Altaba (AABA) 10-K 1 Mar 17 2016 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2016	Feb. 10, 2017	Jun. 30, 2016
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
Trading Symbol	YHOO
Entity Registrant Name	YAHOO INC
Entity Central Index Key	1,011,006
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		956,487,217
Entity Public Float			$ 32,522,108,074

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents		$ 1,119,469	$ 1,631,911
Short-term marketable securities		5,700,925	4,225,112
Accounts receivable, net of allowance of $57,503 and $32,537 as of December 31, 2015 and 2016, respectively		1,084,267	1,047,504
Prepaid expenses and other current assets (includes restricted cash of $29,678 and $55,168 as of December 31, 2015 and 2016, respectively)		221,499	602,792
Total current assets		8,126,160	7,507,319
Long-term marketable securities		1,089,707	975,961
Property and equipment, net		1,209,937	1,547,323
Goodwill		415,809	808,114
Intangible assets, net		161,644	347,269
Other long-term assets and investments		206,059	342,390
Investment in Alibaba Group		33,680,879	31,172,361
Investments in equity interests		3,192,884	2,503,229
Total assets		48,083,079	45,203,966
Current liabilities:
Accounts payable		171,520	208,691
Other accrued expenses and current liabilities		1,006,676	934,658
Deferred revenue		109,228	134,031
Total current liabilities		1,287,424	1,277,380
Convertible notes		1,299,945	1,233,485
Long-term deferred revenue		39,583	27,801
Other long-term liabilities		95,597	118,689
Deferred tax liabilities related to investment in Alibaba Group	[1]	13,633,988	12,611,867
Deferred and other long-term tax liabilities		642,466	855,324
Total liabilities		16,999,003	16,124,546
Commitments and contingencies (Note 12)
Yahoo! Inc. stockholders' equity:
Preferred stock, $0.001 par value; 10,000 shares authorized; none issued or outstanding		0	0
Common stock, $0.001 par value; 5,000,000 shares authorized; 962,959 shares issued and 945,854 shares outstanding as of December 31, 2015 and 972,472 shares issued and 955,308 shares outstanding as of December 31, 2016		969	959
Additional paid-in capital		9,125,459	8,807,273
Treasury stock at cost, 17,105 shares as of December 31, 2015 and 17,164 shares as of December 31, 2016		(908,996)	(911,533)
Retained earnings		4,353,958	4,570,807
Accumulated other comprehensive income		18,477,893	16,576,031
Total Yahoo! Inc. stockholders' equity		31,049,283	29,043,537
Noncontrolling interests		34,793	35,883
Total equity		31,084,076	29,079,420
Total liabilities and equity		$ 48,083,079	$ 45,203,966
[1]	Deferred and other income tax liabilities are presented on a net basis by jurisdiction. The balances as of December 31, 2015 and 2016 include the deferred tax liabilities related to investment in Alibaba Group.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
Accounts receivable, allowance		$ 32,537	$ 57,503
Restricted cash	[1]	$ 55,168	$ 29,678
Preferred stock, par value		$ 0.001	$ 0.001
Preferred stock, shares authorized		10,000	10,000
Preferred stock, issued		0	0
Preferred stock, outstanding		0	0
Common stock, par value		$ 0.001	$ 0.001
Common stock, shares authorized		5,000,000	5,000,000
Common stock, shares issued		972,472	962,959
Common stock, shares outstanding		955,308	945,854
Treasury stock at cost, shares		17,164	17,105
[1]	The majority of the balance as of December 31, 2015 and 2016 represents customer funds received by the Company in connection with its online e-commerce services in the Asia Pacific region that are restricted in a separate bank account. In addition, the balance as of December 31, 2016 also included customer funds received by the Company in connection with its fantasy sports that are restricted in separate bank accounts.

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenue	$ 5,169,135	$ 4,968,301	$ 4,618,133
Operating expenses:
Cost of revenue-traffic acquisition costs	1,650,786	877,514	217,531
Cost of revenue-other	1,068,108	1,200,234	1,169,844
Sales and marketing	881,521	1,080,718	1,084,438
Product development	1,055,462	1,177,923	1,156,386
General and administrative	650,708	687,804	686,272
Amortization of intangibles	58,302	79,042	66,750
Gain on sale of patents and land	(121,559)	(11,100)	(97,894)
Asset impairment charge	0	44,381	0
Goodwill impairment charge	394,901	4,460,837	88,414
Intangible assets impairment charge	87,335	15,423	0
Restructuring charges, net	88,629	104,019	103,450
Total operating expenses	5,814,193	9,716,795	4,475,191
Income (loss) from operations	(645,058)	(4,748,494)	142,942
Other income (expense), net	(53,916)	(75,782)	10,369,439
Income (loss) before income taxes and earnings in equity interests	(698,974)	(4,824,276)	10,512,381
(Provision) benefit for income taxes	126,228	89,598	(4,038,102)
Earnings in equity interests, net of tax	363,283	383,571	1,057,863
Net income (loss)	(209,463)	(4,351,107)	7,532,142
Net income attributable to noncontrolling interests	(4,858)	(7,975)	(10,411)
Net income (loss) attributable to Yahoo! Inc.	$ (214,321)	$ (4,359,082)	$ 7,521,731
Net income (loss) attributable to Yahoo! Inc. common stockholders per share-basic	$ (0.23)	$ (4.64)	$ 7.61
Net income (loss) attributable to Yahoo! Inc. common stockholders per share-diluted	$ (0.23)	$ (4.64)	$ 7.45
Shares used in per share calculation-basic	949,843	939,141	987,819
Shares used in per share calculation-diluted	949,843	939,141	1,004,108
Stock-based compensation expense by function:
Stock-based compensation expense by function	$ 491,902	$ 457,153	$ 420,174
Cost of revenue - other
Stock-based compensation expense by function:
Stock-based compensation expense by function	34,742	32,010	42,155
Sales and marketing
Stock-based compensation expense by function:
Stock-based compensation expense by function	142,301	141,418	145,777
Product development
Stock-based compensation expense by function:
Stock-based compensation expense by function	213,451	190,454	139,056
General and administrative
Stock-based compensation expense by function:
Stock-based compensation expense by function	101,408	93,271	93,186
Restructuring charges, net
Stock-based compensation expense by function:
Stock-based compensation expense by function	$ 7,374	$ 2,705	$ 0

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net income (loss)	$ (209,463)	$ (4,351,107)	$ 7,532,142
Available-for-sale securities:
Unrealized gains (losses) on available-for-sale securities, net of taxes of $(15,170,607), $3,551,551, and $(1,000,094) for 2014, 2015, and 2016, respectively	1,458,245	(5,166,595)	22,072,073
Reclassification adjustment for realized (gains) losses on available-for-sale securities included in net income (loss), net of taxes of $1,339, $(104), and $(100) for 2014, 2015, and 2016, respectively	181	174	(2,218)
Net change in unrealized gains (losses) on available-for-sale securities, net of tax	1,458,426	(5,166,421)	22,069,855
Foreign currency translation adjustments ("CTA"):
Foreign CTA (losses) gains, net of taxes of $1,734, $1,279, and $(90) for 2014, 2015, and 2016, respectively	498,036	(279,135)	(363,013)
Net investment hedge CTA gains (losses), net of taxes of $(79,037), $(1,941), and $18,766 for 2014, 2015, and 2016, respectively	(34,005)	3,333	130,904
Reclassification adjustment for realized (gains) losses included in CTA, net of taxes of $30,325, $0, and $0 for 2014, 2015, and 2016, respectively	(20,094)	0	(50,301)
Net foreign CTA (losses) gains, net of tax	443,937	(275,802)	(282,410)
Cash flow hedges:
Unrealized gains (losses) on cash flow hedges, net of taxes of $(3,044), $(490), and $2,645 for 2014, 2015, and 2016, respectively	(4,799)	(5,795)	5,704
Reclassification adjustment for realized (gains) losses on cash flow hedges included in net income (loss), net of taxes of $2,771, $1,319, and $(2,369) for 2014, 2015, and 2016, respectively	4,298	4,421	(5,259)
Net change in unrealized gains (losses) on cash flow hedges, net of tax	(501)	(1,374)	445
Other comprehensive income (loss)	1,901,862	(5,443,597)	21,787,890
Comprehensive income (loss)	1,692,399	(9,794,704)	29,320,032
Less: comprehensive income attributable to noncontrolling interests	(4,858)	(7,975)	(10,411)
Comprehensive income (loss) attributable to Yahoo! Inc.	$ 1,687,541	$ (9,802,679)	$ 29,309,621

Consolidated Statements of Com6

Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Unrealized gains (losses) on available-for-sale securities, taxes	$ (1,000,094)	$ 3,551,551	$ (15,170,607)
Reclassification adjustment for realized (gains) losses on available-for-sale securities included in net income (loss), taxes	(100)	(104)	1,339
Foreign CTA (losses) gains, taxes	(90)	1,279	1,734
Net investment hedge CTA gains (losses), taxes	18,766	(1,941)	(79,037)
Reclassification adjustment for realized (gains) losses included in CTA, taxes	0	0	30,325
Unrealized gains (losses) on cash flow hedges, taxes	2,645	(490)	(3,044)
Reclassification adjustment for realized (gains) losses on cash flow hedges included in net income (loss), taxes	$ (2,369)	$ 1,319	$ 2,771

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands	Total	Common stock	Common stockAccelerated Share Repurchase Agreements	Additional Paid-in Capital	Treasury stock	Treasury stockAccelerated Share Repurchase Agreements	Retained earnings	Accumulated other comprehensive income
Balance, beginning of year at Dec. 31, 2013		$ 1,015,000		$ 8,688,304,000	$ (200,228,000)		$ 4,267,429,000	$ 318,389,000
Common stock and stock-based awards issued				306,608,000
Repurchases of common stock					(2,430,436,000)	$ (1,732,794,000)
Net income (loss) attributable to Yahoo! Inc.	$ 7,521,731,000						7,521,731,000
Net change in unrealized gains (losses) on available-for-sale securities, net of tax	22,069,855,000							22,069,855,000
Common stock issued		24,000
Stock-based compensation expense				432,614,000
Treasury shares reissuance					4,189,000		(2,792,000)
Net change in unrealized gains (losses) on cash flow hedges, net of tax	445,000							445,000
Common stock retired		(94,000)
Tax benefits from stock-based awards				145,711,000
Foreign currency translation adjustments, net of tax	(282,410,000)							(369,061,000)
Tax withholdings related to net share settlements of restricted stock awards				(280,879,000)
Retirement of treasury stock		(94,000)		(794,596,000)	3,646,814,000		(2,852,124,000)
Other				1,713,000
Balance, end of year at Dec. 31, 2014	38,741,837,000	$ 945,000		8,499,475,000	(712,455,000)		8,934,244,000	22,019,628,000
Balance, beginning of year (in shares) at Dec. 31, 2013		1,014,338
Common stock and restricted stock issued (in shares)		24,197
Restricted stock issued (forfeited) under compensation arrangements related to acquisitions		0
Repurchases of common stock (in shares)		(61,838)	(39,859)
Balance, end of year (in shares) at Dec. 31, 2014		936,838
Common stock and stock-based awards issued				58,778,000
Repurchases of common stock					(203,771,000)	0
Net income (loss) attributable to Yahoo! Inc.	(4,359,082,000)						(4,359,082,000)
Net change in unrealized gains (losses) on available-for-sale securities, net of tax	(5,166,421,000)							(5,166,421,000)
Common stock issued		$ 14,000
Stock-based compensation expense				464,586,000
Treasury shares reissuance					4,693,000		(4,355,000)
Net change in unrealized gains (losses) on cash flow hedges, net of tax	(1,374,000)							(1,374,000)
Common stock retired		0
Tax benefits from stock-based awards				41,729,000
Foreign currency translation adjustments, net of tax	(275,802,000)							(275,802,000)
Tax withholdings related to net share settlements of restricted stock awards				(257,731,000)
Retirement of treasury stock				0	0		0
Other				436,000
Balance, end of year at Dec. 31, 2015	29,043,537,000	$ 959,000		8,807,273,000	(911,533,000)		4,570,807,000	16,576,031,000
Common stock and restricted stock issued (in shares)		12,824
Restricted stock issued (forfeited) under compensation arrangements related to acquisitions		468
Repurchases of common stock (in shares)		(4,276)	0
Balance, end of year (in shares) at Dec. 31, 2015		945,854
Common stock and stock-based awards issued				17,498,000
Repurchases of common stock					0	$ 0
Net income (loss) attributable to Yahoo! Inc.	(214,321,000)						(214,321,000)
Net change in unrealized gains (losses) on available-for-sale securities, net of tax	1,458,426,000							1,458,426,000
Common stock issued		$ 10,000
Stock-based compensation expense				503,468,000
Treasury shares reissuance					2,537,000		(2,528,000)
Net change in unrealized gains (losses) on cash flow hedges, net of tax	(501,000)							(501,000)
Common stock retired		0
Tax benefits from stock-based awards				6,256,000
Foreign currency translation adjustments, net of tax	443,937,000							443,937,000
Tax withholdings related to net share settlements of restricted stock awards				(209,053,000)
Retirement of treasury stock				0	0		0
Other				17,000
Balance, end of year at Dec. 31, 2016	$ 31,049,283,000	$ 969,000		$ 9,125,459,000	$ (908,996,000)		$ 4,353,958,000	$ 18,477,893,000
Common stock and restricted stock issued (in shares)		9,569
Restricted stock issued (forfeited) under compensation arrangements related to acquisitions		(115)
Repurchases of common stock (in shares)		0	0
Balance, end of year (in shares) at Dec. 31, 2016		955,308

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (209,463)	$ (4,351,107)	$ 7,532,142
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation	407,341	472,894	475,031
Amortization of intangible assets	100,214	136,719	131,537
Accretion of convertible notes discount	66,461	63,061	59,838
Stock-based compensation expense	499,276	459,858	420,174
Non-cash asset impairment charge	0	44,381	0
Non-cash goodwill impairment charge	394,901	4,460,837	88,414
Non-cash intangible assets impairment charge	87,335	15,423	0
Non-cash restructuring (reversals) charges	1,227	3,150	(3,394)
Non-cash accretion on marketable securities	25,280	47,218	30,878
Foreign exchange loss (gain)	(27,428)	4,376	15,978
Gain on sale of assets and other	(3,316)	(2,878)	(11,383)
Gain on sale of Alibaba Group ADSs	0	0	(10,319,437)
Gain on sale of patents and land	(121,559)	(11,100)	(97,894)
(Gain) loss on Hortonworks warrants	50,046	19,199	(98,062)
Earnings in equity interests	(363,283)	(383,571)	(1,057,863)
Tax benefits from stock-based awards	6,256	41,729	145,711
Excess tax benefits from stock-based awards	(18,007)	(58,282)	(149,582)
Deferred income taxes	(224,737)	(42,341)	465,873
Dividends received from equity investees	156,968	142,045	83,685
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	(43,029)	(39,065)	29,278
Prepaid expenses and other	376,351	21,842	(82,419)
Accounts payable	(4,550)	(59,965)	14,165
Accrued expenses and other liabilities	105,677	109,776	156,307
Incomes taxes payable related to sale of Alibaba Group ADSs	0	(3,282,293)	3,282,293
Deferred revenue	(13,098)	(195,328)	(194,920)
Net cash provided by (used in) operating activities	1,248,863	(2,383,422)	916,350
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property and equipment	(239,109)	(554,163)	(413,019)
Proceeds from sales of property and equipment	249,787	11,176	17,404
Purchases of marketable securities	(7,817,485)	(5,206,245)	(7,890,092)
Proceeds from sales of marketable securities	387,254	822,997	2,269,659
Proceeds from maturities of marketable securities	5,816,713	6,691,645	945,696
Proceeds from sale of Alibaba Group ADSs, net of underwriting discounts, commissions, and fees	0	0	9,404,974
Acquisitions, net of cash acquired	0	(175,693)	(859,036)
Proceeds from sales of patents	1,500	29,100	86,300
Purchases of intangible assets	(2,045)	(4,811)	(2,658)
Proceeds from settlement of derivative hedge contracts	39,007	147,179	254,496
Payments for settlement of derivative hedge contracts	(9,717)	(8,817)	(5,454)
Payments for equity investments in privately held companies	(9)	0	(74,399)
Other investing activities, net	(161)	(256)	4,630
Net cash provided by (used in) investing activities	(1,574,265)	1,752,112	3,738,501
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock	17,517	59,130	308,029
Repurchases of common stock	0	(203,771)	(4,163,227)
Excess tax benefits from stock-based awards	18,007	58,282	149,582
Tax withholdings related to net share settlements of restricted stock units	(209,053)	(257,731)	(280,879)
Distributions to noncontrolling interests	(5,948)	(15,847)	(22,344)
Other financing activities, net	(14,205)	(17,321)	(13,627)
Net cash used in financing activities	(193,682)	(377,258)	(4,022,466)
Effect of exchange rate changes on cash and cash equivalents	6,642	(23,619)	(45,877)
Net change in cash and cash equivalents	(512,442)	(1,032,187)	586,508
Cash and cash equivalents at beginning of period	1,631,911	2,664,098	2,077,590
Cash and cash equivalents at end of period	1,119,469	1,631,911	2,664,098
NON-CASH ACTIVITIES:
Change in non-cash acquisitions of property and equipment	$ (4,277)	$ (12,392)	$ (27,533)

The Company and Summary of Sign

The Company and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2016
The Company and Summary of Significant Accounting Policies	Note 1 The Company and Summary of Significant Accounting Policies The Company. Basis of Presentation. 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. Concentration of Risk. The fair value of the equity investments in Alibaba Group and Hortonworks will vary over time and is subject to a variety of risks including: company performance, macro-economic, regulatory, industry, 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 the Company’s investments in marketable equity securities fluctuates, including Alibaba Group and Hortonworks changes. Accounts receivable are typically unsecured and are derived from revenue earned from customers. The Company performs ongoing credit evaluations of its customers and maintains allowances for potential credit losses. The Company’s derivative instruments, including the convertible note hedge transactions, expose the Company to credit risk to the extent that its derivative counterparties become unable to meet their financial obligations under the terms of the agreements. The Company seeks to mitigate this risk by limiting its derivative counterparties to major financial institutions and by spreading the risk across several major financial institutions. In addition, the potential risk of loss with any one counterparty resulting from this type of credit risk is monitored on an ongoing basis. See “Note 9—Foreign Currency Derivative Financial Instruments” for additional information related to the Company’s derivative instruments. The Company also holds warrants in Hortonworks, which expose the Company to variability in fair value based on changes in the stock price and volatility as inputs to the Black-Scholes model. Revenue under the Company’s Search and Advertising Services and Sales Agreement (as amended, “Microsoft Search Agreement”) with Microsoft Corporation (“Microsoft”) represented approximately 35 percent, 35 percent, and 37 percent of the Company’s revenue for the years ended December 31, 2014, 2015, and 2016, respectively, and no other individual customer accounted for 10 percent or more of the Company’s revenue for 2014, 2015, or 2016. As of December 31, 2015 and 2016, no one customer accounted for 10 percent or more of the accounts receivable balance. Comprehensive Income (Loss). available-for-sale, Foreign Currency. case-by-case period-end re-measurement non-functional Cash and Cash Equivalents, Short- and Long-Term Marketable Securities. Operating cash deposits held with banks may exceed the amount of insurance provided on such deposits. Generally, these deposits may be redeemed upon demand and are maintained with financial institutions with reputable credit and therefore bear limited credit risk. The Company seeks to mitigate its credit risk by spreading such risk across multiple counterparties and monitoring the risk profiles of these counterparties. The Company’s marketable equity securities, including Alibaba Group and Hortonworks, are classified as available-for-sale available-for-sale Realized gains or losses and declines in value judged to be other-than-temporary, if any, on available-for-sale available-for-sale available-for-sale Allowance for Doubtful Accounts. Foreign Currency Derivative Financial Instruments. after-tax after-tax For derivatives designated as cash flow hedges, the effective portion of the unrealized gains or losses on these forward contracts is recorded in accumulated other comprehensive income on the Company’s consolidated balance sheets and reclassified into revenue in the consolidated statements of operations when the underlying hedged revenue is recognized. If the cash flow hedges were to become ineffective, the ineffective portion would be immediately recorded in other income (expense), net in the Company’s consolidated statements of operations. 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 balance sheet hedges are used to partially offset the foreign currency exchange gains and losses generated by the re-measurement non-functional The Company recognizes all derivative instruments as other assets or liabilities on the Company’s consolidated balance sheets at fair value. See Note 9—“Foreign Currency Derivative Financial Instruments” for a full description of the Company’s derivative financial instrument activities and related accounting. Property and Equipment. Property and equipment to be held and used are reviewed for impairment whenever events or changes in circumstances indicate that the carrying value of the assets may not be recoverable. Determination of recoverability is based on the lowest level of identifiable estimated undiscounted future cash flows resulting from the use of the asset and its eventual disposition. Measurement of any impairment loss for long-lived assets that management expects to hold and use is based on the excess of the carrying value of the asset over its fair value. No impairments of such assets were identified during any of the periods presented. Capitalized Software and Labor. internal-use Goodwill. Intangible Assets. Originally Developed Content and Acquired Content. For originally developed content, the Company performs regular recoverability assessments on a program-by-program For acquired content, the Company compares the net realizable value on a program-by-program Investments in Equity Interests. The Company reviews its investments for other-than-temporary impairment whenever events or changes in business circumstances indicate that the carrying value of the investment may not be fully recoverable. Investments identified as having an indication of impairment are subject to further analysis to determine if the impairment is other-than-temporary and this analysis requires estimating the fair value of the investment. The determination of fair value of the investment involves considering factors such as the stock prices of public companies in which the Company has an equity investment, current economic and market conditions, the operating performance of the companies including current earnings trends and forecasted cash flows, and other company and industry specific information. Leasing. lease-by-lease The Company establishes assets and liabilities for the estimated construction costs incurred under build-to-suit build-to-suit Income Taxes. Significant judgment is required in evaluating the Company’s uncertain tax positions and determining its provision for income taxes. The Company establishes liabilities for tax-related tax-related Revenue Recognition. non-graphical, Search Revenue. end-user On April 15, 2015, the Company and Microsoft Corporation (“Microsoft”) entered into the Eleventh Amendment (the “Eleventh Amendment”) to the Search and Advertising Services and Sales Agreement (“Microsoft Search Agreement”). Pursuant to the Eleventh Amendment, the Company completed the transition of its exclusive sales responsibilities to Microsoft for Microsoft’s paid search services to premium advertisers in the United States, Canada, and Europe on April 1, 2016 and in its remaining markets (other than Taiwan and Hong Kong) on June 1, 2016. Following the transition in each respective market, Yahoo is considered the principal in the sale of traffic to Microsoft and other customers because Yahoo is the primary obligor in its arrangements with Microsoft and has discretion in how search queries from Affiliate sites will be fulfilled and monetized. As a result, amounts paid to Affiliates under the Microsoft Search Agreement in the transitioned markets are recorded as cost of revenue—TAC rather than as a reduction to revenue, resulting in revenue from the Microsoft Search Agreement being reported on a gross rather than net basis. Effective June 3, 2016, the Company and Microsoft further amended the Microsoft Search Agreement to provide that sales responsibilities for premium advertisers in Taiwan and Hong Kong will not be transitioned. TAC in those markets will continue to be reported as a reduction to revenue. The table below presents how the Company accounted for amounts paid to Affiliates related to the Microsoft Search Agreement in transitioned markets, and shows the impact of the implementation of the Eleventh Amendment in transitioned markets (in thousands): Years Ended December 31, 2014 2015 2016 Cost of revenue—TAC in transitioned markets (*) $ — $ — $ 812,105 Reduction to revenue in transitioned markets $ 1,319,242 $ 1,269,134 $ 273,705 (*) For the year ended December 31, 2016, cost of revenue—TAC included $701 million in the Americas segment, $106 million in the EMEA segment, and $5 million in the Asia Pacific segment. See Note 19—“Microsoft Search Agreement” for a description of the Search Agreement with Microsoft. Prior to the Eleventh Amendment, 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 Microsoft 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 Company is responsible for paying the Affiliate for the Affiliate site’s share of revenue. The Company also recognizes search revenue generated from mobile and desktop ads served through Yahoo Gemini (Yahoo’s unified marketplace for search and native advertising on Yahoo Properties and Affiliate sites). The Company is considered the primary obligor to the advertisers who are the customers of the search advertising service. Accordingly, the search revenue generated from mobile and desktop ads served through Yahoo Gemini that involve traffic supplied by Affiliates is reported gross of the traffic acquisition costs (“TAC”) paid to Affiliates (reported as cost of revenue—TAC) as the Company performs the search service for advertisers. In October 2015, Yahoo reached an agreement with Google that provides Yahoo with additional flexibility to choose among suppliers of search results and ads. Google’s offerings complement the search services provided by Microsoft and Yahoo Gemini. Yahoo is considered the principal in the sale of traffic to Google because Yahoo is the primary obligor in its arrangement with Google and has discretion in how search queries from Affiliate sites will be fulfilled and monetized. As a result, amounts paid to Affiliates under the Google agreement are recorded as cost of revenue—TAC. Additionally, the Company generates search revenue from a revenue sharing arrangement with Yahoo Japan for search technology and services and records the related revenue as reported. Display Revenue. From time-to-time, Other Revenue. e-commerce fee-based In all cases, revenue is recognized only when the price is fixed or determinable, persuasive evidence of an arrangement exists, the service is performed, and collectability of the related fee is reasonably assured. The Company’s arrangements generally do not include a provision for cancellation, termination, or refunds that would significantly impact revenue recognition. The Company accounts for cash consideration given to customers, for which it does not receive a separately identifiable benefit and cannot reasonably estimate fair value, as a reduction to revenue. Current deferred revenue is comprised of contractual billings in excess of recognized revenue and payments received in advance of revenue recognition. Long-term deferred revenue includes amounts received for which revenue will not be earned within the next 12 months. Cost of revenue—TAC. TAC related to the Microsoft Search Agreement was recorded as a reduction to revenue for reporting periods through March 31, 2016. Beginning in the second quarter of 2016, TAC related to the Microsoft Search Agreement is recorded as cost of revenue—TAC in markets that have completed the transition of exclusive sales responsibilities to Microsoft for paid search services to premium advertisers pursuant to the Eleventh Amendment as described above. See Note 19—“Microsoft Search Agreement” for additional information. TAC recorded as cost of revenue—TAC also relates to the Company’s other offerings. The Company enters into Affiliate agreements of varying duration that involve TAC. There are generally two economic structures of the Affiliate agreements: fixed payments with or without a guaranteed minimum amount of traffic delivered or variable payments based on a percentage of the Company’s revenue or based on a certain metric, such as the number of searches or paid clicks. The Company expenses TAC under two different methods. Agreements with fixed payments are expensed ratably over the term the fixed payment covers or as the traffic is delivered. Agreements based on a percentage of revenue, number of searches, or other metrics are expensed based on the volume of the underlying activity or revenue multiplied by the agreed-upon price or rate. 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. Cost of revenue—other. Amortization of Intangibles. Product Development. Advertising Costs. Restructuring Charges. one-time One-time These restructuring initiatives require management to make estimates in several areas including: (i) expenses for severance and other employee separation costs; (ii) realizable values of assets made redundant, obsolete, or excessive; and (iii) the ability to generate sublease income and to terminate lease obligations at the estimated amounts. Stock-Based Compensation Expense. Calculating stock-based compensation expense related to stock options requires the input of highly subjective assumptions, including the expected term of the stock options, stock price volatility, and the pre-vesting pre-vesting The Company uses the “with and without” approach in determining the order in which tax attributes are utilized. As a result, the Company recognizes a tax benefit from stock-based awards in additional paid-in paid-in Recent Accounting Pronouncements. 2014-09, 2015-14, 2014-09. 2016-08 2016-10 2016-12 In August 2014, the FASB issued ASU No. 2014-15, 2014-15 In January 2016, the FASB issued ASU No. 2016-01, available-for-sale 2016-01 available-for-sale In February 2016, the FASB issued ASU 2016-02, right-of-use 2016-02 In March 2016, the FASB issued ASU 2016-06, In March 2016, the FASB issued ASU 2016-07, In March 2016, the FASB issued ASU 2016-09, 2016-09, In June 2016, the FASB issued ASU 2016-13, held-to-maturity available-for-sale available-for-sale In June 2016, the FASB issued ASU 2016-15, “Statement of Cash Flows (Topic 230), a consensus of the FASB’s Emerging Issues Task Force.” The new guidance is intended to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. The ASU is effective for public companies for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including interim periods within those fiscal years. An entity that elects early adoption must adopt all of the amendments in the same period. The guidance requires application using a retrospective transition method. The Company is currently evaluating the effects, if any, that the adoption of this guidance will have on the Company’s consolidated cash flows. In October 2016, the FASB issued ASU 2016-16, In November 2016, the FASB issued ASU No. 2016-18 beginning-of-period end-of-period In January 2017, the FASB issued ASU No. 2017-04

