group SpinCo	Jul. 17, 2015 Alibaba Group SpinCo	Sep. 30, 2015 Yahoo Japan	Sep. 30, 2014 Yahoo Japan	Sep. 30, 2015 Yahoo Japan	Sep. 30, 2014 Yahoo Japan	Dec. 31, 2014 Yahoo Japan
Schedule of Equity Method Investments [Line Items]
Fair value of the company's ownership interest in the common stock of Yahoo Japan											$ 7,700,000,000		$ 7,700,000,000
Dividends received from equity investee			142,045,000	83,685,000
Cash proceeds from sale of data center assets														11,000,000
Net gain on sale of data center assets														5,000,000
Revenue received through commercial arrangements with Yahoo Japan											57,000,000	66,000,000	172,000,000	197,000,000
Receivables balance from Yahoo Japan											38,000,000		38,000,000		47,000,000
Unfavorable foreign exchange fluctuations	1,490,000	2,109,000	21,017,000	9,048,000							6,000,000		17,000,000
Royalty received					$ 60,000,000	$ 74,000,000	$ 199,000,000	$ 205,000,000
Alibaba Group shares to be held by SpinCo upon completion of Spin-off									384
Ownership interest percentage										100.00%

Yahoo Japan Condensed Financial Information Operating Data (Detail) (Yahoo Japan, USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Yahoo Japan
Schedule of Equity Method Investments [Line Items]
Revenue	$ 911,735	$ 963,796	$ 2,840,393	$ 3,050,516
Gross profit	712,561	761,802	2,254,511	2,466,986
Income from operations	402,865	485,164	1,266,084	1,452,551
Net income	274,567	321,534	836,081	942,675
Net income attributable to Yahoo Japan	$ 273,636	$ 318,571	$ 832,611	$ 934,098

- Definition

The amount of gross profit (loss) reported by an equity method investment of the entity.

+ References+ Details

- Definition

The amount of income (loss) from continuing operations before extraordinary items reported by an equity method investment of the entity.

+ References+ Details

- Definition

The amount of net income (loss) reported by an equity method investment of the entity.

+ References+ Details

Yahoo Japan Condensed Financial Information Balance Sheet Data (Detail) (Yahoo Japan, USD $) In Thousands, unless otherwise specified	Jun. 30, 2015	Sep. 30, 2014
Yahoo Japan
Schedule of Equity Method Investments [Line Items]
Current assets	$ 5,729,119	$ 6,161,126
Long-term assets	2,198,578	1,908,379
Current liabilities	1,800,500	1,948,540
Long-term liabilities	239,240	35,418
Noncontrolling interests	$ 163,216	$ 66,998

- Definition

The amount of current assets reported by an equity method investment of the entity.

+ References+ Details

- Definition

The amount of current liabilities reported by an equity method investment of the entity.

+ References+ Details

- Definition

Amount of equity attributable to noncontrolling interests of an equity method investment of the entity.

+ References+ Details

- Definition

The amount of noncurrent assets reported by an equity method investment of the entity.

+ References+ Details

- Definition

The amount of noncurrent liabilities reported by an equity method investment of the entity.

+ References+ Details

Foreign Currency Forward Contracts Activity (Detail) (USD $)

3 Months Ended

9 Months Ended

Sep. 30, 2015

Sep. 30, 2014

Sep. 30, 2015

Sep. 30, 2014

Derivative [Line Items]

Gain (Loss) Recorded in Other Income, (Expense), Net

$ (1,490,000)

$ (2,109,000)

$ (21,017,000)

$ (9,048,000)

Net Investment Hedges | Designated as Hedging Instrument

Derivative [Line Items]

Beginning Fair Value

185,000,000

209,000,000

Settlement Payment (Receipt)

(92,000,000)

(178,000,000)

Gain (Loss) Recorded in Other Income, (Expense), Net

1,000,000

Gain (Loss) Recorded in Other Comprehensive Income (Loss)

7,000,000

^[1]

78,000,000

^[2]

Ending Fair Value

101,000,000

109,000,000

101,000,000

109,000,000

Cash Flow Hedges | Designated as Hedging Instrument

Derivative [Line Items]

Beginning Fair Value

8,000,000

4,000,000

Settlement Payment (Receipt)

(1,000,000)

(2,000,000)

Gain (Loss) Recorded in Other Income, (Expense), Net

(1,000,000)

Gain (Loss) Recorded in Other Comprehensive Income (Loss)

(3,000,000)

(1,000,000)

Gain (Loss) Recorded in Revenue

(2,000,000)

4,000,000

Ending Fair Value

1,000,000

4,000,000

1,000,000

4,000,000

Balance Sheet Hedges | Not Designated as Hedging Instrument

Derivative [Line Items]

Beginning Fair Value

4,000,000

Settlement Payment (Receipt)

(22,000,000)

(1,000,000)

Gain (Loss) Recorded in Other Income, (Expense), Net

17,000,000

11,000,000

Gain (Loss) Recorded in Other Comprehensive Income (Loss)

Ending Fair Value

$ (1,000,000)

$ 10,000,000

$ (1,000,000)

$ 10,000,000

[1]	This amount does not reflect the tax impact of $3 million recorded during the nine months ended September 30, 2015. The $4 million after tax impact of the gain recorded within other comprehensive income was included in accumulated other comprehensive income on the Company's condensed consolidated balance sheets.
[2]	This amount does not reflect the tax impact of $29 million recorded during the nine months ended September 30, 2014. The $49 million after tax impact of the loss recorded within other comprehensive income was included in accumulated other comprehensive income on the Company's condensed consolidated balance sheets as of September 30, 2014.

Foreign Currency Forward Contracts Activity (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Derivative [Line Items]
Net investment hedge CTA gains (losses), taxes	$ 8,252	$ (44,951)	$ (2,492)	$ (29,389)
Net investment hedge CTA gains (losses), net of taxes	$ (13,855)	$ 74,490	$ 4,183	$ 48,579

Foreign Currency Forward Contracts Balance Sheet Location and Ending Fair Value (Detail) (Foreign Currency Derivative Contracts, USD $)
In Millions, unless otherwise specified

Sep. 30, 2015

Dec. 31, 2014

Designated as Hedging Instrument | Net Investment Hedges | Assets

Derivatives, Fair Value [Line Items]

Foreign currency forward contract, fair value asset

$ 107

^[1]

$ 190

^[1]

Designated as Hedging Instrument | Net Investment Hedges | Liabilities

Derivatives, Fair Value [Line Items]

Foreign currency forward contract, fair value liability

(6)

^[2]

(5)

^[2]

Designated as Hedging Instrument | Cash Flow Hedges | Assets

Derivatives, Fair Value [Line Items]

Foreign currency forward contract, fair value asset

^[1]

Designated as Hedging Instrument | Cash Flow Hedges | Liabilities

Derivatives, Fair Value [Line Items]

Foreign currency forward contract, fair value liability

(1)

^[2]

Not Designated as Hedging Instrument | Balance Sheet Hedges | Assets

Derivatives, Fair Value [Line Items]

Foreign currency forward contract, fair value asset

^[1]

Not Designated as Hedging Instrument | Balance Sheet Hedges | Liabilities

Derivatives, Fair Value [Line Items]

Foreign currency forward contract, fair value liability

$ (3)

^[2]

$ (1)

^[2]

[1]	Included in prepaid expenses and other current assets or other long-term assets and investments on the condensed consolidated balance sheets.
[2]	Included in accrued expenses and other current liabilities or other long-term liabilities on the condensed consolidated balance sheets.

- Definition

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

+ References+ Details

- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References+ Details

Credit Agreement - Additional Information (Detail) (Amended Credit Agreement on July 24, 2015, USD $)	9 Months Ended
	Sep. 30, 2015
Amended Credit Agreement on July 24, 2015
Line of Credit Facility [Line Items]
Unsecured revolving credit facility expiration date	Jul. 22, 2016
Unsecured revolving credit facility	$ 750,000,000
Unsecured revolving credit facility, additional commitment	250,000,000
Unsecured revolving credit facility, outstanding	$ 0