Marketable Securities, Investme

Marketable Securities, Investments and Fair Value Disclosures	12 Months Ended
	Dec. 31, 2016
Marketable Securities, Investments and Fair Value Disclosures	Note 2 Marketable Securities, Investments and Fair Value Disclosures The following tables summarize the available-for-sale December 31, 2015 Cost Basis Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Government and agency securities $ 616,501 $ 24 $ (635 ) $ 615,890 Corporate debt securities, commercial paper, time deposits, and bank certificates of deposit 4,589,799 292 (4,908 ) 4,585,183 Alibaba Group equity securities 2,713,484 28,458,877 — 31,172,361 Hortonworks equity securities 26,246 57,977 — 84,223 Other corporate equity securities 298 — (101 ) 197 Total available-for-sale $ 7,946,328 $ 28,517,170 $ (5,644 ) $ 36,457,854 December 31, 2016 Cost Basis Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Government and agency securities $ 650,344 $ 43 $ (903 ) $ 649,484 Corporate debt securities, commercial paper, time deposits, and bank certificates of deposit 6,144,991 812 (4,655 ) 6,141,148 Alibaba Group equity securities 2,713,484 30,967,395 — 33,680,879 Hortonworks equity securities 26,246 5,713 — 31,959 Other corporate equity securities 8,093 69 (3,057 ) (*) 5,105 Total available-for-sale $ 9,543,158 $ 30,974,032 $ (8,615 ) $ 40,508,575 (*) Relates to the other corporate equity securities in an unrealized loss position for less than 12 months. December 31, 2015 2016 Reported as: Short-term marketable securities $ 4,225,112 $ 5,700,925 Long-term marketable securities 975,961 1,089,707 Investment in Alibaba Group 31,172,361 33,680,879 Other long-term assets and investments 84,420 37,064 Total $ 36,457,854 $ 40,508,575 Short-term, highly liquid investments of $667 million and $415 million as of December 31, 2015 and 2016, respectively, included in cash and cash equivalents on the consolidated balance sheets are not included in the table above as the gross unrealized gains and losses were immaterial as the carrying value approximates fair value because of the short maturity of those instruments. Realized gains and losses from sales of available-for-sale The remaining contractual maturities of available-for-sale December 31, 2015 2016 Due within one year $ 4,225,112 $ 5,700,925 Due after one year through three years 975,961 1,089,707 Total available-for-sale $ 5,201,073 $ 6,790,632 The following tables show all available-for-sale December 31, 2015 Less than 12 Months 12 Months or Longer Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Government and agency securities $ 552,041 $ (635 ) $ — $ — $ 552,041 $ (635 ) Corporate debt securities, commercial paper, and bank certificates of deposit 2,415,347 (4,763 ) 99,214 (145 ) 2,514,561 (4,908 ) Total available-for-sale $ 2,967,388 $ (5,398 ) $ 99,214 $ (145 ) $ 3,066,602 $ (5,543 ) December 31, 2016 Less than 12 Months 12 Months or Longer Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Government and agency securities $ 543,605 $ (903 ) $ — $ — $ 543,605 $ (903 ) Corporate debt securities, commercial paper, and bank certificates of deposit 2,355,935 (4,638 ) 46,438 (17 ) 2,402,373 (4,655 ) Total available-for-sale $ 2,899,540 $ (5,541 ) $ 46,438 $ (17 ) $ 2,945,978 $ (5,558 ) The Company’s investment portfolio includes equity securities of Alibaba Group and 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 held 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 the various marketable securities changes. Investments in instruments that earn a fixed rate or a 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 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, 2015 (in thousands): Fair Value Measurements at Reporting Date Using Assets Level 1 Level 2 Level 3 Total Money market funds (1) $ 386,792 $ — $ — $ 386,792 Available-for-sale Government and agency securities (1) — 635,917 — 635,917 Commercial paper and bank certificates of deposit (1) — 1,844,494 — 1,844,494 Corporate debt securities (1) — 2,918,496 — 2,918,496 Time deposits (1) — 82,703 — 82,703 Available-for-sale Other corporate equity securities (2) 197 — — 197 Alibaba Group equity securities 31,172,361 — — 31,172,361 Hortonworks equity securities (2) 84,223 — — 84,223 Hortonworks warrants — — 78,861 78,861 Foreign currency derivative contracts (3) — 84,319 — 84,319 Financial assets at fair value $ 31,643,573 $ 5,565,929 $ 78,861 $ 37,288,363 Liabilities Foreign currency derivative contracts (3) — (5,661 ) — (5,661 ) Total financial assets and liabilities at fair value $ 31,643,573 $ 5,560,268 $ 78,861 $ 37,282,702 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, 2016 (in thousands): Fair Value Measurements at Reporting Date Using Assets Level 1 Level 2 Level 3 Total Money market funds (1) $ 375,286 $ — $ — $ 375,286 Available-for-sale Government and agency securities (1) — 649,484 — 649,484 Commercial paper and bank certificates of deposit (1) — 3,008,971 — 3,008,971 Corporate debt securities (1) — 3,132,177 — 3,132,177 Time deposits (1) — 39,598 — 39,598 Available-for-sale Other corporate equity securities (2) 5,105 — — 5,105 Alibaba Group equity securities 33,680,879 — — 33,680,879 Hortonworks equity securities (2) 31,959 — — 31,959 Hortonworks warrants — — 28,815 28,815 Foreign currency derivative contracts (3) — 11,684 — 11,684 Financial assets at fair value $ 34,093,229 $ 6,841,914 $ 28,815 $ 40,963,958 Liabilities Foreign currency derivative contracts (3) — (9,333 ) — (9,333 ) Total financial assets and liabilities at fair value $ 34,093,229 $ 6,832,581 $ 28,815 $ 40,954,625 (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 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 consolidated balance sheets. (3) Foreign currency derivative contracts are classified as part of either current or noncurrent assets or liabilities on the consolidated balance sheets. The notional amounts of the foreign currency derivative contracts were: $1.5 billion, including contracts designated as net investment hedges of $1.2 billion, as of December 31, 2015; and $0.6 billion, including contracts designated as net investment hedges of $0.2 billion, as of December 31, 2016. The amount of cash included in cash and cash equivalents as of December 31, 2015 and 2016 was $965 million and $705 million, respectively. 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 for the Company’s Level 3 financial asset was obtained using a Black-Scholes model. Activity between Levels of the Fair Value Hierarchy During the years ended December 31, 2015 and 2016, the Company did not make any transfers between Level 1, Level 2 and Level 3 assets or liabilities. Hortonworks Prior to the December 12, 2014 initial public offering of Hortonworks, the Company held an approximate 16 percent interest in Hortonworks with an investment balance of $26 million, which was accounted for as a cost method investment. Subsequent to the initial public offering, the Company owns 3.8 million unregistered shares. These shares were subject to a 6-month lock-up available-for-sale The Company also holds warrants that vested upon the initial public offering of Hortonworks, which entitle the Company to purchase an aggregate of 3.7 million shares of Hortonworks common stock upon exercise of the warrants. The Company holds 6.5 million preferred warrants that are exercisable for 3.25 million shares of common stock at an exercise price of $0.01 per share, as well as 0.5 million common warrants that are exercisable for 0.5 million shares of common stock at an exercise price of $8.46 per share. These warrants had a fair value of $79 million and $29 million as of December 31, 2015 and 2016, respectively. The Company determined the estimated fair value of the warrants using the Black-Scholes model with the following assumptions: Preferred Warrants Common Warrants Years Ended December 31, Years Ended December 31, 2015 2016 2015 2016 Expected dividend yield 0 % 0 % 0 % 0 % Risk-free interest rate 1.78 % 1.70 % 2.25 % 2.25 % Expected volatility 46.0 % 44.0 % 46.0 % 44.0 % Expected life (in years) 4.50 3.50 7.44 6.44 During the year ended December 31, 2014, the Company recorded a gain of $57 million upon the initial public offering of Hortonworks through other comprehensive income on its consolidated balance sheet and a $41 million gain related to the mark to market of the warrants as of December 31, 2014, which was included within other income (expense), net in the consolidated statements of operations. During the year ended December 31, 2015, the Company recorded a loss of $19 million related to the mark to market of the respective warrants as of December 31, 2015, which was included within other income (expense), net in the Company’s consolidated statements of operations. During the year ended December 31, 2016, the Company recorded a loss of $50 million related to the mark to market of the respective warrants as of December 31, 2016, which was included within other income (expense), net in the Company’s consolidated statements of operations. Changes in the estimated fair value of the Hortonworks warrants are recorded through other income (expense), net in the Company’s consolidated statements of operations. Assets and Liabilities at Fair Value on a Nonrecurring Basis Convertible Senior Notes. Goodwill and Definite-Lived Intangible Assets. Other Investments.

Consolidated Financial Statemen

Consolidated Financial Statement Details	12 Months Ended
	Dec. 31, 2016
Consolidated Financial Statement Details	Note 3 Consolidated Financial Statement Details Prepaid Expenses and Other Current Assets As of December 31, prepaid expenses and other current assets consisted of the following (in thousands): 2015 2016 Prepaid expenses $ 87,843 $ 73,671 Foreign currency forward and option contract assets 84,136 11,684 Other receivables non-trade 167,198 33,519 Restricted cash (*) 29,678 55,168 Income tax receivables 220,996 35,059 Other 12,941 12,398 Total prepaid expenses and other current assets $ 602,792 $ 221,499 (*) The majority of the balance as of December 31, 2015 and 2016 represents customer funds received by the Company in connection with its online e-commerce Property and Equipment, Net As of December 31, property and equipment, net consisted of the following (in thousands): 2015 2016 Land (1) $ 215,740 $ 89,960 Buildings (1)(2) 840,083 935,515 Leasehold improvements (2) 252,985 249,698 Computers and equipment (2) 2,143,413 1,901,619 Capitalized software and labor 643,758 679,902 Furniture and fixtures (1) 86,418 74,526 Assets not yet in use 83,164 15,505 4,265,561 3,946,725 Less: accumulated depreciation and amortization (2) (2,718,238 ) (2,736,788 ) Total property and equipment, net $ 1,547,323 $ 1,209,937 (1) During 2016, the Company completed the sale of certain property located in Santa Clara, California. The total carrying value of the property assets was $126 million, which mostly pertained to the land. (2) The Company recorded assets under capital leases, primarily for computers and equipment and leasehold improvements, which had gross carrying values of $82 million and $57 million as of December 31, 2015 and 2016, respectively. Accumulated amortization related to these capital leases totaled $75 million and $52 million as of December 31, 2015 and 2016, respectively. Other Long-Term Assets and Investments As of December 31, other long-term assets and investments consisted of the following (in thousands): 2015 2016 Deferred income taxes $ 21,745 $ 18,228 Investments in privately-held companies 82,610 82,780 Hortonworks equity securities and warrants 163,084 60,774 Foreign currency forward and option contracts 183 — Other 74,768 44,277 Total other long-term assets and investments $ 342,390 $ 206,059 Other Accrued Expenses and Current Liabilities As of December 31, other accrued expenses and current liabilities consisted of the following (in thousands): 2015 2016 Accrued content, connection, traffic acquisition, and other costs $ 252,612 $ 400,172 Accrued compensation and related expenses 310,111 342,354 Income taxes payable 4,181 6,039 Accrued professional service expenses 40,914 30,827 Accrued sales and marketing related expenses 40,876 13,936 Accrued restructuring costs 40,283 27,041 Current liability for uncertain tax contingencies 12,586 2,409 Other 233,095 183,898 Total other accrued expenses and current liabilities $ 934,658 $ 1,006,676 Deferred and Other Long-Term Tax Liabilities As of December 31, deferred and other long-term tax liabilities consisted of the following (in thousands): 2015 2016 Deferred and other income tax liabilities (1) $ 12,312,013 $ 13,096,849 Long-term liability for uncertain tax contingencies (2) 1,155,178 1,179,605 Total deferred and other long-term tax contingencies $ 13,467,191 $ 14,276,454 Presented as: Deferred tax liabilities related to investment in Alibaba Group (1) $ 12,611,867 $ 13,633,988 Deferred and other long-term tax liabilities $ 855,324 $ 642,466 1) Deferred and other income tax liabilities are presented on a net basis by jurisdiction. The balances as of December 31, 2015 and 2016 include the deferred tax liabilities related to investment in Alibaba Group. 2) Includes interest and penalties. Accumulated Other Comprehensive Income As of December 31, the components of accumulated other comprehensive income were as follows (in thousands): 2015 2016 Unrealized gains on available-for-sale $ 16,918,539 $ 18,376,965 Unrealized gains (losses) on cash flow hedges, net of tax 482 (19 ) Foreign currency translation adjustments, net of tax (342,990 ) 100,947 Accumulated other comprehensive income $ 16,576,031 $ 18,477,893 Noncontrolling Interests As of December 31, noncontrolling interests were as follows (in thousands): 2015 2016 Beginning noncontrolling interests $ 43,755 $ 35,883 Distributions to noncontrolling interests (15,847 ) (5,948 ) Net income attributable to noncontrolling interests 7,975 4,858 Ending noncontrolling interests $ 35,883 $ 34,793 Other Income (Expense), Net Other income (expense), net for 2014, 2015, and 2016 were as follows (in thousands): Years Ended December 31, 2014 2015 2016 Interest and investment income $ 26,309 $ 34,383 $ 60,931 Interest expense (68,851 ) (71,865 ) (73,783 ) Gain on sale of Alibaba Group ADSs 10,319,437 — — Gain (loss) on Hortonworks warrants 98,062 (19,199 ) (50,046 ) Foreign exchange (loss) gain (14,687 ) (22,226 ) 4,282 Other 9,169 3,125 4,700 Total other income (expense), net $ 10,369,439 $ (75,782 ) $ (53,916 ) Interest 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 year ended December 31, 2014 is attributable to the pre-tax During the year ended December 31, 2014, the Company recorded a gain of $57 million upon the initial public offering of Hortonworks and a $41 million gain related to the mark to market of the warrants as of December 31, 2014, which were included within other income (expense), net in the consolidated statements of operations. During the year ended December 31, 2015, the Company recorded a loss of $19 million related to the mark to market of the warrants as of December 31, 2015, which was included within other income (expense), net in the Company’s consolidated statements of operations. During the year ended December 31, 2016, the Company recorded a loss of $50 million related to the mark to market of the warrants as of December 31, 2016, which was included within other income (expense), net in the Company’s consolidated statements of operations. Changes in the estimated fair value of the Hortonworks warrants will be recorded through other income (expense), net in the Company’s consolidated statements of operations. See Note 2—“Marketable Securities, Investments and Fair Value Disclosures” for additional information. Foreign exchange losses consists of foreign exchange gains and losses due to re-measurement non-functional Other consists of gains from other non-operational Reclassifications Out of Accumulated Other Comprehensive Income Reclassifications out of accumulated other comprehensive income for the period ended December 31, 2014 were as follows(in thousands): Amount Affected Line Item in the Realized gains on cash flow hedges, net of tax $ (5,259 ) Revenue Realized gains on available-for-sale (2,218 ) 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 $ (57,778 ) Reclassifications out of accumulated other comprehensive income for the period ended December 31, 2015 were as follows(in thousands): Amount Affected Line Item in the Realized losses on cash flow hedges, net of tax $ 4,421 Revenue Realized losses on available-for-sale 174 Other income (expense), net Total reclassifications for the period $ 4,595 Reclassifications out of accumulated other comprehensive income for the period ended December 31, 2016 were as follows(in thousands): Amount Affected Line Item in the Realized losses on cash flow hedges, net of tax $ 4,298 Revenue Realized losses on available-for-sale 181 Other income (expense), net Realized (gains) losses on foreign currency translation adjustments (“CTA”): Liquidation of foreign subsidiary CTA reclassification 1,110 Restructuring charges, net Liquidation of foreign subsidiary CTA reclassification (21,204 ) Other income (expense), net Total reclassifications for the period $ (15,615 )