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References+ Details

Convertible Notes - Additional Information (Detail) (Convertible Senior Notes, USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2013
Convertible Senior Notes
Debt Instrument [Line Items]
Convertible senior notes percent	0.00%		0.00%
Principal	$ 1,437,500	$ 1,437,500
Conversion rate per $1,000 principal amount of Notes	18.7161
Purchase price of notes as percentage of principal amount, plus accrued and unpaid interest	100.00%
Initial conversion price	$ 53.43
Maturity date, convertible senior note	Dec. 01, 2018

- Definition

Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

+ References+ Details

Schedule of Notes (Detail) (Convertible Senior Notes, USD $)
In Thousands, unless otherwise specified

Sep. 30, 2015

Dec. 31, 2014

Convertible Senior Notes

Debt Instrument [Line Items]

Principal

$ 1,437,500

Less: note discount

(220,092)

(267,077)

Net carrying amount

1,217,408

1,170,423

Equity component

$ 305,569

^[1]

$ 305,569

^[1]

[1]	Recorded on the condensed consolidated balance sheets within additional paid-in capital.

Interest Expense Recognized Related To Notes (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Schedule Of Interest Expenses [Line Items]
Accretion of convertible note discount	$ 15,867	$ 15,056	$ 46,984	$ 44,583

Fair Value and Carrying Value of Notes (Detail) (Convertible Senior Notes, USD $) In Thousands, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Carrying Value	$ 1,217,408	$ 1,170,423
Fair Value Measurements At Reporting Date Using Level 2
Debt Instrument [Line Items]
Fair Value	$ 1,248,922	$ 1,175,240

Commitments and Contingencies - Additional Information (Detail) (USD $)	9 Months Ended										0 Months Ended		0 Months Ended
	Sep. 30, 2015	Sep. 30, 2015 Maximum	Sep. 30, 2015 Minimum	Nov. 28, 2012 Non-Final Judgment	Sep. 30, 2015 Affiliate Commitments	Sep. 30, 2015 Finance Lease Obligations	Sep. 30, 2015 Finance Lease Obligations Maximum	Sep. 30, 2015 Construction Liabilities	Sep. 30, 2015 Construction Liabilities Maximum	Sep. 30, 2015 Stockholder Class Action LegalMatter	Nov. 16, 2011 Worldwide directories, SA de CV and Ideas Interactivas, SA de CV Pending Litigation	Dec. 07, 2011 Worldwide directories, SA de CV and Ideas Interactivas, SA de CV Pending Litigation	May 15, 2013 Worldwide directories, SA de CV and Ideas Interactivas, SA de CV Settled Litigation	May 15, 2013 Worldwide directories, SA de CV and Ideas Interactivas, SA de CV Settled Litigation
Commitments and Contingencies Disclosure [Line Items]
Operating and capital lease agreements, original lease period		15 years
Operating and capital lease agreements, expiry year		2025	2015
Total commitments					$ 1,682,000,000	$ 18,000,000		$ 40,000,000
Payable in the remainder of 2015					100,000,000				1,000,000
Payable in 2016					401,000,000		1,000,000	2,000,000
Payable in 2017					400,000,000	1,000,000		3,000,000
Payable in 2018					375,000,000	2,000,000		4,000,000
Payable in 2019					375,000,000	2,000,000		4,000,000
Payable in 2020						2,000,000		4,000,000
Payable thereafter					31,000,000	10,000,000		22,000,000
Non-cancelable commitments	191,000,000
Payable in remainder of 2015	52,000,000
Payable in 2016	101,000,000
Payable in 2017	23,000,000
Payable in 2018	13,000,000
Payable in 2019	2,000,000
Intellectual property arrangements through 2023	18,000,000
Intellectual property arrangements, expiration year	2023
Number of purported stockholder class action suits filed										2
Alleged total damages											2,750,000,000
Counterclaim filed for payments of services rendered				2,600,000								2,600,000		2,600,000
Loss Contingency													$ 172,500

Lease Commitments (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2015
Commitments and Contingencies Disclosure [Line Items]
Gross operating lease commitments, Three months ending December 31, 2015	$ 29
Gross operating lease commitments, years ending December 31, 2016	107
Gross operating lease commitments, 2017	80
Gross operating lease commitments, 2018	56
Gross operating lease commitments, 2019	45
Gross operating lease commitments, 2020	31
Gross operating lease commitments, due after 5 years	84
Total gross operating lease commitments	432
Sublease income, Three months ending December 31, 2015	(4)
Sublease income, years ending December 31, 2016	(12)
Sublease income, 2017	(9)
Sublease income, 2018	(7)
Sublease income, 2019	(5)
Sublease income, 2020	(2)
Sublease income, due after 5 years	(4)
Total sublease income	(43)
Net operating lease commitments, Three months ending December 31, 2015	25
Net operating lease commitments, years ending December 31, 2016	95
Net operating lease commitments, 2017	71
Net operating lease commitments, 2018	49
Net operating lease commitments, 2019	40
Net operating lease commitments, 2020	29
Net operating lease commitments, due after 5 years	80
Total net operating lease commitments	$ 389

Capital Lease Commitment (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2015
Schedule of Capital Lease Obligations [Line Items]
Three months ending December 31, 2015	$ 6
Years ending December 31, 2016	15
2017	10
2018	9
2019	5
2020	0
Due after 5 years	0
Gross capital lease commitments	45
Less: interest	8
Net capital lease commitments included in other accrued expenses and current liabilities and other long-term liabilities	$ 37

Stock Option Activity (Detail) (Stock Options, USD $)
In Thousands, except Per Share data, unless otherwise specified

9 Months Ended

Sep. 30, 2015

Stock Options

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Options outstanding, beginning balance, Shares

9,225

^[1]

Options granted, Shares

Options assumed in acquisitions, Shares

407

Options exercised, Shares

(1,709)

^[2]

Options expired, Shares

(579)

Options cancelled/forfeited, Shares

(313)

Options outstanding, ending balance, Shares

7,031

^[1]

Options outstanding, beginning balance, Weighted average exercise price per share

$ 18.57

^[1]

Options granted, Weighted average exercise price per share

$ 0

Options assumed in acquisitions, Weighted average exercise price per share

$ 11.89

Options exercised, Weighted average exercise price per share

$ 16.59

^[2]

Options expired, Weighted average exercise price per share

$ 19.11

Options cancelled/forfeited, Weighted average exercise price per share

$ 19.89

Options outstanding, ending balance, Weighted average exercise price per share

$ 18.56

^[1]

[1]	Includes shares subject to performance-based stock options for which performance goals had not been set as of the date shown.
[2]	The Company generally issues new shares to satisfy stock option exercises.

Stockholders' Equity and Employee Benefits - Additional Information (Detail) (USD $)	9 Months Ended				9 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015 November 2013 Plan	Nov. 30, 2013 November 2013 Plan	Sep. 30, 2015 March 2015 Plan	Mar. 31, 2015 March 2015 Plan	Sep. 30, 2015 GAAP Revenue	Sep. 30, 2015 Revenue ex -TAC	Sep. 30, 2015 Adjusted EBITDA	Sep. 30, 2015 Stock Options	Sep. 30, 2015 Restricted Stock Units (RSUs)	Sep. 30, 2014 Restricted Stock Units (RSUs)	Sep. 30, 2015 Performance Based Stock Options	Sep. 30, 2015 Performance Based Stock Options First Tranche	Sep. 30, 2015 Performance Based Restricted Stock Units	Sep. 30, 2015 Performance Based Restricted Stock Units First Tranche	Sep. 30, 2015 Performance Based Restricted Stock Units Second Tranche	Sep. 30, 2015 Performance Based Restricted Stock Units Tranche Three	Sep. 30, 2015 Restricted Stock Units	Sep. 30, 2015 Minimum Performance Based Stock Options	Sep. 30, 2015 Minimum Performance Based Restricted Stock Units	Sep. 30, 2015 Maximum Performance Based Stock Options	Sep. 30, 2015 Maximum Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized stock-based compensation expense										$ 31,000,000
Stock-based compensation, recognition period										1 year 9 months 18 days				12 months	12 months				2 years 4 months 24 days
Unamortized stock-based compensation expense, other than options																			764,000,000
Vested											13,844,000	16,000,000
Shares withheld to settle employees' minimum statutory obligation for applicable income and other employment taxes											5,300,000	6,000,000
Payments made to taxing authorities for employees' tax obligations	216,061,000	226,425,000
Stock awards vesting percentage for each performance period																				0.00%	0.00%	100.00%	200.00%
Financial performance metrics for stock option awards, GAAP Revenue													33.3333%
Financial performance metrics for stock option awards, Revenue ex -TAC													33.3333%
Financial performance metrics for stock option awards, Adjusted EBITDA													33.3333%
Stock options grant date fair value														31,000,000
Financial performance metrics for restricted stock units awards							33.3333%	33.3333%	33.3333%
Restricted stock units grant date fair value																9,000,000	11,000,000	19,000,000
Treasury stock acquired repurchase authorization value				5,000,000,000		2,000,000,000
Stock repurchase program expiration date			2016-12		2018-03
Remaining authorized purchase capacity			726,000,000		2,000,000,000
Repurchases of common stock, shares			4,000,000
Average purchase price per share of common stock repurchased during the period			$ 47.65
Repurchases of common stock, value			$ 204,000,000