Acquisitions and Dispositions

Acquisitions and Dispositions	12 Months Ended
	Dec. 31, 2016
Acquisitions and Dispositions	Note 4 Acquisitions and Dispositions The following table summarizes acquisitions (including business combinations and asset acquisitions) completed during the three years ended December 31, 2016 (in millions): Purchase Goodwill Amortizable 2014 Flurry $ 270 $ 194 $ 55 BrightRoll $ 581 $ 417 $ 113 Other acquisitions $ 66 $ 39 $ 18 2015 Polyvore $ 161 $ 131 $ 19 Other acquisition $ 23 $ 22 $ 5 At the completion date of each acquisition, the Company recorded goodwill where the purchase price exceeded the fair value of the net tangible and identifiable intangible assets acquired. Goodwill is not amortized, but is tested for impairment at the reporting unit level on an annual basis and more frequently if impairment indicators are present. The majority of the goodwill originating from these acquisitions was subsequently impaired in the fourth quarter of 2015. See Note 5—“Goodwill” for results of the goodwill impairment test. Transactions completed in 2014 Flurry. 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 from the date of the acquisition. Separately, 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 from the date of the acquisition. The allocation of the purchase price of the assets acquired and liabilities assumed based on their 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 represented the excess of the purchase price over the estimated fair value of the net tangible and identifiable intangible assets acquired and was not deductible for tax purposes. BrightRoll. The purchase price of $581 million exceeded the estimated fair value of the net tangible and identifiable intangible assets and liabilities acquired and, as a result, the Company recorded goodwill of $417 million in connection with this transaction. Under the terms of the agreement, the Company acquired all of the equity interests (including all outstanding vested options) in BrightRoll and BrightRoll stockholders and vested option holders were paid in cash. Outstanding BrightRoll unvested options were assumed and converted into equivalent awards for Yahoo common stock valued at $25 million, which is being recognized as stock-based compensation expense as the options vest over periods of up to four years from the date of the acquisition. Separately, in connection with the acquisition, the Company issued restricted stock units to employees valued at $78 million, which is being recognized as stock-based compensation expense as the restricted stock units vest over four years from the date of the acquisition and relate to continuing employment. In addition, the transaction resulted in cash consideration of $54 million to be paid to BrightRoll’s founder over three years also provided that he remains an employee of the Company (or a successor company). Such cash payments are being recognized as compensation expense over the three-year service period from the date of the acquisition. The total purchase price of approximately $581 million consisted mainly of cash consideration. The allocation of the purchase price of the assets acquired and liabilities assumed based on their fair values was as follows (in thousands): Cash acquired $ 41,899 Accounts receivable, net 99,330 Other tangible assets acquired 55,923 Amortizable intangible assets: Developed technology 19,400 Customer contracts and related relationships 85,600 Other 8,100 Goodwill 416,580 Total assets acquired 726,832 Liabilities assumed (145,667 ) Total $ 581,165 The amortizable intangible assets have useful lives not exceeding seven 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 $417 million in connection with this transaction. Goodwill represented the excess of the purchase price over the estimated fair value of the net tangible and identifiable intangible assets acquired and was not deductible for tax purposes. Other Acquisitions—Business Combinations. Transactions completed in 2015 Polyvore. 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 from the date of the acquisition. Separately, in connection with the acquisition, the Company is also recognizing stock-based compensation expense of $15 million over a period of four years from the date of the acquisition. 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 held in escrow was issued to the founders, but is subject to forfeiture and will be released over four years from the date of the acquisition provided they remain employees of the Company (or a successor company). The allocation of the purchase price of the assets acquired and liabilities assumed based on their fair values was as follows (in thousands): Cash acquired $ 6,019 Other tangible assets acquired 12,057 Amortizable intangible assets: Developed technology 17,550 Tradename 1,150 Customer contracts and related relationships 225 Goodwill 131,084 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 allocation, the Company recorded goodwill of $131 million in connection with this transaction. Goodwill represented 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 goodwill amount was recorded in the Americas segment. Other Acquisitions— The Company’s business combinations completed during the years ended December 31, 2014 and 2015 did not have a material impact on the Company’s consolidated statements of operations, and therefore proforma disclosures have not been presented. The Company did not make any acquisitions during the year ended December 31, 2016. 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 to existing patents (“Existing Patents”) and $264 million to the license of patents developed or acquired in the five years following the date the Company entered into the agreement (“Capture Period Patents”). The Company recorded $61 million as a gain on the Sold Patents during 2014. 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 $43 million, $86 million, and $86 million in revenue related to the Existing Patents and the Capture Period Patents during the years ended December 31, 2014, 2015, and 2016, respectively. Patent Sale Agreements During 2014, the Company entered into patent sale agreements with a wholly-owned affiliate of Alibaba Group pursuant to which the Company sold certain patents for aggregate consideration of $23.5 million. The gain on sale of these patents are recorded as a part of gain on sale of patents in the consolidated statements of operations. During 2014, the Company entered into a patent sale agreement with Yahoo Japan pursuant to which the Company sold certain patents for aggregate consideration of $18 million. The gain on sale of these patents of $12 million is recorded as a part of gain on sale of patents in the consolidated statements of operations. During 2015 and 2016, the Company sold certain patents and recorded a gain on sale of patents of approximately $11 million and $2 million, respectively. Sale of Santa Clara Property During 2016, the Company entered into a purchase agreement to sell certain property located in Santa Clara, California. The total carrying value of the property assets was $126 million, which mostly pertained to the land, and was reported within the Americas segment. The decision to sell this property was largely based upon a general lack of operational need for the land and recent improvements in market conditions for commercial real estate in the area. The sale under the purchase agreement was finalized on June 16, 2016 for total proceeds of $246 million, net of closing costs of $4 million. During the year ended December 31, 2016, the Company recorded a gain of $120 million, net of closing costs, on the sale of the property assets which is included in gain on sale of patents and land in the Company’s consolidated statements of operations. Pending Sale of the Operating Business to Verizon Communications Inc. On July 23, 2016, the Company entered into a Stock Purchase Agreement (the “Original Stock Purchase Agreement”) with Verizon Communications Inc. (“Verizon”), pursuant to which the Company has agreed to sell, and Verizon has agreed to purchase (the “Sale”), all of the outstanding shares of Yahoo Holdings, Inc., a newly formed wholly-owned subsidiary of the Company (“Yahoo Holdings”) (and prior to the sale of Yahoo Holdings to cause Yahoo Holdings to sell to a foreign subsidiary of Verizon all of the equity interests in a foreign subsidiary of Yahoo Holdings that will hold certain foreign subsidiaries relating to the Company’s operating business), which, immediately prior to the consummation of the Sale, will own the Company’s operating business. Under the Original Stock Purchase Agreement, the aggregate consideration to be paid to the Company by Verizon in connection with the Sale was $4,825,800,000 in cash, subject to certain adjustments as provided in the Original Stock Purchase Agreement. Concurrently with the execution of the Original Stock Purchase Agreement, the Company entered into a Reorganization Agreement (the “Original Reorganization Agreement”) with Yahoo Holdings, pursuant to which the Company will transfer to Yahoo Holdings prior to the consummation of the Sale all of its assets and liabilities relating to its operating business, other than specified excluded assets and retained liabilities (the “Reorganization”). On February 20, 2017, the Company and Verizon entered into an Amendment to Stock Purchase Agreement amending the Original Stock Purchase Agreement (the “SPA Amendment” and, together with the Original Stock Purchase Agreement, the “Amended Stock Purchase Agreement”), and, concurrently with the execution of the SPA Amendment, the Company and Yahoo Holdings entered into an Amendment to Reorganization Agreement amending the Original Reorganization Agreement (the “RA Amendment”). Additionally, concurrently with the execution of the SPA Amendment and the RA Amendment, the Company, Yahoo Holdings, and Verizon entered into a Settlement and Release Agreement (the “Settlement and Release Agreement”). The SPA Amendment, among other things, (i) reduced the consideration to be paid by Verizon to the Company in connection with the Sale by $350,000,000 to $4,475,800,000, (ii) provided that certain data security incidents to which the Company has been subject will be disregarded for purposes of determining whether certain closing conditions have been satisfied and in determining whether a “Business Material Adverse Effect” has occurred, and (iii) provided that the date after which each of Yahoo and Verizon may terminate the Amended Stock Purchase Agreement if the Closing (as defined in the Amended Stock Purchase Agreement) has not occurred has been extended to July 24, 2017. The RA Amendment provides, among other things, that the Company and Verizon will each be responsible for 50 percent of certain post-closing cash liabilities related to certain data security incidents and other data breaches incurred by the Company. Under the terms of the Settlement and Release Agreement, among other things, Verizon released certain claims, subject to certain exceptions, it (and its affiliates and representatives) may have against the Company (or its affiliates and representatives) relating to certain data security incidents and other data breaches incurred by the Company. Upon completion of the Sale, Verizon will also receive for its benefit and that of its current and certain of its future affiliates, a non-exclusive, worldwide, perpetual, royalty-free license to certain intellectual property not core to the operating business held by Excalibur IP, LLC, a wholly-owned subsidiary of the Company (“Excalibur”), that is not being transferred to Yahoo Holdings with the operating business. The excluded assets include the Company’s cash and marketable securities as of the closing of the Sale, the Company’s shares in Alibaba Group and Yahoo Japan, certain other minority equity investments, and all of the equity in Excalibur. The retained liabilities will include the Notes, securityholder litigation, certain director and officer indemnification obligations, and, pursuant to the RA Amendment, 50 percent of certain post-closing cash liabilities related to certain data security incidents and other data breaches incurred by the Company. Following the closing of the Sale, the excluded assets and retained liabilities will remain in the Company which will be renamed Altaba Inc. and will become an independent, publicly traded, management investment company registered under the Investment Company Act of 1940. The closing of the Sale is subject to certain conditions, including, among others, the approval of the Sale by the Company’s stockholders, the closing of the Reorganization, and certain other customary closing conditions.

Goodwill

Goodwill	12 Months Ended
	Dec. 31, 2016
Goodwill	Note 5 Goodwill The changes in the carrying amount of goodwill for the years ended December 31, 2015 and 2016 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 130,450 21,606 — 152,056 Goodwill impairment charge (3,929,576 ) (531,261 ) — (4,460,837 ) Foreign currency translation adjustments (4,207 ) (22,814 ) (8,654 ) (35,675 ) Net balance as of December 31, 2015 $ 518,886 $ — $ 289,228 $ 808,114 Goodwill impairment charge (394,901 ) — — (394,901 ) Foreign currency translation adjustments — — 2,596 2,596 Net balance as of December 31, 2016 $ 123,985 $ — $ 291,824 $ 415,809 (1) Gross goodwill balances for the Americas segment were $4.3 billion as of January 1, 2015 and $4.4 billion as of December 31, 2016. The Americas segment includes accumulated impairment losses of $4.3 billion as of December 31, 2016. (2) Gross goodwill balances for the EMEA segment were $1.2 billion as of January 1, 2015 and December 31, 2016. The EMEA segment includes accumulated impairment losses of $630 million as of January 1, 2015, and $1.2 billion as of December 31, 2016. (3) Gross goodwill balances for the Asia Pacific segment were $457 million as of January 1, 2015 and $451 million as of December 31, 2016. The Asia Pacific segment includes accumulated impairment losses of $159 million as of January 1, 2015 and December 31, 2016. Goodwill Impairment Testing Goodwill is not amortized but is tested for impairment annually (as of October 31) at the reporting unit level or whenever the Company identifies certain triggering events or circumstances that would more likely than not reduce the estimated fair value of a reporting unit below its carrying amount. Events or circumstances that might indicate an interim evaluation is warranted include, among other things, unexpected adverse business conditions, regulatory changes, loss of key personnel and reporting unit and macro-economic factors such as deterioration in general economic conditions, limitations on accessing capital, fluctuations in foreign exchange rates, or other developments in equity and credit markets. Goodwill is tested for impairment at the reporting unit level, which is at or one level below the Company’s operating segments. The Company identified U.S. & Canada, Latin America, and Tumblr as the reporting units below the Americas operating segment; EMEA is the reporting unit as well as the operating segment; and Taiwan, Hong Kong, Australia & New Zealand, India & Southeast Asia as the reporting units below the Asia Pacific operating segment. These operating segments are the same as the Company’s reportable segments. To test for impairment, the Company uses the two-step Step One The first step of the quantitative test involves comparing the estimated fair value of the Company’s reporting units to their carrying values, including goodwill. To estimate fair value, the company uses the market approach, income approach, or a combination of the two. Under the market approach, the Company utilizes publicly-traded comparable company information to determine revenue and earnings multiples that are used to value the Company’s reporting units. Under the income approach, the Company determines fair value based on estimated future cash flows of each reporting unit discounted by an estimated weighted-average cost of capital, reflecting the overall level of inherent risk of a reporting unit and the rate of return an outside investor would expect to earn. The Company bases cash flow projections for each reporting unit using a forecast of cash flows and a terminal value based on the Perpetuity Growth Model. Step Two For any reporting units, where the carrying value exceeds the estimated fair value, as determined in step one, the Company performs step two to measure the amount of impairment, if any. The second step of the quantitative test is performed by comparing the carrying value of the goodwill in the reporting unit to its implied fair value. The implied fair value is calculated by allocating all of the assets and liabilities of the reporting unit, including any unrecognized intangible assets, in a hypothetical analysis that calculates the implied fair value of goodwill in the same manner as if the reporting unit was being acquired in a business combination. An impairment charge is recognized for the excess of the carrying value of goodwill over its implied fair value. 2016 Impairment Testing Interim Test. To test the Tumblr reporting unit for impairment, the Company used the two-step Annual Test. The remaining goodwill related to the Tumblr reporting unit as of December 31, 2016 was $124 million, which is included in the Americas operating segment. As of December 31, 2016, there was also goodwill remaining for Taiwan, Hong Kong, and Australia & New Zealand reporting units, which are included in the Asia Pacific operating segment. 2015 Impairment Testing In 2015, the estimated fair values of the reporting units for all reporting units identified, except for Tumblr and Latin America, were estimated using a combination of a market approach and an income approach, giving equal weighting to each. This combination is deemed to be the most indicative of the reporting units’ estimated fair value in an orderly transaction between market participants and is consistent with the methodology used for the goodwill impairment test in prior years. For the Tumblr reporting unit, the fair value was estimated using an income approach which was deemed to be the most indicative of fair value in an orderly transaction between market participants. For the Latin America reporting unit, the fair value was estimated using the market approach as the income approach yielded negative cash flows and was not deemed to be comparable. The forecast and related assumptions were derived from the most recent annual financial forecast for which the planning process commenced in the fourth quarter of 2015. The estimated fair values of the Company’s Taiwan, Hong Kong, and Australia & New Zealand reporting units exceeded their estimated carrying values and therefore goodwill in those reporting units was not impaired. In 2015, the carrying value exceeded the fair value for the following reporting units: U.S. & Canada, Europe, Tumblr and Latin America. The Company completed an assessment of the implied fair value of these reporting units, which resulted in an impairment of all goodwill for the U.S. & Canada, Europe, and Latin America reporting units and a partial impairment for the Tumblr reporting unit. The Company recorded goodwill impairment charges of $3,692 million, $531 million, $230 million and $8 million, associated with the U.S. & Canada, Europe, Tumblr, and Latin America reporting units, respectively, for the year ended December 31, 2015. The impairments were a result of a combination of factors, including a sustained decrease in the Company’s market capitalization in fourth quarter of 2015 and lower estimated projected revenue and profitability in the near term. The lower estimated projected cash flows and higher discount rates were used to estimate the fair value of each reporting unit affected by such changes. 2014 Impairment Testing In 2014, as a result of the annual goodwill impairment test, the Company concluded that the carrying value of the Middle East reporting unit, included in the EMEA reportable segment, and the carrying value of the India & Southeast Asia reporting unit included in the Asia Pacific reportable segment both exceeded their respective fair values. As required by the second step of the impairment test, the Company performed an allocation of the fair value to all the assets and liabilities of the reporting unit, including identifiable intangible assets, based on their estimated fair values, to determine the implied fair value of goodwill. Accordingly, the Company recorded a goodwill impairment charge related to the Middle East and India & Southeast Asia reporting units of $79 million and $9 million, respectively, during the quarter ended December 31, 2014 for the difference between the carrying value of the goodwill in the reporting unit and its implied fair value with no goodwill remaining in either reporting unit. The impairment resulted from a decline in business conditions in the Middle East and India & Southeast Asia during the latter half of 2014.

Intangible Assets, Net

Intangible Assets, Net	12 Months Ended
	Dec. 31, 2016
Intangible Assets, Net	Note 6 Intangible Assets, Net The following table summarizes the Company’s intangible assets, net (in thousands): December 31, 2015 Gross Carrying Accumulated (*) Net Customer, affiliate, and advertiser related relationships $ 355,568 $ (135,513 ) $ 220,055 Developed technology and patents 170,289 (83,380 ) 86,909 Tradenames, trademarks, and domain names 67,119 (26,814 ) 40,305 Total intangible assets, net $ 592,976 $ (245,707 ) $ 347,269 December 31, 2016 Gross Carrying Accumulated (*) Impairment Net Customer, affiliate, and advertiser related relationships $ 350,896 $ (181,451 ) $ (66,680 ) $ 102,765 Developed technology and patents 128,732 (81,489 ) — 47,243 Tradenames, trademarks, and domain names 66,631 (34,340 ) (20,655 ) 11,636 Total intangible assets, net $ 546,259 $ (297,280 ) $ (87,335 ) $ 161,644 (*) Cumulative foreign currency translation adjustments, reflecting movement in the currencies of the underlying entities, totaled approximately $18 million and $17 million for the years ended as of December 31, 2015 and 2016, respectively. Definite-lived intangible assets are carried at cost and are amortized over their estimated useful lives, generally on a straight-line basis, as follows: • Customer, affiliate, and advertiser related relationships—one to six years; • Developed technology and patents—three to six years; and • Tradenames, trademarks, and domain names—three to seven years. The Company recognized amortization expense for intangible assets of $132 million, $137 million, and $100 million for 2014, 2015, and 2016, respectively, including $65 million, $58 million, and $42 million, respectively, included in cost of revenue-other. Based on the current amount of intangibles subject to amortization, the estimated amortization expense for each of the succeeding years is as follows: 2017: $76 million; 2018: $55 million; 2019: $30 million; and 2020 and after: $1 million. Intangibles Impairment Testing The Company reviews identifiable intangible assets to be held and used for impairment whenever events or changes in circumstances indicate that the carrying value of the assets may not be recoverable. Determination of recoverability is based on the lowest level of identifiable estimated undiscounted cash flows resulting from use of the asset and its eventual disposition. Intangible assets with indefinite useful lives are not amortized but are reviewed for impairment whenever events or changes in circumstances indicate that it is more likely than not that the fair value is less than its carrying amount. If the Company determines that an intangible asset with an indefinite life is more likely than not impaired, a quantitative test comparing the fair value of the indefinite-lived purchased intangible asset with its carrying amount is performed. The Company estimates the fair value of indefinite-lived purchased intangible assets using an income approach. Measurement of any impairment losses on both definite-lived and indefinite-lived intangible assets are based on the excess of the carrying value of the asset over its fair value. As a result of the impairment testing performed in the fourth quarter of 2015, the entire carrying value of the indefinite-lived intangible assets were fully impaired as of December 31, 2015, and the Company did not purchase any indefinite-lived intangibles during 2016. As of December 31, 2016, the Company only had definite-lived intangible assets. 2016 Testing During the second quarter of 2016, the Company reviewed its Tumblr asset group for impairment as there were events and changes in circumstances that indicated that the carrying value of the long-lived assets may not be recoverable. As a result, the Company performed a quantitative test comparing the fair value of the Tumblr long-lived assets with the carrying amounts and recorded a partial impairment charge of $87 million associated with its definite-lived intangible assets, which were included within customer, affiliate, and advertiser related relationships and tradenames, trademarks, and domain names in the Americas segment. In the fourth quarter of 2016, the Company reviewed its definite-lived intangible assets for impairment. No impairment was identified for definite-lived intangibles. 2015 Testing In the fourth quarter of 2015, the Company reviewed both definite-lived and indefinite-lived intangible assets for impairment. No impairment was identified for definite-lived intangibles. For indefinite-lived intangibles, the Company performed a quantitative test comparing the fair value of the indefinite-lived intangible assets with their carrying amount and recorded an impairment charge of $15 million related to certain indefinite-lived intangible assets in the EMEA segment. As a result, the entire carrying value of the indefinite-lived intangible assets was fully impaired as of December 31, 2015.

Basic and Diluted Net Income (L

Basic and Diluted Net Income (Loss) Attributable to Yahoo! Inc. Common Stockholders Per Share	12 Months Ended
	Dec. 31, 2016
Basic and Diluted Net Income (Loss) Attributable to Yahoo! Inc. Common Stockholders Per Share	Note 7 Basic and Diluted Net Income (Loss) Attributable to Yahoo! Inc. Common Stockholders Per Share Basic and diluted net income (loss) 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 (loss) 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, the incremental common shares issuable upon the exercise of stock options, and shares to be purchased under the 1996 Employee Stock Purchase Plan (the “Employee Stock Purchase Plan”). The Company calculates potential tax windfalls and shortfalls by including the impact of deferred tax assets. The Company takes into account the effect on consolidated net income (loss) per share of dilutive securities of entities in which the Company holds equity interests that are accounted for using the equity method. For 2014, potentially dilutive securities representing approximately 3 million 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 (loss) per share also does not include any effect from the note hedges. In future periods, the denominator for diluted net income (loss) 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 reduce 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 (loss) per share (in thousands, except per share amounts): Years Ended December 31, 2014 2015 2016 Basic: Numerator: Net income (loss) attributable to Yahoo! Inc. $ 7,521,731 $ (4,359,082 ) $ (214,321 ) Less: Net income allocated to participating securities (68 ) — (4 ) Net income (loss) attributable to Yahoo! Inc. common stockholders—basic $ 7,521,663 $ (4,359,082 ) $ (214,325 ) Denominator: Weighted average common shares 987,819 939,141 949,843 Net income (loss) attributable to Yahoo! Inc. common stockholders per share—basic $ 7.61 $ (4.64 ) $ (0.23 ) Diluted: Numerator: Net income (loss) attributable to Yahoo! Inc. $ 7,521,731 $ (4,359,082 ) $ (214,321 ) Less: Net income allocated to participating securities (67 ) — — Less: Effect of dilutive securities issued by equity investees (43,689 ) — — Net income (loss) attributable to Yahoo! Inc. common $ 7,477,975 $ (4,359,082 ) $ (214,321 ) Denominator: Denominator for basic calculation 987,819 939,141 949,843 Weighted average effect of Yahoo! Inc. dilutive securities: Restricted stock units 12,365 — — Stock options and employee stock purchase plan (*) 3,924 — — Denominator for diluted calculation 1,004,108 939,141 949,843 Net income (loss) attributable to Yahoo! Inc. common stockholders per share—diluted $ 7.45 $ (4.64 ) $ (0.23 ) (*) At the beginning of the first quarter of 2015, the Company discontinued the offering of the Employee Stock Purchase Plan to its employees. See Note 14—“Employee Benefits” for additional information.

Investments in Equity Interests

Investments in Equity Interests Accounted for Using the Equity Method of Accounting	12 Months Ended
	Dec. 31, 2016
Investments in Equity Interests Accounted for Using the Equity Method of Accounting	Note 8 Investments in Equity Interests Accounted for Using the Equity Method of Accounting The following table summarizes the Company’s investments in equity interests using the equity method of accounting as of December 31, 2015 and 2016 (dollars in thousands): December 31, Percent December 31, Percent Yahoo Japan $ 2,496,657 35.5 % $ 3,192,884 35.5 % Other 6,572 20 % — 0 % Total $ 2,503,229 $ 3,192,884 Yahoo Japan During April 1996, the Company signed a joint venture agreement with Softbank, as amended in September 1997, which formed Yahoo Japan. Yahoo Japan was formed to establish and manage a local version of Yahoo in Japan. The investment in 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 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 consolidated statements of operations. The Company makes adjustments to the earnings in equity interests line in the 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 December 31, 2016. During the years ended December 31, 2014, 2015, and 2016, the Company received cash dividends from Yahoo Japan in the amounts of $84 million, $142 million, and $157 million, net of withholding taxes, respectively, which were recorded as reductions to the Company’s investment in Yahoo Japan. During the year ended December 31, 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 summarized financial information to address differences between IFRS and U.S. GAAP that materially impact the summarized financial information below. Any other differences between U.S. GAAP and IFRS did not have any material impact on the Yahoo Japan’s summarized financial information presented below (in thousands): Twelve Months Ended September 30, 2014 2015 2016 Operating data: Revenue $ 4,046,412 $ 3,769,410 $ 4,368,106 Gross profit $ 3,262,450 $ 2,983,880 $ 3,415,075 Income from operations $ 1,896,368 $ 1,609,403 $ 1,515,171 Net income $ 1,236,583 $ 1,092,657 $ 1,020,168 Net income attributable to Yahoo Japan $ 1,225,221 $ 1,092,048 $ 1,028,076 September 30, 2015 2016 Balance sheet data: Current assets $ 6,150,688 $ 7,155,657 Long-term assets $ 2,430,699 $ 4,332,498 Current liabilities $ 2,003,960 $ 2,866,924 Long-term liabilities $ 245,834 $ 435,253 Noncontrolling interests $ 165,601 $ 209,363 Since acquiring its equity interest in Yahoo Japan, the Company has recorded cumulative earnings in equity interests, net of dividends received and related taxes on dividends, of $3.3 billion, $3.7 billion, and $4 billion as of December 31, 2014, 2015, and 2016, respectively. 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 $253 million, $228 million, and $257 million, respectively, for the years ended December 31, 2014, 2015, and 2016. As of December 31, 2015 and 2016, the Company had net receivable balances from Yahoo Japan of approximately $37 million and $46 million, respectively. Alibaba Group Equity Investment in Alibaba Group. available-for-sale Technology and Intellectual Property License Agreement.