Weighted Average Assumptions Used to Calculate Fair Value of Options Granted Including Assumed Options from Acquisitions (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	0.00%	0.00%	0.00%	0.00%
Risk-free interest rate	0.90%	1.10%	0.90%	1.30%
Expected volatility	34.50%	32.70%	34.50%	35.80%
Expected life (in years)	2 years 6 months	3 years 3 months 18 days	2 years 6 months	3 years 9 months 7 days

Restricted Stock Units Activity (Detail) (Restricted Stock Units (RSUs), USD $)
In Thousands, except Per Share data, unless otherwise specified

9 Months Ended

Sep. 30, 2015

Sep. 30, 2014

Restricted Stock Units (RSUs)

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Awarded and unvested, Beginning balance

40,677

^[1]

Granted

14,799

^[2]

Assumed in acquisitions

Vested

(13,844)

(16,000)

Forfeited

(9,918)

Awarded and unvested, Ending balance

31,714

^[1]

Weighted-average grant date fair value per share, Beginning balance

$ 32.38

^[1]

Weighted-average grant date fair value per share, granted shares

$ 42.37

^[2]

Weighted-average grant date fair value per share, assumed in acquisitions

$ 0

Weighted-average grant date fair value per share, vested shares

$ 28.30

Weighted-average grant date fair value per share, forfeited shares

$ 32.93

Weighted-average grant date fair value per share, Ending balance

$ 38.66

^[1]

[1]

Includes the maximum number of shares issuable under the Company's performance-based restricted stock unit awards (including future-year tranches for which performance goals had not been set) as of the date shown.

[2]

Restructuring Charges (Reversals), Net (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Restructuring Cost and Reserve [Line Items]
Employee severance pay and related costs	$ 16,597	$ 4,086	$ 67,746	$ 7,759
Non-cancelable lease, contract termination, and other charges	11,103	4,545	33,123	72,983
Reversals of previous charges	(2,590)	(161)	(6,611)	(3,133)
Non-cash accelerations of stock-based compensation expense			2,705
Other non-cash charges (credits)	902		(31)	(7,031)
Restructuring charges, net	$ 26,012	$ 8,470	$ 96,932	$ 70,578

- Definition

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

+ References+ Details

Restructuring Charges (Reversals), Net - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	$ 26,012	$ 8,470	$ 96,932	$ 70,578
Restructuring liability	74,268		74,268		83,608
Americas Segment
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	9,000	4,000	62,000	59,000
Restructuring liability	51,891		51,891		65,949
Europe Middle East Africa Segment
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	17,000	1,000	31,000	8,000
Restructuring liability	22,372		22,372		16,797
Asia Pacific Segment
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net		3,000	4,000	4,000
Restructuring liability	5		5		862
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring liability	19,000		19,000
Non-Cancelable Lease Costs
Restructuring Cost and Reserve [Line Items]
Restructuring liability	$ 55,000		$ 55,000

Restructuring Accrual Activity (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Restructuring Cost and Reserve [Line Items]
Beginning balance			$ 83,608
Restructuring charges	26,012	8,470	96,932	70,578
Cash paid			(102,657)
Non-cash accelerations of stock-based compensation expense			(2,705)
Foreign currency translation and other adjustments			(910)
Ending balance	$ 74,268		$ 74,268

Restructuring Accrual by Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Total restructuring accruals	$ 74,268	$ 83,608
Americas Segment
Restructuring Cost and Reserve [Line Items]
Total restructuring accruals	51,891	65,949
Europe Middle East Africa Segment
Restructuring Cost and Reserve [Line Items]
Total restructuring accruals	22,372	16,797
Asia Pacific Segment
Restructuring Cost and Reserve [Line Items]
Total restructuring accruals	$ 5	$ 862

Income Taxes - Additional Information (Detail) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended			9 Months Ended					0 Months Ended	12 Months Ended
	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015 Foreign Tax Authority Tax authorities from the Brazilian State	Sep. 30, 2015 Foreign Tax Authority Tax authorities from the Brazilian State Earliest Tax Year	Sep. 30, 2015 Foreign Tax Authority Tax authorities from the Brazilian State Latest Tax Year	Sep. 24, 2014 Alibaba Group	Dec. 31, 2012 Alibaba Group
Income Taxes [Line Items]
Income tax expense (benefit)	$ (93,208,000)		$ 3,973,402,000	$ (75,613,000)	$ 3,985,762,000
Number of ADSs sold at initial public offering									140
Undistributed earnings of foreign subsidiaries	3,200,000,000			3,200,000,000
Unrecognized tax benefits	1,100,000,000			1,100,000,000
Unrecognized tax benefits recorded on condensed consolidated balance sheets	1,000,000,000			1,000,000,000
Increase (decrease) in gross unrecognized tax benefit				30,000,000
Reasonably possible reduction in unrecognized tax benefits in the next twelve months	152,000,000			152,000,000
Alibaba deferred tax liabilities	9,100,000,000			9,100,000,000
Tax payment related to YHK's sale of Alibaba Group ADSs		3,300,000,000
Sale of investments in equity interests, shares										523
Indirect tax assessed, not accrued						$ 86,000,000
Tax assessment year							2008	2011

Segment Information (Detail) (USD $)
In Thousands, unless otherwise specified

3 Months Ended

9 Months Ended

Sep. 30, 2015

Sep. 30, 2014

Sep. 30, 2015

Sep. 30, 2014

Segment Reporting Information [Line Items]

Revenue

$ 1,225,673

$ 1,148,140

$ 3,694,908

$ 3,365,061

TAC

223,229

54,180

606,598

143,915

Revenue ex-TAC

1,002,444

1,093,960

3,088,310

3,221,146

Global operating costs

603,215

^[1]

646,042

^[1]

1,916,240

^[1]

1,903,194

^[1]

Gain on sales of patents

(1,300)

(11,100)

(62,800)

Asset impairment charge

41,699

Restructuring charges, net

26,012

8,470

96,932

70,578

Depreciation and amortization

152,412

149,144

457,630

453,538

Stock-based compensation expense

110,426

105,796

351,252

317,422

Income (loss) from operations

(86,312)

42,172

(218,460)

110,788

Americas Segment

Segment Reporting Information [Line Items]

Revenue

987,374

873,306

2,964,305

2,545,769

TAC

201,855

42,607

549,332

106,997

Revenue ex-TAC

785,519

830,699

2,414,973

2,438,772

Direct costs by segment

84,582

^[2]

66,516

^[2]

240,406

^[2]

213,000

^[2]

Restructuring charges, net

9,000

4,000

62,000

59,000

Europe Middle East Africa Segment

Segment Reporting Information [Line Items]

Revenue

79,614

89,058

246,530

278,475

TAC

12,745

7,980

37,399

27,385

Revenue ex-TAC

66,869

81,078

209,131

251,090

Direct costs by segment

23,196

^[2]

23,166

^[2]

63,947

^[2]

66,505

^[2]

Restructuring charges, net

17,000

1,000

31,000

8,000

Asia Pacific Segment

Segment Reporting Information [Line Items]