Foreign Currency Derivative Fin

Foreign Currency Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2016
Foreign Currency Derivative Financial Instruments	Note 9 Foreign Currency Derivative Financial Instruments The Company uses derivative financial instruments, primarily forward contracts (and previously including option contracts), to mitigate risk associated with adverse movements in foreign currency exchange rates. The Company records all derivatives in the consolidated balance sheets at fair value, with assets included in prepaid expenses and other current assets or other long-term assets, 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 (expense) 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 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 consolidated statements of operations. For balance sheet hedges, changes in the fair value are recorded in other income (expense), net on the Company’s consolidated statements of operations. The Company has 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 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. after-tax after-tax Cash Flow Hedges. de-designated Not Designated as Hedging Instruments Balance Sheet Hedges. Notional amounts of the Company’s outstanding derivative contracts as of December 31, 2014, 2015, and 2016 (in millions) were as follows: December 31, 2014 2015 2016 Derivatives designated as hedging instruments: Net investment hedge forward and option contracts $ 1,647 $ 1,150 $ 200 Cash flow hedge forwards $ 222 $ 75 $ 19 Derivatives not designated as hedging instruments: Balance sheet hedges $ 243 $ 225 $ 342 Foreign currency derivative activity for the year ended December 31, 2015 was as follows (in millions): Beginning Settlement Gain (Loss) Gain (Loss) Gain Ending Fair Derivatives designated as hedging instruments: Net investment hedges $ 185 $ (117 ) $ 1 $ 5 ( *) $ — $ 74 Cash flow hedges $ 8 $ — $ (1 ) $ (2 ) $ (3 ) $ 2 Derivatives not designated as hedging instruments: Balance sheet hedges $ 4 $ (21 ) $ 19 $ — $ — $ 2 (*) This amount does not reflect the tax impact of $2 million recorded during the twelve months ended December 31, 2015. The $3 million after tax impact of the gain recorded within other comprehensive income (loss) was included in accumulated other comprehensive income on the Company’s consolidated balance sheets as of December 31, 2015. Foreign currency derivative activity for the year ended December 31, 2016 was as follows (in millions): Beginning Settlement Gain (Loss) Gain (Loss) Gain Ending Fair Derivatives designated as hedging instruments: Net investment hedges $ 74 $ (30 ) $ — $ (53 ) ( *) $ — $ (9 ) Cash flow hedges $ 2 $ 5 $ 1 $ (1 ) $ (7 ) $ — Derivatives not designated as hedging instruments: Balance sheet hedges $ 2 $ (4 ) $ 13 $ — $ — $ 11 (*) This amount does not reflect the tax impact of $19 million recorded during the twelve months ended December 31, 2016. The $34 million after tax impact of the loss recorded within other comprehensive income (loss) was included in accumulated other comprehensive income on the Company’s consolidated balance sheets as of December 31, 2016. Foreign currency derivative contracts balance sheet location and ending fair value was as follows (in millions): Balance Sheet December 31, December 31, Derivatives designated as hedging instruments: Net investment hedges Asset (1) $ 79 $ — Liability (2) $ (5 ) $ (9 ) Cash flow hedges Asset (1) $ 2 $ — Liability (2) $ — $ — Derivatives not designated as hedging instruments: Balance sheet hedges Asset (1) $ 3 $ 12 Liability (2) $ (1 ) $ (1 ) (1) Included in prepaid expenses and other current assets or other long-term assets and investments on the consolidated balance sheets. (2) Included in other accrued expenses and current liabilities or other long-term liabilities on the consolidated balance sheets. See the Foreign Currency and Derivative Financial Instruments section within Note 1—“The Company and Summary of Significant Accounting Policies” for additional information.

Credit Agreement

Credit Agreement	12 Months Ended
	Dec. 31, 2016
Credit Agreement	Note 10 Credit Agreement On May 18, 2016, the Company delivered notice to Citibank to terminate its 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) which provided for a $750 million unsecured revolving credit facility. The termination of the credit agreement took effect on May 23, 2016.

Convertible Notes

Convertible Notes	12 Months Ended
	Dec. 31, 2016
Convertible Notes	Note 11 Convertible Notes 0.00% Convertible Senior Notes As of December 31, 2016, the Company had $1.4 billion in principal amount of Notes outstanding. In 2013, the Company issued the Notes. The Notes were sold under a purchase agreement, dated November 20, 2013, with J.P. Morgan Securities LLC and Goldman, Sachs & Co., as representatives of the several initial purchasers named therein (collectively, the “Initial Purchasers”). The Notes were sold to the Initial Purchasers for resale to qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended. In connection with the issuance of the Notes, the Company entered into an indenture (the “Indenture”) with The Bank of New York Mellon Trust Company, N.A., as trustee. Under the Indenture, the Notes are senior unsecured obligations of Yahoo, the Notes do not bear regular interest, and the principal amount of the Notes was issued at par value. 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. 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. Certain corporate events described in the Indenture may increase the conversion rate for holders who elect to convert their Notes in connection with such corporate event should they occur. 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). The conversion spread will be included in the denominator for the computation of diluted net income per common share, using the treasury stock method. As of December 31, 2016, none of the conditions allowing holders of the Notes to convert had been met. In accounting for the issuance of the Notes, the Company separated the Notes into liability and equity components. The carrying amount of the liability component was calculated by measuring the estimated fair value of a similar liability that does not have an associated convertible feature. The carrying amount of the equity component representing the conversion option was determined by deducting the fair value of the liability component from the face value of the Notes as a whole. The excess of the principal amount of the liability component over its carrying amount (“debt discount”) is amortized to interest expense over the term of the Notes using the effective interest method with an effective interest rate of 5.26 percent per annum. The equity component is not remeasured as long as it continues to meet the conditions for equity classification. In accounting for the transaction costs related to the Note issuance, the Company allocated the total amount incurred to the liability and equity components based on their relative values. Issuance costs attributable to the $1.4 billion liability component are being amortized to expense over the term of the Notes, and issuance costs attributable to the $306 million equity component were included with the equity component in stockholders’ equity. Additionally, the Company recorded a deferred tax liability of $37 million on a portion of the equity component transaction costs which are deductible for tax purposes. The Notes consist of the following (in thousands): December 31, 2015 December 31, 2016 Liability component: Principal $ 1,437,500 $ 1,437,500 Less: note discount (204,015 ) (137,555 ) Net carrying amount $ 1,233,485 $ 1,299,945 Equity component (*) $ 305,569 $ 305,569 (*) Recorded on the consolidated balance sheet within additional paid-in The following table sets forth total interest expense recognized related to the Notes (in thousands): Years Ended December 31, 2014 2015 2016 Accretion of convertible note discount $ 59,838 $ 63,061 $ 66,461 The estimated fair value of the Notes, which was determined based on inputs that are observable in the market (Level 2), and the carrying value of debt instruments (the carrying value excludes the equity component of the Notes classified in equity) were as follows (in thousands): December 31, 2015 December 31, 2016 Fair Value Carrying Value Fair Value Carrying Value Convertible senior notes $ 1,250,124 $ 1,233,485 $ 1,314,876 $ 1,299,945 Note Hedge Transactions and Warrant Transactions The Company entered into note hedge transactions with certain option counterparties (the “Counterparties”) to reduce the potential dilution with respect to Yahoo’s common stock upon conversion of the Notes or to offset any cash payment the Company is required to make in excess of the principal amount of converted Notes. Separately, the Company also entered into privately negotiated warrant transactions with the Counterparties giving them the right to purchase common stock from the Company. The warrant transactions could separately have a dilutive effect with respect to Yahoo’s common stock to the extent that the market price per share of its common stock exceeds the strike price of the warrants. The initial strike price of the warrants was $71.24. Counterparties to the warrants may make adjustments to certain terms of the warrants upon the occurrence of specified events, including the announcement of the Stock Purchase Agreement, if the event results in a material change to the trading price of Yahoo’s common stock or the value of the warrants. To date, two Counterparties have given the Company notices of adjustments reducing their warrant exercise prices. The warrants begin to expire in March 2019.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2016
Commitments and Contingencies	Note 12 Commitments and Contingencies Lease Commitments. Rent expense for all operating leases was approximately $86 million, $77 million, and $60 million for 2014, 2015, and 2016, respectively. Many of the Company’s leases contain one or more of the following options which the Company can exercise at the end of the initial lease term: (i) renewal of the lease for a defined number of years at the then fair market rental rate or at a slight discount to the fair market rental rate; (ii) purchase of the property at the then fair market value; or (iii) right of first offer to lease additional space that becomes available. A summary of gross and net lease commitments as of December 31, 2016 was as follows (in millions): Gross Operating Sublease Net Operating Years ending December 31, 2017 $ 103 $ (16) $ 87 2018 75 (12 ) 63 2019 60 (9 ) 51 2020 47 (7 ) 40 2021 37 (5 ) 32 Due after 5 years 86 (2 ) 84 Total gross and net lease commitments $ 408 $ (51 ) $ 357 Capital Lease Commitments Years ending December 31, 2017 $ 11 2018 9 2019 5 2020 — 2021 — Due after 5 years 3 Gross capital lease commitments $ 28 Less: interest 5 Net capital lease commitments included in other accrued expenses and current liabilities and other long-term liabilities $ 23 Affiliate Commitments. Non-cancelable non-cancelable Intellectual Property Rights. Note Payable Obligations. Standby Letters of Credit. Other Commitments. As of December 31, 2016, 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 Legal Contingencies Patent Matters. Stockholder and Securities Matters. Cathy Buch v. David Filo, et al On January 27, 2016, a stockholder action captioned UCFW Local 1500 Pension Fund v. Marissa Mayer, et al On January 24, 2017, a stockholder action captioned Madrack v. Yahoo! Inc., et al. On February 9, 2017, a stockholder derivative action captioned The LR Trust, et al. v. Marissa Mayer, et al On February 16, 2017, a stockholder derivative action captioned Summer v. Marissa Mayer, et al. Bowser v. Marissa Mayer, et al. On February 20, 2017, a stockholder derivative action captioned Oklahoma Firefighters Pension and Retirement System v. Eric Brandt, et al. TCPA Litigation Concerning Yahoo Messenger. General. 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, would not have a material adverse effect on the Company’s consolidated financial position, results of operations or cash flows. Amounts accrued as of December 31, 2016 were not material. 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. Security Incidents Contingencies On September 22, 2016, the Company disclosed that a copy of certain user account information for approximately 500 million user accounts was stolen from Yahoo’s network in late 2014 (the “2014 Security Incident”). On December 14, 2016, the Company disclosed that, based on its outside forensic expert’s analysis of data files provided to the Company in November 2016 by law enforcement, the Company believes an unauthorized third party stole data associated with more than one billion user accounts in August 2013 (the “2013 Security Incident”). In November and December 2016, the Company disclosed that based on an investigation by its outside forensic experts, it believes an unauthorized third party accessed the Company’s proprietary code to learn how to forge certain cookies. The outside forensic experts have identified approximately 32 million user accounts for which they believe forged cookies were used or taken in 2015 and 2016 (the “Cookie Forging Activity”). The 2013 Security Incident, the 2014 Security Incident, and the Cookie Forging Activity are collectively referred to herein as the “Security Incidents.” To date, approximately 43 putative consumer class action lawsuits have been filed against the Company in U.S. federal and state courts, and in foreign courts, relating to the Security Incidents. The plaintiffs, who purport to represent various classes of users, generally claim to have been harmed by the Company’s alleged actions and/or omissions in connection with the Security Incidents and assert a variety of common law and statutory claims seeking monetary damages or other related relief. In addition, as described above, one putative stockholder class action has been filed against the Company and certain current officers of the Company and four stockholder derivative actions have been filed purportedly on behalf of the Company against its current and former directors and officers, each asserting claims related to the Security Incidents. Additional lawsuits and claims related to the Security Incidents may be asserted by or on behalf of users, partners, shareholders, or others seeking damages or other related relief. While a loss from these matters is reasonably possible, the Company cannot reasonably estimate a range of possible losses related to these legal proceedings at this time because the legal proceedings remain in the early stages, alleged damages have not been specified, there is uncertainty as to the likelihood of a class or classes being certified or the ultimate size of any class if certified, and there are significant factual and legal issues to be resolved. Based on current information, the Company does not believe that a loss from these matters is probable and therefore has not recorded an accrual for litigation or other contingencies relating to the Security Incidents. The Company will continue to evaluate information as it becomes known and will record an accrual for estimated losses at the time or times it is determined that a loss is both probable and reasonably estimable.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2016
Stockholders' Equity	Note 13 Stockholders’ Equity The Board has the authority to issue up to 10 million shares of preferred stock and to determine the price, rights, preferences, privileges, and restrictions, including voting rights, of those shares without any further vote or action by the stockholders. Stock Repurchases . 10b5-1 During the year ended December 31, 2016, the Company did not repurchase any of its outstanding shares of common stock. During the year ended December 31, 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. In September and October 2014, the Company entered into two unrelated accelerated share repurchase agreements (“ASR”) with a financial institution to repurchase shares of its common stock. Under the September 2014 agreement, the Company prepaid $1.1 billion and approximately 15 million shares were initially delivered to the Company on September 30, 2014 and are included in treasury stock. Final settlement occurred on October 17, 2014, resulting in a total of approximately 23.5 million shares, inclusive of shares initially delivered, repurchased for $933 million, all of which are included in treasury stock. The Company received a return of cash for the remaining amount not settled in shares of $167 million. Under the October 2014 agreement, the Company prepaid the maximum repurchase amount of $1.0 billion and approximately 15 million shares were initially delivered on October 30, 2014. Final settlement occurred on December 9, 2014, resulting in a total of approximately 16 million shares, inclusive of shares initially delivered, repurchased for $800 million, all of which are included in treasury stock. The Company received a return of cash for the remaining amount not settled in shares of $200 million. Both ASR agreements were entered into pursuant to the Company’s existing share repurchase program. The Company accounted for the September 2014 ASR as two separate transactions: (i) approximately 15 million shares of common stock initially delivered to the Company, and $600 million was accounted for as a treasury stock transaction and (ii) the remaining $500 million unsettled portion of the contract was determined to be a forward contract indexed to the Company’s own common stock. The initial delivery of approximately 15 million shares resulted in an immediate reduction, on the delivery date, of the outstanding shares used to calculate the weighted-average common shares outstanding for basic and diluted net income per share. The Company has determined that the forward contract, indexed to its common stock, met all of the applicable criteria for equity classification. The Company recorded $600 million as treasury stock and recorded $500 million, the implied value of the forward contract, in additional paid-in paid-in paid-in During the year ended December 31, 2014, in addition to the repurchase under the ASR’s, the Company repurchased approximately 62 million shares of its common stock under its stock repurchase program at an average price of $39.30 per share for a total of approximately $2.4 billion. Retirements. paid-in

Employee Benefits

Employee Benefits	12 Months Ended
	Dec. 31, 2016
Employee Benefits	Note 14 Employee Benefits Benefit Plans . Stock Plans . non-statutory Options granted under the Stock Plan before May 19, 2005 generally expire 10 years after the grant date, and options granted after May 19, 2005 generally expire seven years after the grant date. Options generally become exercisable over a four-year period based on continued employment and vest either monthly, quarterly, semi-annually, or annually. The Stock Plan permits the granting of restricted stock and restricted stock units (collectively referred to as “restricted stock awards”). The restricted stock award vesting criteria are generally the passing of time, meeting certain performance-based objectives, or a combination of both, and continued employment through the vesting period (which varies but generally does not exceed four years). Restricted stock award grants are generally measured at fair value on the date of grant based on the number of shares granted and the quoted price of the Company’s common stock. Such value is recognized as an expense over the corresponding service period. The Stock Plan provides for the issuance of a maximum of 784 million shares, of which 96 million shares were still available for award grant purposes as of December 31, 2016. Each share of the Company’s common stock issued in settlement of “full-value awards” (which include all awards other than options and stock appreciation rights) granted on or after June 25, 2009 under the Stock Plan counted as 1.75 shares against the Stock Plan’s share limit. Each share of the Company’s common stock issued in settlement of “full-value awards” granted on or after June 25, 2014 under the Stock Plan is counted as 2.5 shares against the Stock Plan’s share limit. The Directors’ Plan provides for the grant of nonqualified stock options and restricted stock units to non-employee Options granted under the Directors’ Plan before May 25, 2006 generally become exercisable, based on continued service as a director, for initial grants to new directors, in equal monthly installments over four years, and for annual grants, with 25 percent of such options vesting on the one year anniversary of the date of grant and the remaining options vesting in equal monthly installments over the remaining 36-month Restricted stock units granted under the Directors’ Plan generally vest in equal quarterly installments over a one-year one-year Non-employee From time to time, the Company also assumes stock-based awards in connection with corporate mergers and acquisitions, which awards become payable in shares of the Company’s common stock. Employee Stock Purchase Plan . For the years ended December 31, 2014 and 2015 stock-based compensation expense related to the activity under the plan was $12 million and $2 million, respectively. Stock Options Shares Weighted Weighted (in years) Aggregate Outstanding at December 31, 2015 (1) 6,522 $ 18.82 4.03 $ 103,230 Options granted — $ — Options assumed in acquisitions — $ — Options exercised (2) (1,203 ) $ 14.56 Options expired (442 ) $ 18.71 Options cancelled/forfeited (383 ) $ 18.00 Outstanding at December 31, 2016 (1) 4,494 $ 20.04 2.99 $ 92,503 Vested and expected to vest at December 31, 2016 (3) 4,467 $ 18.11 2.98 $ 91,950 Exercisable at December 31, 2016 3,537 $ 18.15 2.77 $ 72,708 (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. (3) The expected to vest options are the result of applying the pre-vesting The weighted average grant date fair values of all options granted and assumed in the years ended December 31, 2014 and 2015 were $31.31 and $20.31, respectively. The Company did not grant any options in 2016. The aggregate intrinsic value in the table above represents the total pre-tax in-the-money in-the-money The total intrinsic values of options exercised in the years ended December 31, 2014, 2015, and 2016 were $167 million, $53 million, and $27 million, respectively. As of December 31, 2016, there was $7 million of unamortized stock-based compensation expense related to unvested stock options, which is expected to be recognized over a weighted average period of 0.9 years. Cash received from option exercises and purchases of shares under the Employee Stock Purchase Plan for the year ended December 31, 2016 was $18 million. The total net tax benefit attributable to stock options exercised in the year ended December 31, 2016 was $6 million. The fair value of option grants, including assumed options from acquisitions, is determined using the Black-Scholes option pricing model with the following weighted average assumptions: Stock Options Purchase Plan (5) Years Ended December 31, Year Ended December 31, 2014 2015 2014 Expected dividend yield (1) 0 % 0 % 0 % Risk-free interest rate (2) 1.4 % 0.9 % 0 % Expected volatility (3) 34.5 % 34.5 % 36.8 % Expected life (in years) (4) 3.83 2.50 0.25 (1) The Company currently has no history or expectation of paying cash dividends on its common stock in the near future. (2) The risk-free interest rate is based on the U.S. Treasury yield for a term consistent with the expected term of the awards in effect at the time of grant. (3) The Company estimates the volatility of its common stock at the date of grant based on the implied volatility of publicly traded options on its common stock, with a term of one year or greater. (4) The expected life of stock options granted under the Plans is based on historical exercise patterns, which the Company believes are representative of future behavior. New grants issued by the Company had an expected life of 4 years in 2014. In 2015 and 2016, the Company did not issue new stock options. Options assumed in acquisitions had expected lives of less than 3 years. (5) During the first quarter of 2015, the Company discontinued the offering of the Employee Stock Purchase Plan to its employees. Restricted Stock and Restricted Stock Units Shares Weighted Average Awarded and unvested at December 31, 2015 (1) 28,739 $ 39.15 Granted (2) 14,893 $ 34.54 Vested (14,427 ) $ 32.49 Cancelled/Forfeited (6,955 ) $ 35.88 Awarded and unvested at December 31, 2016 (1) 22,250 $ 41.40 (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 year ended December 31, 2016 (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 year ended December 31, 2016. As of December 31, 2016, there was $497 million of unamortized stock-based compensation expense related to unvested restricted stock and restricted stock units, which is expected to be recognized over a weighted average period of 2.3 years. The total fair value of restricted stock awards vested during the years ended December 31, 2014, 2015, and 2016 was $415 million, $502 million, and $470 million, respectively. During the year ended December 31, 2016, 14 million shares that were subject to previously granted restricted stock units vested. These vested restricted stock awards were net share settled. The Company withheld 5 million shares 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 $209 million for the year ended December 31, 2016 and are reflected as a financing activity within the 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 In 2014, 2015, and 2016, $150 million, $58 million, and $18 million, respectively, of excess tax benefits from stock-based awards for options exercised and restricted stock awards that vested in current and prior periods were included as a source of cash flows from financing activities. These excess tax benefits represent the reduction in income taxes otherwise payable during the period, attributable to the actual gross tax benefits in excess of the expected tax benefits for options exercised and restricted stock awards that vested in current and prior periods. The Company has accumulated excess tax deductions relating to stock options exercised and restricted stock awards that vested prior to January 1, 2006 available to reduce income taxes otherwise payable. To the extent such deductions reduce income taxes payable in the current year, they are reported as financing activities in the consolidated statements of cash flows. Performance-Based Executive Incentive Equity Awards Performance Options. (one-third), ex-TAC (one-third), (one-third). Performance RSUs. (one-third), ex-TAC (one-third), (one-third).