Revenue

158,685

185,776

484,073

540,817

TAC

8,629

3,593

19,867

9,533

Revenue ex-TAC

150,056

182,183

464,206

531,284

Direct costs by segment

47,214

^[2]

53,954

^[2]

149,764

^[2]

148,921

^[2]

Restructuring charges, net

$ 3,000

$ 4,000

[1]

[2]

Property and Equipment Net by Segment (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total property and equipment, net	$ 1,590,439	$ 1,487,684
Americas Segment
Segment Reporting Information [Line Items]
Total property and equipment, net	1,495,400	1,383,384
Americas Segment \| United States
Segment Reporting Information [Line Items]
Total property and equipment, net	1,494,905	1,382,597
Americas Segment \| Other Americas
Segment Reporting Information [Line Items]
Total property and equipment, net	495	787
Europe Middle East Africa Segment
Segment Reporting Information [Line Items]
Total property and equipment, net	31,710	34,649
Asia Pacific Segment
Segment Reporting Information [Line Items]
Total property and equipment, net	$ 63,329	$ 69,651

Revenues for Groups of Similar Services (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue from External Customer [Line Items]
Total revenue	$ 1,225,673	$ 1,148,140	$ 3,694,908	$ 3,365,061
Search
Revenue from External Customer [Line Items]
Total revenue	509,478	452,355	1,562,270	1,325,540
Display
Revenue from External Customer [Line Items]
Total revenue	508,617	446,980	1,472,726	1,336,257
Other
Revenue from External Customer [Line Items]
Total revenue	207,578	248,805	659,912	703,264
United States
Revenue from External Customer [Line Items]
Total revenue	958,394	839,080	2,887,134	2,444,696
International
Revenue from External Customer [Line Items]
Total revenue	$ 267,279	$ 309,060	$ 807,774	$ 920,365

Search Agreement with Microsoft Corporation - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	0 Months Ended					3 Months Ended		9 Months Ended		12 Months Ended
	May 01, 2015	Apr. 15, 2015	Feb. 23, 2015	Dec. 09, 2010	Feb. 23, 2010	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Search Agreement With Microsoft Corporation [Line Items]
Percentage of search queries originating from personal computers accessing Yahoo Properties and its Affiliate sites that a payment request can be made	51.00%
Revenue share rate from Microsoft's services under the Search Agreement, to be received in first five years								88.00%
Revenue share rate		93.00%	90.00%
Microsoft revenue share rate before deduction of affiliate site's share of revenue		7.00%
Term of search agreement with Microsoft, years					10 years
Percentage of revenue attributable to Search Agreement						33.00%	36.00%	36.00%	36.00%
Revenue collected from Search Agreement								$ 0		$ 52
Uncollected Search Agreement revenue						$ 280		$ 280		$ 330
Term of license of core search technology with Microsoft, years				10 years

Fair Value of Financial Assets and Liabilities (Parenthetical) (Detail) (Foreign Currency Derivative Contracts, USD $) In Millions, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency derivative contract, notional amount	$ 1,900	$ 2,100
Designated as Hedging Instrument \| Net Investment Hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency derivative contract, notional amount	$ 1,502	$ 1,647

Notional Amounts of Outstanding Forward Contracts (Detail) (Foreign Currency Derivative Contracts, USD $) In Millions, unless otherwise specified	Sep. 30, 2015	Dec. 31, 2014
Designated as Hedging Instrument \| Net Investment Hedges
Derivative [Line Items]
Derivative notional amount	$ 1,502	$ 1,647
Designated as Hedging Instrument \| Cash Flow Hedges
Derivative [Line Items]
Derivative notional amount	122	222
Not Designated as Hedging Instrument \| Balance Sheet Hedges
Derivative [Line Items]
Derivative notional amount	$ 257	$ 243

Subsequent Events - Additional Information (Detail) (Subsequent Event, Google)	0 Months Ended
	Oct. 19, 2015
Subsequent Event \| Google
Subsequent Event [Line Items]
Services Agreement, Effective Date	Oct. 01, 2015
Services Agreement, Expiration Date	Dec. 31, 2018