Restructuring Charges, Net

Restructuring Charges, Net	12 Months Ended
	Dec. 31, 2016
Restructuring Charges, Net	Note 15 Restructuring Charges, Net Restructuring charges, net consists of employee severance pay and related costs, accelerations of stock-based compensation expense, facility restructuring costs, contract termination and other non-cash For the years ended December 31, 2014, 2015, and 2016, restructuring charges, net was comprised of the following (in thousands): Years Ended December 31, 2014 2015 2016 Employee severance pay and related costs $ 30,749 $ 69,042 $ 57,940 Non-cancelable 79,317 36,526 26,126 Reversals of previous charges (3,222 ) (7,404 ) (4,038 ) Non-cash — 2,705 7,374 Other non-cash (3,394 ) 3,150 1,227 Restructuring charges, net $ 103,450 $ 104,019 $ 88,629 Although the Company does not allocate restructuring charges to its segments, the amounts of the restructuring charges relating to each segment are presented below. For the years ended December 31, 2014, 2015, and 2016, restructuring charges, net consists of the following (in thousands): Years Ended December 31, 2014 2015 2016 Americas $ 76,134 $ 68,637 $ 65,300 EMEA 25,612 31,251 19,379 Asia Pacific 1,704 4,131 3,950 Restructuring charges, net $ 103,450 $ 104,019 $ 88,629 The Company has implemented multiple 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. The amounts recorded during the year ended December 31, 2016 were primarily related to the Company’s plan announced in February 2016 to reduce its workforce by approximately 15 percent by the end of 2016 and exit six offices in Dubai, Mexico City, Buenos Aires, Madrid, Milan and Burbank, California, subject to applicable laws and consultation processes, as a part of the strategic plan to simplify the Company’s product portfolio. During the year ended December 31, 2016, in connection with this action, the Company incurred pre-tax pre-tax non-cancelable pre-tax non-cash The Company’s restructuring accrual activity for the years ended December 31, 2015 and 2016 is summarized as follows(in thousands): Total Accrual balance as of December 31, 2014 $ 83,608 Restructuring charges 104,019 Cash paid (114,749 ) Non-cash (2,705 ) Foreign currency translation and other adjustments (4,282 ) Accrual balance as of December 31, 2015 $ 65,891 Restructuring charges 88,629 Cash paid (102,277 ) Non-cash (7,374 ) Foreign currency translation and other adjustments (1,411 ) Accrual balance as of December 31, 2016 $ 43,458 The $43 million restructuring liability as of December 31, 2016 consisted of $3 million for employee severance expenses, which the Company expects to substantially pay out by the end of second quarter of 2017, and $40 million related to non-cancelable As of December 31, restructuring accruals were included on the Company’s consolidated balance sheets as follows (in thousands): 2015 2016 Accrued expenses and other current liabilities $ 40,283 $ 27,041 Other long-term liabilities 25,608 16,417 Total restructuring accruals $ 65,891 $ 43,458 As of December 31, restructuring accruals by segment consisted of the following (in thousands): 2015 2016 Americas $ 47,054 $ 38,041 EMEA 18,389 5,263 Asia Pacific 448 154 Total restructuring accruals $ 65,891 $ 43,458

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2016
Income Taxes	Note 16 Income Taxes The components of income (loss) before income taxes and earnings in equity interests are as follows (in thousands): Years Ended December 31, 2014 2015 2016 United States $ 10,572,290 $ (4,394,462 ) $ (819,838 ) Foreign (59,909 ) (429,814 ) 120,864 Income (loss) before income taxes and earnings in equity interests $ 10,512,381 $ (4,824,276 ) $ (698,974 ) The provision (benefit) for income taxes is composed of the following (in thousands): Years Ended December 31, 2014 2015 2016 Current: United States federal $ 3,067,395 $ (89,498 ) $ 73,484 State 454,261 9,426 (1,619 ) Foreign 50,573 32,815 26,644 Total current provision (benefit) for income taxes $ 3,572,229 $ (47,257 ) $ 98,509 Deferred: United States federal 348,887 (20,507 ) (206,096 ) State 120,938 (31,374 ) (18,007 ) Foreign (3,952 ) 9,540 (634 ) Total deferred provision (benefit) for income taxes $ 465,873 $ (42,341 ) $ (224,737 ) Provision (benefit) for income taxes $ 4,038,102 $ (89,598 ) $ (126,228 ) The provision (benefit) for income taxes differs from the amount computed by applying the federal statutory income tax rate to income before income taxes and earnings in equity interests as follows (in thousands): Years Ended December 31, 2014 2015 2016 Income tax at the U.S. federal statutory rate of 35 percent $ 3,679,333 $ (1,688,496 ) $ (244,641 ) State income taxes, net of federal benefit 400,824 (7,912 ) 2,514 Stock-based compensation expense 8,132 9,508 10,482 Research tax credits (23,775 ) (15,659 ) (17,291 ) Effect of non-U.S. (53,079 ) 165,203 (18,499 ) Settlement with tax authorities (24,870 ) (1,981 ) (8,400 ) Remeasurement of prior year tax positions — (5,286 ) — Acquisition related non-deductible 16,881 15,970 13,059 Tax liquidation of acquired entities — (56,170 ) — Goodwill impairment charge 30,945 1,486,792 138,215 Intangible assets impairment charge — 2,468 — Other 3,711 5,965 (1,667 ) Provision (benefit) for income taxes $ 4,038,102 $ (89,598 ) $ (126,228 ) Deferred income taxes reflect the tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. The components of deferred income tax assets and liabilities are as follows (in thousands): December 31, 2015 2016 Deferred income tax assets: Net operating loss and tax credit carryforwards $ 185,425 $ 136,929 Stock-based compensation expense 34,644 39,211 Non-deductible 114,519 172,224 Deferred revenue 10,153 12,345 Fixed assets 14,096 12,181 Federal benefits relating to tax positions 308,347 336,963 Other 8,580 7,281 Gross deferred income tax assets 675,764 717,134 Valuation allowance (29,001 ) (36,354 ) Deferred income tax assets $ 646,763 $ 680,780 Deferred income tax liabilities: Purchased intangible assets $ (86,905 ) $ (25,833 ) Fixed assets (146,234 ) (89,344 ) Alibaba unrealized gains (12,611,867 ) (13,633,988 ) Unrealized income in investments (85,761 ) (8,837 ) Restructuring liabilities (4,046 ) (95 ) Other (2,216 ) (1,278 ) Deferred income tax liabilities $ (12,937,029 ) $ (13,759,375 ) Net deferred income tax liabilities $ (12,290,266 ) $ (13,078,595 ) As of December 31, 2016, the Company’s federal and California net operating loss carryforwards for income tax purposes were approximately $172 million and $134 million, respectively. The federal and California net operating loss carryforwards are subject to various limitations under Section 382 of the Internal Revenue Code and applicable state tax law. If not utilized, the federal and California net operating loss carryforwards will begin to expire in 2021. In the three months ended March 31, 2015, the Company satisfied the $3.3 billion income tax liability related to the sale by Yahoo! Hong Kong Holdings Limited, the Company’s wholly-owned subsidiary, of Alibaba Group ADSs in the Alibaba Group IPO on September 24, 2014. As of December 31, 2016 the Company accrued deferred tax liabilities of $13.6 billion associated with the 384 million ordinary shares of Alibaba Group (“Alibaba Group shares”) retained by the Company. Such deferred tax liabilities are subject to periodic adjustments due to changes in the fair value of the Alibaba Group shares. The Company’s state research tax credit carryforward for income tax purposes is approximately $200 million and it can be carried forward indefinitely. Tax credit carryforwards that result from the exercise of employee stock options are not recorded on the Company’s consolidated balance sheets and are accounted for as a credit to additional paid-in The Company has a valuation allowance of approximately $29 million and $36 million as of December 31, 2015 and 2016 against certain deferred income tax assets that are not more likely than not to be realized in future periods. In evaluating the Company’s ability to realize its deferred income tax assets, the Company considers all available positive and negative evidence, including operating results, ongoing tax planning, and forecasts of future taxable income on a jurisdiction by jurisdiction basis. The valuation allowance as of December 31, 2016 relates to certain foreign and some U.S. states deferred tax assets that are not more likely than not to be realized. The Company continues to monitor its business strategies, weighing positive and negative evidences in assessing its realization of deferred tax assets. As of December 31, 2016, the Company repatriated cumulative earnings from its wholly-owned foreign subsidiaries and recorded a $17 million tax expense (primarily related to $172 million of dividend income recognizable in the U.S. with an associated $67 million U.S. tax credit for foreign income taxes that have been paid on such earnings) related to this repatriation that is included in “effect of non-U.S. The total amount of gross unrecognized tax benefits was $1.1 billion as of December 31, 2016, of which up to $0.7 billion would affect the Company’s effective tax rate if realized. A reconciliation of the beginning and ending amount of unrecognized tax benefits in 2014, 2015, and 2016 is as follows (in thousands): 2014 2015 2016 Unrecognized tax benefits balance at January 1 $ 695,285 $ 1,023,626 $ 1,067,109 Gross increase for tax positions of prior years 65,606 27,583 10,848 Gross decrease for tax positions of prior years (9,954 ) (17,748 ) (24,529 ) Gross increase for tax positions of current year 358,434 41,428 44,556 Settlements (84,942 ) (4,700 ) (17,957 ) Lapse of statute of limitations (803 ) (3,080 ) (6,278 ) Unrecognized tax benefits balance at December 31 $ 1,023,626 $ 1,067,109 $ 1,073,749 The remaining balances are recorded on the Company’s consolidated balance sheets as follows (in thousands): December 31, 2015 2016 Total unrecognized tax benefits balance $ 1,067,109 $ 1,073,749 Amounts netted against related deferred tax assets (64,601 ) (77,024 ) Unrecognized tax benefits recorded on consolidated balance sheets $ 1,002,508 $ 996,725 Amounts classified as accrued expenses and other current liabilities $ 12,586 $ 2,409 Amounts classified as deferred and other long-term tax liabilities, net 989,922 994,316 Unrecognized tax benefits recorded on consolidated balance sheets $ 1,002,508 $ 996,725 The Company’s gross amount of unrecognized tax benefits as of December 31, 2016 increased by $7 million from the recorded balance as of December 31, 2015 primarily related to transfer prices among entities in different tax jurisdictions. The Company recognizes interest and/or penalties related to uncertain tax positions in income tax expense. To the extent accrued interest and penalties do not ultimately become payable, amounts accrued will be reduced and reflected as a reduction of the overall income tax provision in the period that such determination is made. During 2014, 2015, and 2016, interest and penalties recorded in the consolidated statements of operations were a charge of $83 million, $7 million, and $24 million (including interest paid of $5 million), respectively. The amounts of accrued interest and penalties recorded on the consolidated balance sheets as of December 31, 2015 and 2016 were approximately $167 million and $186 million, respectively. 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 2015. As of December 31, 2016, the Company’s 2011 through 2015 U.S. federal income tax returns are currently under examination. The Company has appealed the proposed California Franchise Tax Board’s adjustments to the 2005 through 2008 returns, but no conclusions have been reached to date. The Company’s 2009 through 2010 California tax returns are currently under examination. The Company’s 2011 through 2015 tax years remain subject to examination by the California Franchise Tax Board for California tax purposes. While 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 adverse 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 $20 million in the next twelve months. 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 2012 and as of December 31, 2016 totals approximately $140 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.

Transactions with Related Parti

Transactions with Related Parties	12 Months Ended
	Dec. 31, 2016
Transactions with Related Parties	Note 17 Transactions with Related Parties Revenue from related parties, excluding Yahoo Japan, represented approximately 1 percent of total revenue for the years ended December 31, 2014, 2015, and 2016. Management believes that the terms of the agreements with these related parties are comparable to the terms obtained in arm’s-length See Note 8—“Investments in Equity Interests Accounted for Using the Equity Method of Accounting” for additional information related to transactions involving Yahoo Japan.

Segments

Segments	12 Months Ended
	Dec. 31, 2016
Segments	Note 18 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 The following tables present summarized information by segment (in thousands): Years Ended December 31, 2014 2015 2016 Revenue by segment (1) Americas $ 3,517,861 $ 3,976,770 $ 4,172,836 EMEA 374,833 343,646 397,768 Asia Pacific 725,439 647,885 598,531 Total Revenue 4,618,133 4,968,301 5,169,135 TAC by segment (1) Americas 166,545 788,725 1,463,221 EMEA 36,867 57,284 144,547 Asia Pacific 14,119 31,505 43,018 Total TAC 217,531 877,514 1,650,786 Revenue ex-TAC Americas 3,351,316 3,188,045 2,709,615 EMEA 337,966 286,362 253,221 Asia Pacific 711,320 616,380 555,513 Total Revenue ex-TAC 4,400,602 4,090,787 3,518,349 Direct costs by segment (2) Americas 249,971 284,875 263,010 EMEA 87,490 95,789 51,597 Asia Pacific 198,910 196,056 185,195 Global operating costs (3) 2,600,577 2,582,235 2,214,842 Gains on sales of patents and land (97,894 ) (11,100 ) (121,559 ) Asset impairment charge — 44,381 — Goodwill impairment charge 88,414 4,460,837 394,901 Intangible assets impairment charge — 15,423 87,335 Depreciation and amortization 606,568 609,613 507,555 Stock-based compensation expense 420,174 457,153 491,902 Restructuring charges, net 103,450 104,019 88,629 Income (loss) from operations $ 142,942 $ (4,748,494 ) $ (645,058 ) (1) Commencing in the second quarter of 2016, TAC payments related to the Microsoft Search Agreement, which previously would have been recorded as a reduction to revenue, began to be recorded as cost of revenue—TAC due to a required change in revenue presentation. See Note 1—“The Company and Summary of Significant Accounting Policies” and Note 19—“Microsoft Search Agreement” for additional information. (2) Direct costs for each segment include certain cost of revenue—other and costs associated with the local sales teams. Prior to the second quarter of 2016, certain account management costs associated with Yahoo Properties were managed locally and included as direct costs for each segment. Prior period amounts have been revised to conform to the current presentation. (3) Global operating costs include product development, marketing, real estate workplace, general and administrative, account management costs, and other corporate expenses that are managed on a global basis and that are not directly attributable to any particular segment. Beginning in the second quarter of 2016, certain account management costs associated with Yahoo Properties are managed globally and included as global costs. Prior period amounts have been revised to conform to the current presentation. Years Ended December 31, 2014 2015 2016 Capital expenditures, net: Americas (1) $ 357,512 $ 490,780 $ (46,455 ) EMEA 20,034 25,479 14,637 Asia Pacific 18,069 26,728 21,140 Total capital expenditures, net $ 395,615 $ 542,987 $ (10,678 ) (1) 2016 includes net proceeds of $246 million associated with the sale of certain property assets located in Santa Clara, California. See Note 4—“Acquisitions and Dispositions” for additional information. December 31, 2015 2016 Property and equipment, net: Americas: U.S. $ 1,447,995 $ 1,120,124 Other 353 3,086 Total Americas $ 1,448,348 $ 1,123,210 EMEA 33,940 28,360 Asia Pacific 65,035 58,367 Total property and equipment, net $ 1,547,323 $ 1,209,937 See also Note 5—“Goodwill” and Note 15—“Restructuring Charges, Net” for additional information regarding segments. Enterprise Wide Disclosures: The following table presents revenue for groups of similar services (in thousands): Years Ended December 31, 2014 2015 2016 Search (1)(2) $ 1,831,985 $ 2,113,848 $ 2,673,100 Display (2) 1,880,117 2,085,754 1,981,535 Other (2) 906,031 768,699 514,500 Total revenue $ 4,618,133 $ 4,968,301 $ 5,169,135 Years Ended December 31, 2014 2015 2016 Revenue (1): U.S. $ 3,380,310 $ 3,865,772 $ 4,048,156 International 1,237,823 1,102,529 1,120,979 Total revenue $ 4,618,133 $ 4,968,301 $ 5,169,135 (1) Commencing in the second quarter of 2016, TAC payments related to the Microsoft Search Agreement, which previously would have been recorded as a reduction to revenue, began to be recorded as cost of revenue—TAC due to a required change in revenue presentation. See Note 1—“The Company and Summary of Significant Accounting Policies” and Note 19—“Microsoft Search Agreement” for additional information. (2) At the beginning of 2016, the Company reclassified certain amounts from other revenue to either search or display revenue. Prior period amounts have been revised to conform to the current presentation as follows: for the year ended December 31, 2014, the Company reclassified $39.1 million and $12.1 million to search and display revenue, respectively, previously included in other revenue; and for the year ended December 31, 2015, the Company reclassified $29.7 million and $11.6 million to search and display revenue, respectively, previously included in other revenue. Revenue is attributed to individual countries according to the online property that generated the revenue. No single foreign country accounted for more than 10 percent of the Company’s revenue in 2014, 2015, and 2016, respectively.

Microsoft Search Agreement

Microsoft Search Agreement	12 Months Ended
	Dec. 31, 2016
Microsoft Search Agreement	Note 19 Microsoft Search Agreement On December 4, 2009, the Company entered into the Microsoft Search Agreement. 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 Microsoft Search Agreement on a market-by-market On April 15, 2015, the Company and Microsoft entered into the Eleventh Amendment, pursuant to which the terms of the Microsoft Search Agreement were amended. Previously under the Microsoft 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 non-exclusive Prior to the Eleventh Amendment, the Company was entitled to receive the Revenue Share Rate with respect to revenue generated from paid search results 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 Microsoft 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 Company is responsible for paying the Affiliate for the Affiliate site’s share of revenue. 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 Microsoft Search Agreement, Yahoo had sales exclusivity for both the Company’s and Microsoft’s premium advertisers. For reporting periods ending December 31, 2014 and 2015, and March 31, 2016, TAC related to the Company’s Microsoft Search Agreement was recorded as a reduction to revenue. Pursuant to the Eleventh Amendment, the Company completed the transition of its exclusive sales responsibilities to Microsoft for Microsoft’s paid search services to premium advertisers in the United States, Canada, and Europe on April 1, 2016 and in its remaining markets (other than Taiwan and Hong Kong) on June 1, 2016. Following the transition in each respective market, Yahoo is considered the principal in the sale of traffic to Microsoft and other customers because Yahoo is the primary obligor in its arrangements with Microsoft and has discretion in how search queries from Affiliate sites will be fulfilled and monetized. As a result, the amounts paid to Affiliates under the Microsoft Search Agreement in the transitioned markets are recorded as cost of revenue—TAC rather than as a reduction to GAAP revenue, resulting in GAAP revenue from the Microsoft Search Agreement being reported on a gross rather than net basis. Effective June 3, 2016, the Company and Microsoft further amended the Microsoft Search Agreement to provide that sales responsibilities for premium advertisers in Taiwan and Hong Kong will not be transitioned. TAC in those markets will continue to be reported as a reduction to revenue. The term of the Microsoft Search Agreement is 10 years from its commencement date, February 23, 2010, subject to earlier termination as provided in the Microsoft Search Agreement. As of October 1, 2015, either the Company or Microsoft may terminate the Microsoft Search Agreement by delivering a written notice of termination to the other party. The Microsoft 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. Approximately 35 percent, 35 percent, and 37 percent of the Company’s revenue for the years ended December 31, 2014, 2015, and 2016, respectively, was attributable to the Microsoft Search Agreement. Commencing in the second quarter of 2016, TAC payments related to the Microsoft Search Agreement for transitioned markets, which previously would have been recorded as a reduction to revenue, began to be recorded as a cost of revenue due to a required change in revenue presentation. During the year ended December 31, 2016, $812 million of GAAP revenue and cost of revenue—TAC was due to the change in revenue presentation. See Note 1—“The Company and Summary of Significant Accounting Policies” for additional information on change in revenue presentation. The Company’s uncollected revenue share in connection with the Microsoft Search Agreement was $267 million and $392 million, which is included in accounts receivable, net, as of December 31, 2015 and 2016, respectively. On December 4, 2009, in connection with entering into the Microsoft 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 non-exclusive.

Schedule II-Valuation and Quali

Schedule II-Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2016
Schedule II-Valuation and Qualifying Accounts	Schedule II—Valuation and Qualifying Accounts Years Ended December 31, 2014, 2015, and 2016 Balance at Beginning of Year Charged to Expenses Write-Offs/ Net of Balance at End of Year (In thousands) Accounts receivable Allowance for doubtful accounts 2014 $ 35,549 $ 15,406 $ (11,156 ) $ 39,799 2015 $ 39,799 $ 26,793 $ (9,089 ) $ 57,503 2016 $ 57,503 $ 14,301 $ (39,267 ) $ 32,537 Balance at Beginning of Year Charged (Credited) to Expenses Charged (Credited) to Other Accounts(*) Balance at End of Year (In thousands) Deferred tax asset valuation allowance 2014 $ 36,690 $ (10,427 ) $ (2,410 ) $ 23,853 2015 $ 23,853 $ 7,150 $ (2,002 ) $ 29,001 2016 $ 29,001 $ 8,369 $ (1,016 ) $ 36,354 (*) Amounts not charged (credited) to expenses are charged (credited) to stockholders’ equity, deferred tax assets (liabilities), or goodwill.

Selected Quarterly Financial Da

Selected Quarterly Financial Data	12 Months Ended
	Dec. 31, 2016
Selected Quarterly Financial Data	Selected Quarterly Financial Data (Unaudited) Quarters Ended March 31, (1) June 30, (2) September 30, (3) December 31, (4) March 31, (5) June 30, (6) September 30, (7) December 31, (8) (In thousands, except per share amounts) Revenue (9) $ 1,225,970 $ 1,243,265 $ 1,225,673 $ 1,273,393 $ 1,087,152 $ 1,307,637 $ 1,305,206 $ 1,469,140 Total operating expenses $ 1,313,324 $ 1,288,059 $ 1,311,985 $ 5,803,427 $ 1,254,366 $ 1,797,313 $ 1,357,525 $ 1,404,989 (Loss) Income from operations $ (87,354 ) $ (44,794 ) $ (86,312 ) $ (4,530,034 ) $ (167,214 ) $ (489,676 ) $ (52,319 ) $ 64,151 Other (expense) income , net $ (31,063 ) $ (11,741 ) $ (23,955 ) $ (9,023 ) $ (47,416 ) $ 15,062 $ (6,122 ) $ (15,440 ) Benefit (provision)for income taxes $ 40,900 $ (58,495 ) $ 93,208 $ 13,985 $ 34,766 $ (15,543 ) $ 105,513 $ 1,492 Earnings in equity interests $ 99,690 $ 95,841 $ 95,195 $ 92,845 $ 81,574 $ 51,777 $ 116,228 $ 113,704 Net income (loss) attributable to Yahoo! Inc. $ 21,198 $ (21,554 ) $ 76,261 $ (4,434,987 ) $ (99,232 ) $ (439,913 ) $ 162,826 $ 161,998 Net income (loss) attributable to Yahoo! Inc. common stockholders per share—basic $ 0.02 $ (0.02 ) $ 0.08 $ (4.70 ) $ (0.10 ) $ (0.46 ) $ 0.17 $ 0.17 Net income (loss) attributable to Yahoo! Inc. common stockholders per share—diluted $ 0.02 $ (0.02 ) $ 0.08 $ (4.70 ) $ (0.10 ) $ (0.46 ) $ 0.17 $ 0.17 Shares used in per share calculation—basic 934,748 937,569 940,822 943,425 945,719 948,432 951,421 953,798 Shares used in per share calculation—diluted 947,976 937,569 946,934 943,425 945,719 948,432 957,304 958,624 (1) Net income attributable to Yahoo! Inc. for the quarter ended March 31, 2015 includes a gain on sale of patents of $2 million, a loss of $12 million due to the decline in fair value of the Hortonworks warrants, and net restructuring charges of $51 million. (2) Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2015 includes a gain on sale of patents of $9 million, a gain of $5 million due to the increase in fair value of the Hortonworks warrants, net restructuring charges of $20 million, and advisory fees of $8 million. (3) Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2015 includes, a loss of $13 million due to the decline in fair value of the Hortonworks warrants, asset impairment charge of $42 million related to the acquired and originally developed content, and net restructuring charges of $26 million. (4) Net loss attributable to Yahoo! Inc. for the quarter ended December 31, 2015 includes goodwill impairment charge of $4.5 billion, asset impairment charge of $2 million related to the originally developed content, intangible assets impairment charge of $15 million, net restructuring charges of $7 million, and advisory fees of $1 million. (5) Net loss attributable to Yahoo! Inc. for the quarter ended March 31, 2016 includes net restructuring charges of $57 million, advisory fees of $9 million and a loss of $39 million due to the decline in fair value of the Hortonworks warrants. (6) Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2016 includes goodwill impairment charge of $395 million and intangible assets impairment charge of $87 million related to Tumblr reporting unit, net restructuring charges of $19 million, advisory fees of $15 million and a gain of $120 million on the sale of land. (7) Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2016 includes advisory fees of $27 million, net restructuring charges of $10 million and a loss of $8 million due to the decline in fair value of the Hortonworks warrants. (8) Net income attributable to Yahoo! Inc. for the quarter ended December 31, 2016 includes security incidents costs of $10 million, advisory fees of $6 million and net restructuring charges of $2 million. (9) Commencing in the second quarter of 2016, TAC payments related to the Microsoft Search Agreement, which previously would have been recorded as a reduction to revenue, began to be recorded as cost of revenue—TAC due to a required change in revenue presentation. See Note 1—“The Company and Summary of Significant Accounting Policies” and Note 19—“Microsoft Search Agreement” in the Notes to the Company’s consolidated financial statements for additional information.

The Company and Summary of Si30

The Company and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2016
Basis of Presentation	Basis of Presentation. 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.
Concentration of Risk	Concentration of Risk. The fair value of the equity investments in Alibaba Group and Hortonworks will vary over time and is subject to a variety of risks including: company performance, macro-economic, regulatory, industry, 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 the Company’s investments in marketable equity securities fluctuates, including Alibaba Group and Hortonworks changes. Accounts receivable are typically unsecured and are derived from revenue earned from customers. The Company performs ongoing credit evaluations of its customers and maintains allowances for potential credit losses. The Company’s derivative instruments, including the convertible note hedge transactions, expose the Company to credit risk to the extent that its derivative counterparties become unable to meet their financial obligations under the terms of the agreements. The Company seeks to mitigate this risk by limiting its derivative counterparties to major financial institutions and by spreading the risk across several major financial institutions. In addition, the potential risk of loss with any one counterparty resulting from this type of credit risk is monitored on an ongoing basis. See “Note 9—Foreign Currency Derivative Financial Instruments” for additional information related to the Company’s derivative instruments. The Company also holds warrants in Hortonworks, which expose the Company to variability in fair value based on changes in the stock price and volatility as inputs to the Black-Scholes model. Revenue under the Company’s Search and Advertising Services and Sales Agreement (as amended, “Microsoft Search Agreement”) with Microsoft Corporation (“Microsoft”) represented approximately 35 percent, 35 percent, and 37 percent of the Company’s revenue for the years ended December 31, 2014, 2015, and 2016, respectively, and no other individual customer accounted for 10 percent or more of the Company’s revenue for 2014, 2015, or 2016. As of December 31, 2015 and 2016, no one customer accounted for 10 percent or more of the accounts receivable balance.
Comprehensive Income (loss)	Comprehensive Income (Loss). available-for-sale,
Foreign Currency	Foreign Currency. case-by-case period-end re-measurement non-functional
Cash and Cash Equivalents, Short- and Long-Term Marketable Securities	Cash and Cash Equivalents, Short- and Long-Term Marketable Securities. Operating cash deposits held with banks may exceed the amount of insurance provided on such deposits. Generally, these deposits may be redeemed upon demand and are maintained with financial institutions with reputable credit and therefore bear limited credit risk. The Company seeks to mitigate its credit risk by spreading such risk across multiple counterparties and monitoring the risk profiles of these counterparties. The Company’s marketable equity securities, including Alibaba Group and Hortonworks, are classified as available-for-sale available-for-sale Realized gains or losses and declines in value judged to be other-than-temporary, if any, on available-for-sale available-for-sale available-for-sale
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts.
Foreign Currency Derivative Financial Instruments	Foreign Currency Derivative Financial Instruments. after-tax after-tax For derivatives designated as cash flow hedges, the effective portion of the unrealized gains or losses on these forward contracts is recorded in accumulated other comprehensive income on the Company’s consolidated balance sheets and reclassified into revenue in the consolidated statements of operations when the underlying hedged revenue is recognized. If the cash flow hedges were to become ineffective, the ineffective portion would be immediately recorded in other income (expense), net in the Company’s consolidated statements of operations. 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 balance sheet hedges are used to partially offset the foreign currency exchange gains and losses generated by the re-measurement non-functional The Company recognizes all derivative instruments as other assets or liabilities on the Company’s consolidated balance sheets at fair value. See Note 9—“Foreign Currency Derivative Financial Instruments” for a full description of the Company’s derivative financial instrument activities and related accounting.
Property and Equipment	Property and Equipment. Property and equipment to be held and used are reviewed for impairment whenever events or changes in circumstances indicate that the carrying value of the assets may not be recoverable. Determination of recoverability is based on the lowest level of identifiable estimated undiscounted future cash flows resulting from the use of the asset and its eventual disposition. Measurement of any impairment loss for long-lived assets that management expects to hold and use is based on the excess of the carrying value of the asset over its fair value. No impairments of such assets were identified during any of the periods presented.
Capitalized Software and Labor	Capitalized Software and Labor. internal-use
Goodwill	Goodwill.
Intangible Assets	Intangible Assets.
Originally Developed Content and Acquired Content	Originally Developed Content and Acquired Content. For originally developed content, the Company performs regular recoverability assessments on a program-by-program For acquired content, the Company compares the net realizable value on a program-by-program
Investments in Equity Interests	Investments in Equity Interests. The Company reviews its investments for other-than-temporary impairment whenever events or changes in business circumstances indicate that the carrying value of the investment may not be fully recoverable. Investments identified as having an indication of impairment are subject to further analysis to determine if the impairment is other-than-temporary and this analysis requires estimating the fair value of the investment. The determination of fair value of the investment involves considering factors such as the stock prices of public companies in which the Company has an equity investment, current economic and market conditions, the operating performance of the companies including current earnings trends and forecasted cash flows, and other company and industry specific information.
Leasing	Leasing. lease-by-lease The Company establishes assets and liabilities for the estimated construction costs incurred under build-to-suit build-to-suit
Income Taxes	Income Taxes. Significant judgment is required in evaluating the Company’s uncertain tax positions and determining its provision for income taxes. The Company establishes liabilities for tax-related tax-related
Revenue Recognition	Revenue Recognition. non-graphical, Search Revenue. end-user On April 15, 2015, the Company and Microsoft Corporation (“Microsoft”) entered into the Eleventh Amendment (the “Eleventh Amendment”) to the Search and Advertising Services and Sales Agreement (“Microsoft Search Agreement”). Pursuant to the Eleventh Amendment, the Company completed the transition of its exclusive sales responsibilities to Microsoft for Microsoft’s paid search services to premium advertisers in the United States, Canada, and Europe on April 1, 2016 and in its remaining markets (other than Taiwan and Hong Kong) on June 1, 2016. Following the transition in each respective market, Yahoo is considered the principal in the sale of traffic to Microsoft and other customers because Yahoo is the primary obligor in its arrangements with Microsoft and has discretion in how search queries from Affiliate sites will be fulfilled and monetized. As a result, amounts paid to Affiliates under the Microsoft Search Agreement in the transitioned markets are recorded as cost of revenue—TAC rather than as a reduction to revenue, resulting in revenue from the Microsoft Search Agreement being reported on a gross rather than net basis. Effective June 3, 2016, the Company and Microsoft further amended the Microsoft Search Agreement to provide that sales responsibilities for premium advertisers in Taiwan and Hong Kong will not be transitioned. TAC in those markets will continue to be reported as a reduction to revenue. The table below presents how the Company accounted for amounts paid to Affiliates related to the Microsoft Search Agreement in transitioned markets, and shows the impact of the implementation of the Eleventh Amendment in transitioned markets (in thousands): Years Ended December 31, 2014 2015 2016 Cost of revenue—TAC in transitioned markets (*) $ — $ — $ 812,105 Reduction to revenue in transitioned markets $ 1,319,242 $ 1,269,134 $ 273,705 (*) For the year ended December 31, 2016, cost of revenue—TAC included $701 million in the Americas segment, $106 million in the EMEA segment, and $5 million in the Asia Pacific segment. See Note 19—“Microsoft Search Agreement” for a description of the Search Agreement with Microsoft. Prior to the Eleventh Amendment, 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 Microsoft 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 Company is responsible for paying the Affiliate for the Affiliate site’s share of revenue. The Company also recognizes search revenue generated from mobile and desktop ads served through Yahoo Gemini (Yahoo’s unified marketplace for search and native advertising on Yahoo Properties and Affiliate sites). The Company is considered the primary obligor to the advertisers who are the customers of the search advertising service. Accordingly, the search revenue generated from mobile and desktop ads served through Yahoo Gemini that involve traffic supplied by Affiliates is reported gross of the traffic acquisition costs (“TAC”) paid to Affiliates (reported as cost of revenue—TAC) as the Company performs the search service for advertisers. In October 2015, Yahoo reached an agreement with Google that provides Yahoo with additional flexibility to choose among suppliers of search results and ads. Google’s offerings complement the search services provided by Microsoft and Yahoo Gemini. Yahoo is considered the principal in the sale of traffic to Google because Yahoo is the primary obligor in its arrangement with Google and has discretion in how search queries from Affiliate sites will be fulfilled and monetized. As a result, amounts paid to Affiliates under the Google agreement are recorded as cost of revenue—TAC. Additionally, the Company generates search revenue from a revenue sharing arrangement with Yahoo Japan for search technology and services and records the related revenue as reported. Display Revenue. From time-to-time, Other Revenue. e-commerce fee-based In all cases, revenue is recognized only when the price is fixed or determinable, persuasive evidence of an arrangement exists, the service is performed, and collectability of the related fee is reasonably assured. The Company’s arrangements generally do not include a provision for cancellation, termination, or refunds that would significantly impact revenue recognition. The Company accounts for cash consideration given to customers, for which it does not receive a separately identifiable benefit and cannot reasonably estimate fair value, as a reduction to revenue. Current deferred revenue is comprised of contractual billings in excess of recognized revenue and payments received in advance of revenue recognition. Long-term deferred revenue includes amounts received for which revenue will not be earned within the next 12 months.
Cost of revenue-TAC	Cost of revenue—TAC. TAC related to the Microsoft Search Agreement was recorded as a reduction to revenue for reporting periods through March 31, 2016. Beginning in the second quarter of 2016, TAC related to the Microsoft Search Agreement is recorded as cost of revenue—TAC in markets that have completed the transition of exclusive sales responsibilities to Microsoft for paid search services to premium advertisers pursuant to the Eleventh Amendment as described above. See Note 19—“Microsoft Search Agreement” for additional information. TAC recorded as cost of revenue—TAC also relates to the Company’s other offerings. The Company enters into Affiliate agreements of varying duration that involve TAC. There are generally two economic structures of the Affiliate agreements: fixed payments with or without a guaranteed minimum amount of traffic delivered or variable payments based on a percentage of the Company’s revenue or based on a certain metric, such as the number of searches or paid clicks. The Company expenses TAC under two different methods. Agreements with fixed payments are expensed ratably over the term the fixed payment covers or as the traffic is delivered. Agreements based on a percentage of revenue, number of searches, or other metrics are expensed based on the volume of the underlying activity or revenue multiplied by the agreed-upon price or rate. 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.
Cost of revenue-other	Cost of revenue—other.
Amortization of Intangibles	Amortization of Intangibles.
Product Development	Product Development.
Advertising Costs	Advertising Costs.
Restructuring Charges	Restructuring Charges. one-time One-time These restructuring initiatives require management to make estimates in several areas including: (i) expenses for severance and other employee separation costs; (ii) realizable values of assets made redundant, obsolete, or excessive; and (iii) the ability to generate sublease income and to terminate lease obligations at the estimated amounts.
Stock-Based Compensation Expense	Stock-Based Compensation Expense. Calculating stock-based compensation expense related to stock options requires the input of highly subjective assumptions, including the expected term of the stock options, stock price volatility, and the pre-vesting pre-vesting The Company uses the “with and without” approach in determining the order in which tax attributes are utilized. As a result, the Company recognizes a tax benefit from stock-based awards in additional paid-in paid-in
Recent Accounting Pronouncements	Recent Accounting Pronouncements. 2014-09, 2015-14, 2014-09. 2016-08 2016-10 2016-12 In August 2014, the FASB issued ASU No. 2014-15, 2014-15 In January 2016, the FASB issued ASU No. 2016-01, available-for-sale 2016-01 available-for-sale In February 2016, the FASB issued ASU 2016-02, right-of-use 2016-02 In March 2016, the FASB issued ASU 2016-06, In March 2016, the FASB issued ASU 2016-07, In March 2016, the FASB issued ASU 2016-09, 2016-09, In June 2016, the FASB issued ASU 2016-13, held-to-maturity available-for-sale available-for-sale In June 2016, the FASB issued ASU 2016-15, “Statement of Cash Flows (Topic 230), a consensus of the FASB’s Emerging Issues Task Force.” The new guidance is intended to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. The ASU is effective for public companies for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including interim periods within those fiscal years. An entity that elects early adoption must adopt all of the amendments in the same period. The guidance requires application using a retrospective transition method. The Company is currently evaluating the effects, if any, that the adoption of this guidance will have on the Company’s consolidated cash flows. In October 2016, the FASB issued ASU 2016-16, In November 2016, the FASB issued ASU No. 2016-18 beginning-of-period end-of-period In January 2017, the FASB issued ASU No. 2017-04

The Company and Summary of Si31

The Company and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2016
Schedule of Amounts Paid to Affiliates	The table below presents how the Company accounted for amounts paid to Affiliates related to the Microsoft Search Agreement in transitioned markets, and shows the impact of the implementation of the Eleventh Amendment in transitioned markets (in thousands): Years Ended December 31, 2014 2015 2016 Cost of revenue—TAC in transitioned markets (*) $ — $ — $ 812,105 Reduction to revenue in transitioned markets $ 1,319,242 $ 1,269,134 $ 273,705 (*) For the year ended December 31, 2016, cost of revenue—TAC included $701 million in the Americas segment, $106 million in the EMEA segment, and $5 million in the Asia Pacific segment.

Marketable Securities, Invest32

Marketable Securities, Investments and Fair Value Disclosures (Tables)	12 Months Ended
	Dec. 31, 2016
Schedule of Available for Sale Securities	The following tables summarize the available-for-sale December 31, 2015 Cost Basis Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Government and agency securities $ 616,501 $ 24 $ (635 ) $ 615,890 Corporate debt securities, commercial paper, time deposits, and bank certificates of deposit 4,589,799 292 (4,908 ) 4,585,183 Alibaba Group equity securities 2,713,484 28,458,877 — 31,172,361 Hortonworks equity securities 26,246 57,977 — 84,223 Other corporate equity securities 298 — (101 ) 197 Total available-for-sale $ 7,946,328 $ 28,517,170 $ (5,644 ) $ 36,457,854 December 31, 2016 Cost Basis Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Government and agency securities $ 650,344 $ 43 $ (903 ) $ 649,484 Corporate debt securities, commercial paper, time deposits, and bank certificates of deposit 6,144,991 812 (4,655 ) 6,141,148 Alibaba Group equity securities 2,713,484 30,967,395 — 33,680,879 Hortonworks equity securities 26,246 5,713 — 31,959 Other corporate equity securities 8,093 69 (3,057 ) (*) 5,105 Total available-for-sale $ 9,543,158 $ 30,974,032 $ (8,615 ) $ 40,508,575 (*) Relates to the other corporate equity securities in an unrealized loss position for less than 12 months.
Schedule of Available for Sale Marketable Securities by Balance Sheet Location	December 31, 2015 2016 Reported as: Short-term marketable securities $ 4,225,112 $ 5,700,925 Long-term marketable securities 975,961 1,089,707 Investment in Alibaba Group 31,172,361 33,680,879 Other long-term assets and investments 84,420 37,064 Total $ 36,457,854 $ 40,508,575
Schedule of Available for Sale Marketable Securities by Contractual Maturities	The remaining contractual maturities of available-for-sale December 31, 2015 2016 Due within one year $ 4,225,112 $ 5,700,925 Due after one year through three years 975,961 1,089,707 Total available-for-sale $ 5,201,073 $ 6,790,632
Available for Sale Marketable Securities in Unrealized Loss Position	The following tables show all available-for-sale December 31, 2015 Less than 12 Months 12 Months or Longer Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Government and agency securities $ 552,041 $ (635 ) $ — $ — $ 552,041 $ (635 ) Corporate debt securities, commercial paper, and bank certificates of deposit 2,415,347 (4,763 ) 99,214 (145 ) 2,514,561 (4,908 ) Total available-for-sale $ 2,967,388 $ (5,398 ) $ 99,214 $ (145 ) $ 3,066,602 $ (5,543 ) December 31, 2016 Less than 12 Months 12 Months or Longer Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Government and agency securities $ 543,605 $ (903 ) $ — $ — $ 543,605 $ (903 ) Corporate debt securities, commercial paper, and bank certificates of deposit 2,355,935 (4,638 ) 46,438 (17 ) 2,402,373 (4,655 ) Total available-for-sale $ 2,899,540 $ (5,541 ) $ 46,438 $ (17 ) $ 2,945,978 $ (5,558 )
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, 2015 (in thousands): Fair Value Measurements at Reporting Date Using Assets Level 1 Level 2 Level 3 Total Money market funds (1) $ 386,792 $ — $ — $ 386,792 Available-for-sale Government and agency securities (1) — 635,917 — 635,917 Commercial paper and bank certificates of deposit (1) — 1,844,494 — 1,844,494 Corporate debt securities (1) — 2,918,496 — 2,918,496 Time deposits (1) — 82,703 — 82,703 Available-for-sale Other corporate equity securities (2) 197 — — 197 Alibaba Group equity securities 31,172,361 — — 31,172,361 Hortonworks equity securities (2) 84,223 — — 84,223 Hortonworks warrants — — 78,861 78,861 Foreign currency derivative contracts (3) — 84,319 — 84,319 Financial assets at fair value $ 31,643,573 $ 5,565,929 $ 78,861 $ 37,288,363 Liabilities Foreign currency derivative contracts (3) — (5,661 ) — (5,661 ) Total financial assets and liabilities at fair value $ 31,643,573 $ 5,560,268 $ 78,861 $ 37,282,702 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, 2016 (in thousands): Fair Value Measurements at Reporting Date Using Assets Level 1 Level 2 Level 3 Total Money market funds (1) $ 375,286 $ — $ — $ 375,286 Available-for-sale Government and agency securities (1) — 649,484 — 649,484 Commercial paper and bank certificates of deposit (1) — 3,008,971 — 3,008,971 Corporate debt securities (1) — 3,132,177 — 3,132,177 Time deposits (1) — 39,598 — 39,598 Available-for-sale Other corporate equity securities (2) 5,105 — — 5,105 Alibaba Group equity securities 33,680,879 — — 33,680,879 Hortonworks equity securities (2) 31,959 — — 31,959 Hortonworks warrants — — 28,815 28,815 Foreign currency derivative contracts (3) — 11,684 — 11,684 Financial assets at fair value $ 34,093,229 $ 6,841,914 $ 28,815 $ 40,963,958 Liabilities Foreign currency derivative contracts (3) — (9,333 ) — (9,333 ) Total financial assets and liabilities at fair value $ 34,093,229 $ 6,832,581 $ 28,815 $ 40,954,625 (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 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 consolidated balance sheets. (3) Foreign currency derivative contracts are classified as part of either current or noncurrent assets or liabilities on the consolidated balance sheets. The notional amounts of the foreign currency derivative contracts were: $1.5 billion, including contracts designated as net investment hedges of $1.2 billion, as of December 31, 2015; and $0.6 billion, including contracts designated as net investment hedges of $0.2 billion, as of December 31, 2016.
Warrant
Assumptions Used to Calculate Value of Warrants	The Company determined the estimated fair value of the warrants using the Black-Scholes model with the following assumptions: Preferred Warrants Common Warrants Years Ended December 31, Years Ended December 31, 2015 2016 2015 2016 Expected dividend yield 0 % 0 % 0 % 0 % Risk-free interest rate 1.78 % 1.70 % 2.25 % 2.25 % Expected volatility 46.0 % 44.0 % 46.0 % 44.0 % Expected life (in years) 4.50 3.50 7.44 6.44

Consolidated Financial Statem33

Consolidated Financial Statement Details (Tables)	12 Months Ended
	Dec. 31, 2016
Prepaid Expenses and Other Current Assets	As of December 31, prepaid expenses and other current assets consisted of the following (in thousands): 2015 2016 Prepaid expenses $ 87,843 $ 73,671 Foreign currency forward and option contract assets 84,136 11,684 Other receivables non-trade 167,198 33,519 Restricted cash (*) 29,678 55,168 Income tax receivables 220,996 35,059 Other 12,941 12,398 Total prepaid expenses and other current assets $ 602,792 $ 221,499 (*) The majority of the balance as of December 31, 2015 and 2016 represents customer funds received by the Company in connection with its online e-commerce
Property and Equipment, Net	As of December 31, property and equipment, net consisted of the following (in thousands): 2015 2016 Land (1) $ 215,740 $ 89,960 Buildings (1)(2) 840,083 935,515 Leasehold improvements (2) 252,985 249,698 Computers and equipment (2) 2,143,413 1,901,619 Capitalized software and labor 643,758 679,902 Furniture and fixtures (1) 86,418 74,526 Assets not yet in use 83,164 15,505 4,265,561 3,946,725 Less: accumulated depreciation and amortization (2) (2,718,238 ) (2,736,788 ) Total property and equipment, net $ 1,547,323 $ 1,209,937 (1) During 2016, the Company completed the sale of certain property located in Santa Clara, California. The total carrying value of the property assets was $126 million, which mostly pertained to the land. (2) The Company recorded assets under capital leases, primarily for computers and equipment and leasehold improvements, which had gross carrying values of $82 million and $57 million as of December 31, 2015 and 2016, respectively. Accumulated amortization related to these capital leases totaled $75 million and $52 million as of December 31, 2015 and 2016, respectively.
Other Long-Term Assets and Investments	As of December 31, other long-term assets and investments consisted of the following (in thousands): 2015 2016 Deferred income taxes $ 21,745 $ 18,228 Investments in privately-held companies 82,610 82,780 Hortonworks equity securities and warrants 163,084 60,774 Foreign currency forward and option contracts 183 — Other 74,768 44,277 Total other long-term assets and investments $ 342,390 $ 206,059
Other Accrued Expenses and Current Liabilities	As of December 31, other accrued expenses and current liabilities consisted of the following (in thousands): 2015 2016 Accrued content, connection, traffic acquisition, and other costs $ 252,612 $ 400,172 Accrued compensation and related expenses 310,111 342,354 Income taxes payable 4,181 6,039 Accrued professional service expenses 40,914 30,827 Accrued sales and marketing related expenses 40,876 13,936 Accrued restructuring costs 40,283 27,041 Current liability for uncertain tax contingencies 12,586 2,409 Other 233,095 183,898 Total other accrued expenses and current liabilities $ 934,658 $ 1,006,676
Deferred and Other Long-Term Tax Liabilities	As of December 31, deferred and other long-term tax liabilities consisted of the following (in thousands): 2015 2016 Deferred and other income tax liabilities (1) $ 12,312,013 $ 13,096,849 Long-term liability for uncertain tax contingencies (2) 1,155,178 1,179,605 Total deferred and other long-term tax contingencies $ 13,467,191 $ 14,276,454 Presented as: Deferred tax liabilities related to investment in Alibaba Group (1) $ 12,611,867 $ 13,633,988 Deferred and other long-term tax liabilities $ 855,324 $ 642,466 1) Deferred and other income tax liabilities are presented on a net basis by jurisdiction. The balances as of December 31, 2015 and 2016 include the deferred tax liabilities related to investment in Alibaba Group. 2) Includes interest and penalties.
Accumulated Other Comprehensive Income	As of December 31, the components of accumulated other comprehensive income were as follows (in thousands): 2015 2016 Unrealized gains on available-for-sale $ 16,918,539 $ 18,376,965 Unrealized gains (losses) on cash flow hedges, net of tax 482 (19 ) Foreign currency translation adjustments, net of tax (342,990 ) 100,947 Accumulated other comprehensive income $ 16,576,031 $ 18,477,893
Noncontrolling Interests	As of December 31, noncontrolling interests were as follows (in thousands): 2015 2016 Beginning noncontrolling interests $ 43,755 $ 35,883 Distributions to noncontrolling interests (15,847 ) (5,948 ) Net income attributable to noncontrolling interests 7,975 4,858 Ending noncontrolling interests $ 35,883 $ 34,793
Other Income (Expense), Net	Other income (expense), net for 2014, 2015, and 2016 were as follows (in thousands): Years Ended December 31, 2014 2015 2016 Interest and investment income $ 26,309 $ 34,383 $ 60,931 Interest expense (68,851 ) (71,865 ) (73,783 ) Gain on sale of Alibaba Group ADSs 10,319,437 — — Gain (loss) on Hortonworks warrants 98,062 (19,199 ) (50,046 ) Foreign exchange (loss) gain (14,687 ) (22,226 ) 4,282 Other 9,169 3,125 4,700 Total other income (expense), net $ 10,369,439 $ (75,782 ) $ (53,916 )
Reclassifications Out of Accumulated Other Comprehensive Income	Reclassifications out of accumulated other comprehensive income for the period ended December 31, 2014 were as follows(in thousands): Amount Affected Line Item in the Realized gains on cash flow hedges, net of tax $ (5,259 ) Revenue Realized gains on available-for-sale (2,218 ) 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 $ (57,778 ) Reclassifications out of accumulated other comprehensive income for the period ended December 31, 2015 were as follows(in thousands): Amount Affected Line Item in the Realized losses on cash flow hedges, net of tax $ 4,421 Revenue Realized losses on available-for-sale 174 Other income (expense), net Total reclassifications for the period $ 4,595 Reclassifications out of accumulated other comprehensive income for the period ended December 31, 2016 were as follows(in thousands): Amount Affected Line Item in the Realized losses on cash flow hedges, net of tax $ 4,298 Revenue Realized losses on available-for-sale 181 Other income (expense), net Realized (gains) losses on foreign currency translation adjustments (“CTA”): Liquidation of foreign subsidiary CTA reclassification 1,110 Restructuring charges, net Liquidation of foreign subsidiary CTA reclassification (21,204 ) Other income (expense), net Total reclassifications for the period $ (15,615 )

Acquisitions and Dispositions (

Acquisitions and Dispositions (Tables)	12 Months Ended
	Dec. 31, 2016
Summary of Significant Acquisitions	The following table summarizes acquisitions (including business combinations and asset acquisitions) completed during the three years ended December 31, 2016 (in millions): Purchase Goodwill Amortizable 2014 Flurry $ 270 $ 194 $ 55 BrightRoll $ 581 $ 417 $ 113 Other acquisitions $ 66 $ 39 $ 18 2015 Polyvore $ 161 $ 131 $ 19 Other acquisition $ 23 $ 22 $ 5
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 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
BrightRoll, Inc.
Allocation of Purchase Price of Assets Acquired And Liabilities Assumed	The total purchase price of approximately $581 million consisted mainly of cash consideration. The allocation of the purchase price of the assets acquired and liabilities assumed based on their fair values was as follows (in thousands): Cash acquired $ 41,899 Accounts receivable, net 99,330 Other tangible assets acquired 55,923 Amortizable intangible assets: Developed technology 19,400 Customer contracts and related relationships 85,600 Other 8,100 Goodwill 416,580 Total assets acquired 726,832 Liabilities assumed (145,667 ) Total $ 581,165
Polyvore, 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 fair values was as follows (in thousands): Cash acquired $ 6,019 Other tangible assets acquired 12,057 Amortizable intangible assets: Developed technology 17,550 Tradename 1,150 Customer contracts and related relationships 225 Goodwill 131,084 Total assets acquired 168,085 Liabilities assumed (7,503 ) Total $ 160,582

Goodwill (Tables)

Goodwill (Tables)	12 Months Ended
	Dec. 31, 2016
Schedule Of Goodwill	The changes in the carrying amount of goodwill for the years ended December 31, 2015 and 2016 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 130,450 21,606 — 152,056 Goodwill impairment charge (3,929,576 ) (531,261 ) — (4,460,837 ) Foreign currency translation adjustments (4,207 ) (22,814 ) (8,654 ) (35,675 ) Net balance as of December 31, 2015 $ 518,886 $ — $ 289,228 $ 808,114 Goodwill impairment charge (394,901 ) — — (394,901 ) Foreign currency translation adjustments — — 2,596 2,596 Net balance as of December 31, 2016 $ 123,985 $ — $ 291,824 $ 415,809 (1) Gross goodwill balances for the Americas segment were $4.3 billion as of January 1, 2015 and $4.4 billion as of December 31, 2016. The Americas segment includes accumulated impairment losses of $4.3 billion as of December 31, 2016. (2) Gross goodwill balances for the EMEA segment were $1.2 billion as of January 1, 2015 and December 31, 2016. The EMEA segment includes accumulated impairment losses of $630 million as of January 1, 2015, and $1.2 billion as of December 31, 2016. (3) Gross goodwill balances for the Asia Pacific segment were $457 million as of January 1, 2015 and $451 million as of December 31, 2016. The Asia Pacific segment includes accumulated impairment losses of $159 million as of January 1, 2015 and December 31, 2016.

Intangible Assets, Net (Tables)

Intangible Assets, Net (Tables)	12 Months Ended
	Dec. 31, 2016
Intangible Assets, Net	The following table summarizes the Company’s intangible assets, net (in thousands): December 31, 2015 Gross Carrying Accumulated (*) Net Customer, affiliate, and advertiser related relationships $ 355,568 $ (135,513 ) $ 220,055 Developed technology and patents 170,289 (83,380 ) 86,909 Tradenames, trademarks, and domain names 67,119 (26,814 ) 40,305 Total intangible assets, net $ 592,976 $ (245,707 ) $ 347,269 December 31, 2016 Gross Carrying Accumulated (*) Impairment Net Customer, affiliate, and advertiser related relationships $ 350,896 $ (181,451 ) $ (66,680 ) $ 102,765 Developed technology and patents 128,732 (81,489 ) — 47,243 Tradenames, trademarks, and domain names 66,631 (34,340 ) (20,655 ) 11,636 Total intangible assets, net $ 546,259 $ (297,280 ) $ (87,335 ) $ 161,644 (*) Cumulative foreign currency translation adjustments, reflecting movement in the currencies of the underlying entities, totaled approximately $18 million and $17 million for the years ended as of December 31, 2015 and 2016, respectively.

Basic and Diluted Net Income 37

Basic and Diluted Net Income (Loss) Attributable to Yahoo! Inc. Common Stockholders Per Share (Tables)	12 Months Ended
	Dec. 31, 2016
Computation of Basic and Diluted Net Income (Loss) Per Share	The following table sets forth the computation of basic and diluted net income (loss) per share (in thousands, except per share amounts): Years Ended December 31, 2014 2015 2016 Basic: Numerator: Net income (loss) attributable to Yahoo! Inc. $ 7,521,731 $ (4,359,082 ) $ (214,321 ) Less: Net income allocated to participating securities (68 ) — (4 ) Net income (loss) attributable to Yahoo! Inc. common stockholders—basic $ 7,521,663 $ (4,359,082 ) $ (214,325 ) Denominator: Weighted average common shares 987,819 939,141 949,843 Net income (loss) attributable to Yahoo! Inc. common stockholders per share—basic $ 7.61 $ (4.64 ) $ (0.23 ) Diluted: Numerator: Net income (loss) attributable to Yahoo! Inc. $ 7,521,731 $ (4,359,082 ) $ (214,321 ) Less: Net income allocated to participating securities (67 ) — — Less: Effect of dilutive securities issued by equity investees (43,689 ) — — Net income (loss) attributable to Yahoo! Inc. common $ 7,477,975 $ (4,359,082 ) $ (214,321 ) Denominator: Denominator for basic calculation 987,819 939,141 949,843 Weighted average effect of Yahoo! Inc. dilutive securities: Restricted stock units 12,365 — — Stock options and employee stock purchase plan (*) 3,924 — — Denominator for diluted calculation 1,004,108 939,141 949,843 Net income (loss) attributable to Yahoo! Inc. common stockholders per share—diluted $ 7.45 $ (4.64 ) $ (0.23 ) (*) At the beginning of the first quarter of 2015, the Company discontinued the offering of the Employee Stock Purchase Plan to its employees. See Note 14—“Employee Benefits” for additional information.

Investments in Equity Interes38

Investments in Equity Interests Accounted for Using the Equity Method of Accounting (Tables)	12 Months Ended
	Dec. 31, 2016
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 as of December 31, 2015 and 2016 (dollars in thousands): December 31, Percent December 31, Percent Yahoo Japan $ 2,496,657 35.5 % $ 3,192,884 35.5 % Other 6,572 20 % — 0 % Total $ 2,503,229 $ 3,192,884
Summarized Financial Information	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 summarized financial information to address differences between IFRS and U.S. GAAP that materially impact the summarized financial information below. Any other differences between U.S. GAAP and IFRS did not have any material impact on the Yahoo Japan’s summarized financial information presented below (in thousands): Twelve Months Ended September 30, 2014 2015 2016 Operating data: Revenue $ 4,046,412 $ 3,769,410 $ 4,368,106 Gross profit $ 3,262,450 $ 2,983,880 $ 3,415,075 Income from operations $ 1,896,368 $ 1,609,403 $ 1,515,171 Net income $ 1,236,583 $ 1,092,657 $ 1,020,168 Net income attributable to Yahoo Japan $ 1,225,221 $ 1,092,048 $ 1,028,076 September 30, 2015 2016 Balance sheet data: Current assets $ 6,150,688 $ 7,155,657 Long-term assets $ 2,430,699 $ 4,332,498 Current liabilities $ 2,003,960 $ 2,866,924 Long-term liabilities $ 245,834 $ 435,253 Noncontrolling interests $ 165,601 $ 209,363

Foreign Currency Derivative F39

Foreign Currency Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2016
Notional Amounts of Company's Outstanding Derivative Contracts	Notional amounts of the Company’s outstanding derivative contracts as of December 31, 2014, 2015, and 2016 (in millions) were as follows: December 31, 2014 2015 2016 Derivatives designated as hedging instruments: Net investment hedge forward and option contracts $ 1,647 $ 1,150 $ 200 Cash flow hedge forwards $ 222 $ 75 $ 19 Derivatives not designated as hedging instruments: Balance sheet hedges $ 243 $ 225 $ 342
Foreign Currency Derivative Activity	Foreign currency derivative activity for the year ended December 31, 2015 was as follows (in millions): Beginning Settlement Gain (Loss) Gain (Loss) Gain Ending Fair Derivatives designated as hedging instruments: Net investment hedges $ 185 $ (117 ) $ 1 $ 5 ( *) $ — $ 74 Cash flow hedges $ 8 $ — $ (1 ) $ (2 ) $ (3 ) $ 2 Derivatives not designated as hedging instruments: Balance sheet hedges $ 4 $ (21 ) $ 19 $ — $ — $ 2 (*) This amount does not reflect the tax impact of $2 million recorded during the twelve months ended December 31, 2015. The $3 million after tax impact of the gain recorded within other comprehensive income (loss) was included in accumulated other comprehensive income on the Company’s consolidated balance sheets as of December 31, 2015. Foreign currency derivative activity for the year ended December 31, 2016 was as follows (in millions): Beginning Settlement Gain (Loss) Gain (Loss) Gain Ending Fair Derivatives designated as hedging instruments: Net investment hedges $ 74 $ (30 ) $ — $ (53 ) ( *) $ — $ (9 ) Cash flow hedges $ 2 $ 5 $ 1 $ (1 ) $ (7 ) $ — Derivatives not designated as hedging instruments: Balance sheet hedges $ 2 $ (4 ) $ 13 $ — $ — $ 11 (*) This amount does not reflect the tax impact of $19 million recorded during the twelve months ended December 31, 2016. The $34 million after tax impact of the loss recorded within other comprehensive income (loss) was included in accumulated other comprehensive income on the Company’s consolidated balance sheets as of December 31, 2016.
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, December 31, Derivatives designated as hedging instruments: Net investment hedges Asset (1) $ 79 $ — Liability (2) $ (5 ) $ (9 ) Cash flow hedges Asset (1) $ 2 $ — Liability (2) $ — $ — Derivatives not designated as hedging instruments: Balance sheet hedges Asset (1) $ 3 $ 12 Liability (2) $ (1 ) $ (1 ) (1) Included in prepaid expenses and other current assets or other long-term assets and investments on the consolidated balance sheets. (2) Included in other accrued expenses and current liabilities or other long-term liabilities on the consolidated balance sheets.

Convertible Notes (Tables)

Convertible Notes (Tables)	12 Months Ended
	Dec. 31, 2016
Schedule of Notes	The Notes consist of the following (in thousands): December 31, 2015 December 31, 2016 Liability component: Principal $ 1,437,500 $ 1,437,500 Less: note discount (204,015 ) (137,555 ) Net carrying amount $ 1,233,485 $ 1,299,945 Equity component (*) $ 305,569 $ 305,569 (*) Recorded on the consolidated balance sheet within additional paid-in
Interest Expense Recognized Related To Notes	The following table sets forth total interest expense recognized related to the Notes (in thousands): Years Ended December 31, 2014 2015 2016 Accretion of convertible note discount $ 59,838 $ 63,061 $ 66,461
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), and the carrying value of debt instruments (the carrying value excludes the equity component of the Notes classified in equity) were as follows (in thousands): December 31, 2015 December 31, 2016 Fair Value Carrying Value Fair Value Carrying Value Convertible senior notes $ 1,250,124 $ 1,233,485 $ 1,314,876 $ 1,299,945

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2016
Lease Commitments	A summary of gross and net lease commitments as of December 31, 2016 was as follows (in millions): Gross Operating Sublease Net Operating Years ending December 31, 2017 $ 103 $ (16) $ 87 2018 75 (12 ) 63 2019 60 (9 ) 51 2020 47 (7 ) 40 2021 37 (5 ) 32 Due after 5 years 86 (2 ) 84 Total gross and net lease commitments $ 408 $ (51 ) $ 357
Capital Lease Commitment	Capital Lease Commitments Years ending December 31, 2017 $ 11 2018 9 2019 5 2020 — 2021 — Due after 5 years 3 Gross capital lease commitments $ 28 Less: interest 5 Net capital lease commitments included in other accrued expenses and current liabilities and other long-term liabilities $ 23

Employee Benefits (Tables)

Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2016
Schedule of Stock Options Activity	Stock option activity under the Company’s Plans for the year ended December 31, 2016 is summarized as follows (in thousands, except years and per share amounts): Shares Weighted Weighted (in years) Aggregate Outstanding at December 31, 2015 (1) 6,522 $ 18.82 4.03 $ 103,230 Options granted — $ — Options assumed in acquisitions — $ — Options exercised (2) (1,203 ) $ 14.56 Options expired (442 ) $ 18.71 Options cancelled/forfeited (383 ) $ 18.00 Outstanding at December 31, 2016 (1) 4,494 $ 20.04 2.99 $ 92,503 Vested and expected to vest at December 31, 2016 (3) 4,467 $ 18.11 2.98 $ 91,950 Exercisable at December 31, 2016 3,537 $ 18.15 2.77 $ 72,708 (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. (3) The expected to vest options are the result of applying the pre-vesting
Schedule of Assumptions used to Calculate Fair Value of Options Granted and Shares Purchased in Employee Stock Purchase Plan	The fair value of option grants, including assumed options from acquisitions, is determined using the Black-Scholes option pricing model with the following weighted average assumptions: Stock Options Purchase Plan (5) Years Ended December 31, Year Ended December 31, 2014 2015 2014 Expected dividend yield (1) 0 % 0 % 0 % Risk-free interest rate (2) 1.4 % 0.9 % 0 % Expected volatility (3) 34.5 % 34.5 % 36.8 % Expected life (in years) (4) 3.83 2.50 0.25 (1) The Company currently has no history or expectation of paying cash dividends on its common stock in the near future. (2) The risk-free interest rate is based on the U.S. Treasury yield for a term consistent with the expected term of the awards in effect at the time of grant. (3) The Company estimates the volatility of its common stock at the date of grant based on the implied volatility of publicly traded options on its common stock, with a term of one year or greater. (4) The expected life of stock options granted under the Plans is based on historical exercise patterns, which the Company believes are representative of future behavior. New grants issued by the Company had an expected life of 4 years in 2014. In 2015 and 2016, the Company did not issue new stock options. Options assumed in acquisitions had expected lives of less than 3 years. (5) During the first quarter of 2015, the Company discontinued the offering of the Employee Stock Purchase Plan to its employees.
Schedule of Restricted Stock and Restricted Stock Units Activity	Restricted Stock and Restricted Stock Units Shares Weighted Average Awarded and unvested at December 31, 2015 (1) 28,739 $ 39.15 Granted (2) 14,893 $ 34.54 Vested (14,427 ) $ 32.49 Cancelled/Forfeited (6,955 ) $ 35.88 Awarded and unvested at December 31, 2016 (1) 22,250 $ 41.40 (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 year ended December 31, 2016 (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 year ended December 31, 2016.

Restructuring Charges, Net (Tab

Restructuring Charges, Net (Tables)	12 Months Ended
	Dec. 31, 2016
Restructuring Charges, Net	For the years ended December 31, 2014, 2015, and 2016, restructuring charges, net was comprised of the following (in thousands): Years Ended December 31, 2014 2015 2016 Employee severance pay and related costs $ 30,749 $ 69,042 $ 57,940 Non-cancelable 79,317 36,526 26,126 Reversals of previous charges (3,222 ) (7,404 ) (4,038 ) Non-cash — 2,705 7,374 Other non-cash (3,394 ) 3,150 1,227 Restructuring charges, net $ 103,450 $ 104,019 $ 88,629
Restructuring Charges by Segment	For the years ended December 31, 2014, 2015, and 2016, restructuring charges, net consists of the following (in thousands): Years Ended December 31, 2014 2015 2016 Americas $ 76,134 $ 68,637 $ 65,300 EMEA 25,612 31,251 19,379 Asia Pacific 1,704 4,131 3,950 Restructuring charges, net $ 103,450 $ 104,019 $ 88,629
Restructuring Accrual Activity	The Company’s restructuring accrual activity for the years ended December 31, 2015 and 2016 is summarized as follows(in thousands): Total Accrual balance as of December 31, 2014 $ 83,608 Restructuring charges 104,019 Cash paid (114,749 ) Non-cash (2,705 ) Foreign currency translation and other adjustments (4,282 ) Accrual balance as of December 31, 2015 $ 65,891 Restructuring charges 88,629 Cash paid (102,277 ) Non-cash (7,374 ) Foreign currency translation and other adjustments (1,411 ) Accrual balance as of December 31, 2016 $ 43,458
Restructuring Accruals by Balance Sheet Classification	As of December 31, restructuring accruals were included on the Company’s consolidated balance sheets as follows (in thousands): 2015 2016 Accrued expenses and other current liabilities $ 40,283 $ 27,041 Other long-term liabilities 25,608 16,417 Total restructuring accruals $ 65,891 $ 43,458
Restructuring Accruals by Segment	As of December 31, restructuring accruals by segment consisted of the following (in thousands): 2015 2016 Americas $ 47,054 $ 38,041 EMEA 18,389 5,263 Asia Pacific 448 154 Total restructuring accruals $ 65,891 $ 43,458

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2016
Schedule Of Components Of Income (Loss) Before Income Taxes And Earnings In Equity Interests	The components of income (loss) before income taxes and earnings in equity interests are as follows (in thousands): Years Ended December 31, 2014 2015 2016 United States $ 10,572,290 $ (4,394,462 ) $ (819,838 ) Foreign (59,909 ) (429,814 ) 120,864 Income (loss) before income taxes and earnings in equity interests $ 10,512,381 $ (4,824,276 ) $ (698,974 )
Schedule Of Provision (Benefit) For Income Taxes	The provision (benefit) for income taxes is composed of the following (in thousands): Years Ended December 31, 2014 2015 2016 Current: United States federal $ 3,067,395 $ (89,498 ) $ 73,484 State 454,261 9,426 (1,619 ) Foreign 50,573 32,815 26,644 Total current provision (benefit) for income taxes $ 3,572,229 $ (47,257 ) $ 98,509 Deferred: United States federal 348,887 (20,507 ) (206,096 ) State 120,938 (31,374 ) (18,007 ) Foreign (3,952 ) 9,540 (634 ) Total deferred provision (benefit) for income taxes $ 465,873 $ (42,341 ) $ (224,737 ) Provision (benefit) for income taxes $ 4,038,102 $ (89,598 ) $ (126,228 )
Schedule Of Effective Income Tax Rate Reconciliation	The provision (benefit) for income taxes differs from the amount computed by applying the federal statutory income tax rate to income before income taxes and earnings in equity interests as follows (in thousands): Years Ended December 31, 2014 2015 2016 Income tax at the U.S. federal statutory rate of 35 percent $ 3,679,333 $ (1,688,496 ) $ (244,641 ) State income taxes, net of federal benefit 400,824 (7,912 ) 2,514 Stock-based compensation expense 8,132 9,508 10,482 Research tax credits (23,775 ) (15,659 ) (17,291 ) Effect of non-U.S. (53,079 ) 165,203 (18,499 ) Settlement with tax authorities (24,870 ) (1,981 ) (8,400 ) Remeasurement of prior year tax positions — (5,286 ) — Acquisition related non-deductible 16,881 15,970 13,059 Tax liquidation of acquired entities — (56,170 ) — Goodwill impairment charge 30,945 1,486,792 138,215 Intangible assets impairment charge — 2,468 — Other 3,711 5,965 (1,667 ) Provision (benefit) for income taxes $ 4,038,102 $ (89,598 ) $ (126,228 )
Schedule Of Deferred Tax Assets And Liabilities	Deferred income taxes reflect the tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. The components of deferred income tax assets and liabilities are as follows (in thousands): December 31, 2015 2016 Deferred income tax assets: Net operating loss and tax credit carryforwards $ 185,425 $ 136,929 Stock-based compensation expense 34,644 39,211 Non-deductible 114,519 172,224 Deferred revenue 10,153 12,345 Fixed assets 14,096 12,181 Federal benefits relating to tax positions 308,347 336,963 Other 8,580 7,281 Gross deferred income tax assets 675,764 717,134 Valuation allowance (29,001 ) (36,354 ) Deferred income tax assets $ 646,763 $ 680,780 Deferred income tax liabilities: Purchased intangible assets $ (86,905 ) $ (25,833 ) Fixed assets (146,234 ) (89,344 ) Alibaba unrealized gains (12,611,867 ) (13,633,988 ) Unrealized income in investments (85,761 ) (8,837 ) Restructuring liabilities (4,046 ) (95 ) Other (2,216 ) (1,278 ) Deferred income tax liabilities $ (12,937,029 ) $ (13,759,375 ) Net deferred income tax liabilities $ (12,290,266 ) $ (13,078,595 )
Reconciliation Of Beginning And Ending Amount Of Unrecognized Tax Benefits	A reconciliation of the beginning and ending amount of unrecognized tax benefits in 2014, 2015, and 2016 is as follows (in thousands): 2014 2015 2016 Unrecognized tax benefits balance at January 1 $ 695,285 $ 1,023,626 $ 1,067,109 Gross increase for tax positions of prior years 65,606 27,583 10,848 Gross decrease for tax positions of prior years (9,954 ) (17,748 ) (24,529 ) Gross increase for tax positions of current year 358,434 41,428 44,556 Settlements (84,942 ) (4,700 ) (17,957 ) Lapse of statute of limitations (803 ) (3,080 ) (6,278 ) Unrecognized tax benefits balance at December 31 $ 1,023,626 $ 1,067,109 $ 1,073,749
Summary Of Remaining Balances Of Unrecognized Tax Benefits	The remaining balances are recorded on the Company’s consolidated balance sheets as follows (in thousands): December 31, 2015 2016 Total unrecognized tax benefits balance $ 1,067,109 $ 1,073,749 Amounts netted against related deferred tax assets (64,601 ) (77,024 ) Unrecognized tax benefits recorded on consolidated balance sheets $ 1,002,508 $ 996,725 Amounts classified as accrued expenses and other current liabilities $ 12,586 $ 2,409 Amounts classified as deferred and other long-term tax liabilities, net 989,922 994,316 Unrecognized tax benefits recorded on consolidated balance sheets $ 1,002,508 $ 996,725

Segments (Tables)

Segments (Tables)	12 Months Ended
	Dec. 31, 2016
Segment Information	The following tables present summarized information by segment (in thousands): Years Ended December 31, 2014 2015 2016 Revenue by segment (1) Americas $ 3,517,861 $ 3,976,770 $ 4,172,836 EMEA 374,833 343,646 397,768 Asia Pacific 725,439 647,885 598,531 Total Revenue 4,618,133 4,968,301 5,169,135 TAC by segment (1) Americas 166,545 788,725 1,463,221 EMEA 36,867 57,284 144,547 Asia Pacific 14,119 31,505 43,018 Total TAC 217,531 877,514 1,650,786 Revenue ex-TAC Americas 3,351,316 3,188,045 2,709,615 EMEA 337,966 286,362 253,221 Asia Pacific 711,320 616,380 555,513 Total Revenue ex-TAC 4,400,602 4,090,787 3,518,349 Direct costs by segment (2) Americas 249,971 284,875 263,010 EMEA 87,490 95,789 51,597 Asia Pacific 198,910 196,056 185,195 Global operating costs (3) 2,600,577 2,582,235 2,214,842 Gains on sales of patents and land (97,894 ) (11,100 ) (121,559 ) Asset impairment charge — 44,381 — Goodwill impairment charge 88,414 4,460,837 394,901 Intangible assets impairment charge — 15,423 87,335 Depreciation and amortization 606,568 609,613 507,555 Stock-based compensation expense 420,174 457,153 491,902 Restructuring charges, net 103,450 104,019 88,629 Income (loss) from operations $ 142,942 $ (4,748,494 ) $ (645,058 ) (1) Commencing in the second quarter of 2016, TAC payments related to the Microsoft Search Agreement, which previously would have been recorded as a reduction to revenue, began to be recorded as cost of revenue—TAC due to a required change in revenue presentation. See Note 1—“The Company and Summary of Significant Accounting Policies” and Note 19—“Microsoft Search Agreement” for additional information. (2) Direct costs for each segment include certain cost of revenue—other and costs associated with the local sales teams. Prior to the second quarter of 2016, certain account management costs associated with Yahoo Properties were managed locally and included as direct costs for each segment. Prior period amounts have been revised to conform to the current presentation. (3) Global operating costs include product development, marketing, real estate workplace, general and administrative, account management costs, and other corporate expenses that are managed on a global basis and that are not directly attributable to any particular segment. Beginning in the second quarter of 2016, certain account management costs associated with Yahoo Properties are managed globally and included as global costs. Prior period amounts have been revised to conform to the current presentation.
Capital Expenditures by Segment	Years Ended December 31, 2014 2015 2016 Capital expenditures, net: Americas (1) $ 357,512 $ 490,780 $ (46,455 ) EMEA 20,034 25,479 14,637 Asia Pacific 18,069 26,728 21,140 Total capital expenditures, net $ 395,615 $ 542,987 $ (10,678 ) (1) 2016 includes net proceeds of $246 million associated with the sale of certain property assets located in Santa Clara, California. See Note 4—“Acquisitions and Dispositions” for additional information.
Property and Equipment, Net by Segment	December 31, 2015 2016 Property and equipment, net: Americas: U.S. $ 1,447,995 $ 1,120,124 Other 353 3,086 Total Americas $ 1,448,348 $ 1,123,210 EMEA 33,940 28,360 Asia Pacific 65,035 58,367 Total property and equipment, net $ 1,547,323 $ 1,209,937
Enterprise Wide Disclosures Revenues for Groups of Similar Services	The following table presents revenue for groups of similar services (in thousands): Years Ended December 31, 2014 2015 2016 Search (1)(2) $ 1,831,985 $ 2,113,848 $ 2,673,100 Display (2) 1,880,117 2,085,754 1,981,535 Other (2) 906,031 768,699 514,500 Total revenue $ 4,618,133 $ 4,968,301 $ 5,169,135 Years Ended December 31, 2014 2015 2016 Revenue (1): U.S. $ 3,380,310 $ 3,865,772 $ 4,048,156 International 1,237,823 1,102,529 1,120,979 Total revenue $ 4,618,133 $ 4,968,301 $ 5,169,135 (1) Commencing in the second quarter of 2016, TAC payments related to the Microsoft Search Agreement, which previously would have been recorded as a reduction to revenue, began to be recorded as cost of revenue—TAC due to a required change in revenue presentation. See Note 1—“The Company and Summary of Significant Accounting Policies” and Note 19—“Microsoft Search Agreement” for additional information. (2) At the beginning of 2016, the Company reclassified certain amounts from other revenue to either search or display revenue. Prior period amounts have been revised to conform to the current presentation as follows: for the year ended December 31, 2014, the Company reclassified $39.1 million and $12.1 million to search and display revenue, respectively, previously included in other revenue; and for the year ended December 31, 2015, the Company reclassified $29.7 million and $11.6 million to search and display revenue, respectively, previously included in other revenue.

Selected Quarterly Financial 46

Selected Quarterly Financial Data (Tables)	12 Months Ended
	Dec. 31, 2016
Schedule of Selected Quarterly Financial Data	Selected Quarterly Financial Data (Unaudited) Quarters Ended March 31, (1) June 30, (2) September 30, (3) December 31, (4) March 31, (5) June 30, (6) September 30, (7) December 31, (8) (In thousands, except per share amounts) Revenue (9) $ 1,225,970 $ 1,243,265 $ 1,225,673 $ 1,273,393 $ 1,087,152 $ 1,307,637 $ 1,305,206 $ 1,469,140 Total operating expenses $ 1,313,324 $ 1,288,059 $ 1,311,985 $ 5,803,427 $ 1,254,366 $ 1,797,313 $ 1,357,525 $ 1,404,989 (Loss) Income from operations $ (87,354 ) $ (44,794 ) $ (86,312 ) $ (4,530,034 ) $ (167,214 ) $ (489,676 ) $ (52,319 ) $ 64,151 Other (expense) income , net $ (31,063 ) $ (11,741 ) $ (23,955 ) $ (9,023 ) $ (47,416 ) $ 15,062 $ (6,122 ) $ (15,440 ) Benefit (provision)for income taxes $ 40,900 $ (58,495 ) $ 93,208 $ 13,985 $ 34,766 $ (15,543 ) $ 105,513 $ 1,492 Earnings in equity interests $ 99,690 $ 95,841 $ 95,195 $ 92,845 $ 81,574 $ 51,777 $ 116,228 $ 113,704 Net income (loss) attributable to Yahoo! Inc. $ 21,198 $ (21,554 ) $ 76,261 $ (4,434,987 ) $ (99,232 ) $ (439,913 ) $ 162,826 $ 161,998 Net income (loss) attributable to Yahoo! Inc. common stockholders per share—basic $ 0.02 $ (0.02 ) $ 0.08 $ (4.70 ) $ (0.10 ) $ (0.46 ) $ 0.17 $ 0.17 Net income (loss) attributable to Yahoo! Inc. common stockholders per share—diluted $ 0.02 $ (0.02 ) $ 0.08 $ (4.70 ) $ (0.10 ) $ (0.46 ) $ 0.17 $ 0.17 Shares used in per share calculation—basic 934,748 937,569 940,822 943,425 945,719 948,432 951,421 953,798 Shares used in per share calculation—diluted 947,976 937,569 946,934 943,425 945,719 948,432 957,304 958,624 (1) Net income attributable to Yahoo! Inc. for the quarter ended March 31, 2015 includes a gain on sale of patents of $2 million, a loss of $12 million due to the decline in fair value of the Hortonworks warrants, and net restructuring charges of $51 million. (2) Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2015 includes a gain on sale of patents of $9 million, a gain of $5 million due to the increase in fair value of the Hortonworks warrants, net restructuring charges of $20 million, and advisory fees of $8 million. (3) Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2015 includes, a loss of $13 million due to the decline in fair value of the Hortonworks warrants, asset impairment charge of $42 million related to the acquired and originally developed content, and net restructuring charges of $26 million. (4) Net loss attributable to Yahoo! Inc. for the quarter ended December 31, 2015 includes goodwill impairment charge of $4.5 billion, asset impairment charge of $2 million related to the originally developed content, intangible assets impairment charge of $15 million, net restructuring charges of $7 million, and advisory fees of $1 million. (5) Net loss attributable to Yahoo! Inc. for the quarter ended March 31, 2016 includes net restructuring charges of $57 million, advisory fees of $9 million and a loss of $39 million due to the decline in fair value of the Hortonworks warrants. (6) Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2016 includes goodwill impairment charge of $395 million and intangible assets impairment charge of $87 million related to Tumblr reporting unit, net restructuring charges of $19 million, advisory fees of $15 million and a gain of $120 million on the sale of land. (7) Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2016 includes advisory fees of $27 million, net restructuring charges of $10 million and a loss of $8 million due to the decline in fair value of the Hortonworks warrants. (8) Net income attributable to Yahoo! Inc. for the quarter ended December 31, 2016 includes security incidents costs of $10 million, advisory fees of $6 million and net restructuring charges of $2 million. (9) Commencing in the second quarter of 2016, TAC payments related to the Microsoft Search Agreement, which previously would have been recorded as a reduction to revenue, began to be recorded as cost of revenue—TAC due to a required change in revenue presentation. See Note 1—“The Company and Summary of Significant Accounting Policies” and Note 19—“Microsoft Search Agreement” in the Notes to the Company’s consolidated financial statements for additional information.

The Company and Summary of Si47

The Company and Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands	Apr. 15, 2015	Feb. 23, 2015	Feb. 22, 2015	Dec. 31, 2015USD ($)Customer	Dec. 31, 2016USD ($)Customer	Dec. 31, 2015USD ($)Customer	Dec. 31, 2014USD ($)Customer	Mar. 31, 2017USD ($)
Company and Summary of Significant Accounting Policies [Line Items]
Number of other customers that accounted for more than 10% of revenue during the period | Customer					0	0	0
Number of customers that accounted for more than 10% of accounts receivable balance | Customer				0	0	0
Foreign currency transaction loss						$ 22,000	$ 15,000
Foreign currency transaction gain					$ 4,000
Capitalized software and labor costs					25,000	31,000	85,000
Amortization of capitalized cost total					85,000	144,000	161,000
Capitalized amount of stock-based compensation					4,000	5,000	12,000
Asset impairment charge				$ 2,000	$ 0	44,381	0
Capital lease period maximum					15 years
Interest related to capital leases					$ 3,000	4,000	5,000
Net lease obligations				$ 33,000	23,000	33,000
Income taxes paid, net of refunds received						$ 3,000,000	90,000
Income taxes refund received					$ 151,000
Percentage of search queries originating from personal computers accessing Yahoo Properties and its Affiliate sites that a payment request can be made					51.00%	51.00%
Volume commitment for traffic generated on mobile devices					0.00%	0.00%
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%
Advertising expense total					$ 135,000	$ 184,000	$ 142,000
Minimum
Company and Summary of Significant Accounting Policies [Line Items]
Amortizable intangible assets, useful life, years					1 year
Vesting period, years					1 year
Minimum | Buildings
Company and Summary of Significant Accounting Policies [Line Items]
Property, plant and equipment useful life, years					20 years
Minimum | Computers and Equipment and Furniture and Fixtures
Company and Summary of Significant Accounting Policies [Line Items]
Property, plant and equipment useful life, years					3 years
Maximum
Company and Summary of Significant Accounting Policies [Line Items]
Amortizable intangible assets, useful life, years					7 years
Vesting period, years					4 years
Maximum | Buildings
Company and Summary of Significant Accounting Policies [Line Items]
Property, plant and equipment useful life, years					25 years
Maximum | Computers and Equipment and Furniture and Fixtures
Company and Summary of Significant Accounting Policies [Line Items]
Property, plant and equipment useful life, years					5 years
Customer Concentration Risk | Sales Revenue, Net | Microsoft Search Agreement | Microsoft
Company and Summary of Significant Accounting Policies [Line Items]
Concentration risk, percentage					37.00%	35.00%	35.00%
Originally Developed Content
Company and Summary of Significant Accounting Policies [Line Items]
Asset impairment charge						$ 16,000
Capitalized Software and Labor | Minimum
Company and Summary of Significant Accounting Policies [Line Items]
Amortizable intangible assets, useful life, years					1 year
Capitalized Software and Labor | Maximum
Company and Summary of Significant Accounting Policies [Line Items]
Amortizable intangible assets, useful life, years					3 years
Acquired Content
Company and Summary of Significant Accounting Policies [Line Items]
Asset impairment charge						$ 28,000
Scenario, Forecast | ASU 2016-09
Company and Summary of Significant Accounting Policies [Line Items]
Cumulative impact expected in retained earnings								$ 100,000

The Company And Summary Of Si48

The Company And Summary Of Significant Accounting Policies, Amounts Paid to Affiliates (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Company and Summary of Significant Accounting Policies [Line Items]
Cost of revenue - TAC		$ 1,650,786	$ 877,514	$ 217,531
Microsoft Search Agreement
Company and Summary of Significant Accounting Policies [Line Items]
Cost of revenue - TAC	[1]	812,105	0	0
Reduction to revenue in transitioned markets		$ 273,705	$ 1,269,134	$ 1,319,242
[1]	For the year ended December 31, 2016, cost of revenue-TAC included $701 million in the Americas segment, $106 million in the EMEA segment, and $5 million in the Asia Pacific segment.

The Company And Summary Of Si49

The Company And Summary Of Significant Accounting Policies, Amounts Paid to Affiliates (Parenthetical) (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Company and Summary of Significant Accounting Policies [Line Items]
Cost of revenue - TAC		$ 1,650,786	$ 877,514	$ 217,531
Americas Segment
Company and Summary of Significant Accounting Policies [Line Items]
Cost of revenue - TAC	[1]	1,463,221	788,725	166,545
Europe Middle East Africa Segment
Company and Summary of Significant Accounting Policies [Line Items]
Cost of revenue - TAC	[1]	144,547	57,284	36,867
Asia Pacific Segment
Company and Summary of Significant Accounting Policies [Line Items]
Cost of revenue - TAC	[1]	43,018	31,505	14,119
Microsoft Search Agreement
Company and Summary of Significant Accounting Policies [Line Items]
Cost of revenue - TAC	[2]	812,105	$ 0	$ 0
Microsoft Search Agreement | Americas Segment
Company and Summary of Significant Accounting Policies [Line Items]
Cost of revenue - TAC		701,000
Microsoft Search Agreement | Europe Middle East Africa Segment
Company and Summary of Significant Accounting Policies [Line Items]
Cost of revenue - TAC		106,000
Microsoft Search Agreement | Asia Pacific Segment
Company and Summary of Significant Accounting Policies [Line Items]
Cost of revenue - TAC		$ 5,000
[1]	Commencing in the second quarter of 2016, TAC payments related to the Microsoft Search Agreement, which previously would have been recorded as a reduction to revenue, began to be recorded as cost of revenue-TAC due to a required change in revenue presentation. See Note 1-"The Company and Summary of Significant Accounting Policies" and Note 19-"Microsoft Search Agreement" for additional information.
[2]	For the year ended December 31, 2016, cost of revenue-TAC included $701 million in the Americas segment, $106 million in the EMEA segment, and $5 million in the Asia Pacific segment.

Marketable Securities, Invest50

Marketable Securities, Investments and Fair Value Disclosures, Available for Sale Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016		Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Cost Basis	$ 9,543,158		$ 7,946,328
Gross Unrealized Gains	30,974,032		28,517,170
Gross Unrealized Losses	(8,615)		(5,644)
Estimated Fair Value	40,508,575		36,457,854
Government and agency securities
Schedule of Available-for-sale Securities [Line Items]
Cost Basis	650,344		616,501
Gross Unrealized Gains	43		24
Gross Unrealized Losses	(903)		(635)
Estimated Fair Value	649,484		615,890
Corporate Debt Securities, Commercial Paper, Time Deposits, And Bank Certificates Of Deposit
Schedule of Available-for-sale Securities [Line Items]
Cost Basis	6,144,991		4,589,799
Gross Unrealized Gains	812		292
Gross Unrealized Losses	(4,655)		(4,908)
Estimated Fair Value	6,141,148		4,585,183
Corporate Equity Securities | Alibaba Group
Schedule of Available-for-sale Securities [Line Items]
Cost Basis	2,713,484		2,713,484
Gross Unrealized Gains	30,967,395		28,458,877
Gross Unrealized Losses	0		0
Estimated Fair Value	33,680,879		31,172,361
Corporate Equity Securities | Hortonworks, Inc
Schedule of Available-for-sale Securities [Line Items]
Cost Basis	26,246		26,246
Gross Unrealized Gains	5,713		57,977
Gross Unrealized Losses	0		0
Estimated Fair Value	31,959		84,223
Corporate Equity Securities | Other corporate equity securities
Schedule of Available-for-sale Securities [Line Items]
Cost Basis	8,093		298
Gross Unrealized Gains	69		0
Gross Unrealized Losses	(3,057)	[1]	(101)
Estimated Fair Value	$ 5,105		$ 197
[1]	Relates to the other corporate equity securities in an unrealized loss position for less than 12 months.

Marketable Securities, Invest51

Marketable Securities, Investments and Fair Value Disclosures, Available for Sale Marketable Securities by Balance Sheet Location (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Short-term marketable securities	$ 5,700,925	$ 4,225,112
Long-term marketable securities	1,089,707	975,961
Investment in Alibaba Group	33,680,879	31,172,361
Other long-term assets and investments	37,064	84,420
Total	$ 40,508,575	$ 36,457,854

Marketable Securities, Invest52

Marketable Securities, Investments and Fair Value Disclosures - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended					12 Months Ended
		Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Investments [Line Items]
Cash and cash equivalents							$ 1,119,469	$ 1,631,911	$ 2,664,098	$ 2,077,590
Cash deposited with commercial banks
Investments [Line Items]
Cash and cash equivalents							705,000	965,000
Cash and Cash Equivalents
Investments [Line Items]
Short-term, highly-liquid investments							415,000	667,000
Other long-term assets and investments
Investments [Line Items]
Cost method investment balance							$ 83,000	83,000
Convertible Senior Notes
Investments [Line Items]
Principal amount										$ 1,437,500
Convertible senior notes percent							0.00%			0.00%
Maturity date, convertible senior note							Dec. 1, 2018
Fair Value Measurements At Reporting Date Using Level 2 | Convertible Senior Notes
Investments [Line Items]
Fair value of the convertible senior notes							$ 1,314,876	1,250,124
Hortonworks, Inc
Investments [Line Items]
Percentage of ownership interest, before current transaction									16.00%
Cost method investment balance									$ 26,000
Number of unregistered shares owned							3,800
Unregistered shares lock-up agreement period							6 months
Purchase entitlement of common stock upon exercise of warrants							3,700
Gain recorded following the initial public offering									57,000
Gain (loss) in fair value of warrants		$ (8,000)	$ (39,000)	$ (13,000)	$ 5,000	$ (12,000)
Hortonworks, Inc | Other income (expense), net
Investments [Line Items]
Gain (loss) in fair value of warrants							$ (50,000)	(19,000)	$ 41,000
Hortonworks, Inc | Fair Value Measurements At Reporting Date Using Level 1
Investments [Line Items]
Warrants							0	0
Hortonworks, Inc | Fair Value Measurements At Reporting Date Using Level 2
Investments [Line Items]
Warrants							0	0
Hortonworks, Inc | Corporate Equity Securities
Investments [Line Items]
Warrants							28,815	78,861
Hortonworks, Inc | Corporate Equity Securities | Fair Value Measurements At Reporting Date Using Level 1
Investments [Line Items]
Available-for-sale securities	[1]						31,959	84,223
Hortonworks, Inc | Corporate Equity Securities | Fair Value Measurements At Reporting Date Using Level 2
Investments [Line Items]
Available-for-sale securities	[1]						$ 0	$ 0
Hortonworks, Inc | Preferred warrants
Investments [Line Items]
Purchase entitlement of common stock upon exercise of warrants							3,250
Warrants held							6,500
Exercise price per share							$ 0.01
Hortonworks, Inc | Common warrants
Investments [Line Items]
Purchase entitlement of common stock upon exercise of warrants							500
Warrants held							500
Exercise price per share							$ 8.46
[1]	The Hortonworks equity securities and other corporate equity securities are classified as part of other long-term assets and investments on the consolidated balance sheets.

Marketable Securities, Invest53

Marketable Securities, Investments and Fair Value Disclosures, Available for Sale Securities by Contractual Maturities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Due within one year	$ 5,700,925	$ 4,225,112
Due after one year through three years	1,089,707	975,961
Total available-for-sale marketable debt securities	$ 6,790,632	$ 5,201,073

Marketable Securities, Invest54

Marketable Securities, Investments and Fair Value Disclosures, Available for Sale Marketable Debt Securities in Unrealized Loss Position (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	$ 2,899,540	$ 2,967,388
Less than 12 Months, Unrealized Loss	(5,541)	(5,398)
12 Months or Longer, Fair Value	46,438	99,214
12 Months or Longer, Unrealized Loss	(17)	(145)
Total, Fair Value	2,945,978	3,066,602
Total, Unrealized Loss	(5,558)	(5,543)
Government and agency securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	543,605	552,041
Less than 12 Months, Unrealized Loss	(903)	(635)
12 Months or Longer, Fair Value	0	0
12 Months or Longer, Unrealized Loss	0	0
Total, Fair Value	543,605	552,041
Total, Unrealized Loss	(903)	(635)
Corporate debt securities, commercial paper, and bank certificates of deposit
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	2,355,935	2,415,347
Less than 12 Months, Unrealized Loss	(4,638)	(4,763)
12 Months or Longer, Fair Value	46,438	99,214
12 Months or Longer, Unrealized Loss	(17)	(145)
Total, Fair Value	2,402,373	2,514,561
Total, Unrealized Loss	$ (4,655)	$ (4,908)

Marketable Securities, Invest55

Marketable Securities, Investments and Fair Value Disclosures, Fair Value of Financial Assets and Liabilities (Detail) - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
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		$ 40,963,958	$ 37,288,363
Total financial assets and liabilities at fair value		40,954,625	37,282,702
Fair Value Measurements At Reporting Date Using Total | Hortonworks, Inc
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants		28,815	78,861
Money Market Funds | Fair Value Measurements At Reporting Date Using Total
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	[1]	375,286	386,792
Government and agency securities | Fair Value Measurements At Reporting Date Using Total
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[1]	649,484	635,917
Commercial Paper And Bank Certificates Of Deposit | Fair Value Measurements At Reporting Date Using Total
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[1]	3,008,971	1,844,494
Corporate Debt Securities | Fair Value Measurements At Reporting Date Using Total
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[1]	3,132,177	2,918,496
Time Deposits | Fair Value Measurements At Reporting Date Using Total
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[1]	39,598	82,703
Corporate Equity Securities | Hortonworks, Inc
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants		28,815	78,861
Corporate Equity Securities | Fair Value Measurements At Reporting Date Using Total | Other corporate equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[2]	5,105	197
Corporate Equity Securities | Fair Value Measurements At Reporting Date Using Total | Alibaba Group
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		33,680,879	31,172,361
Corporate Equity Securities | Fair Value Measurements At Reporting Date Using Total | Hortonworks, Inc
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[2]	31,959	84,223
Foreign Currency Derivative Contracts | Fair Value Measurements At Reporting Date Using Total
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency derivative contracts, assets	[3]	11,684	84,319
Foreign currency derivative contracts, liabilities	[3]	(9,333)	(5,661)
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		34,093,229	31,643,573
Total financial assets and liabilities at fair value		34,093,229	31,643,573
Fair Value Measurements At Reporting Date Using Level 1 | Hortonworks, Inc
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants		0	0
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	[1]	375,286	386,792
Fair Value Measurements At Reporting Date Using Level 1 | Government and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[1]	0	0
Fair Value Measurements At Reporting Date Using Level 1 | 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]	0	0
Fair Value Measurements At Reporting Date Using Level 1 | Corporate Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[1]	0	0
Fair Value Measurements At Reporting Date Using Level 1 | Time Deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[1]	0	0
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	[2]	5,105	197
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		33,680,879	31,172,361
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	[2]	31,959	84,223
Fair Value Measurements At Reporting Date Using Level 1 | Foreign Currency Derivative Contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency derivative contracts, assets	[3]	0	0
Foreign currency derivative contracts, liabilities	[3]	0	0
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		6,841,914	5,565,929
Total financial assets and liabilities at fair value		6,832,581	5,560,268
Fair Value Measurements At Reporting Date Using Level 2 | Hortonworks, Inc
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants		0	0
Fair Value Measurements At Reporting Date Using Level 2 | Money Market Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	[1]	0	0
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	[1]	649,484	635,917
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]	3,008,971	1,844,494
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	[1]	3,132,177	2,918,496
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	[1]	39,598	82,703
Fair Value Measurements At Reporting Date Using Level 2 | Corporate Equity Securities | Other corporate equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[2]	0	0
Fair Value Measurements At Reporting Date Using Level 2 | Corporate Equity Securities | Alibaba Group
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0	0
Fair Value Measurements At Reporting Date Using Level 2 | Corporate Equity Securities | Hortonworks, Inc
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[2]	0	0
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	[3]	11,684	84,319
Foreign currency derivative contracts, liabilities	[3]	(9,333)	(5,661)
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		28,815	78,861
Total financial assets and liabilities at fair value		28,815	78,861
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		28,815	78,861
Fair Value Measurements At Reporting Date Using Level 3 | Money Market Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	[1]	0	0
Fair Value Measurements At Reporting Date Using Level 3 | Government and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[1]	0	0
Fair Value Measurements At Reporting Date Using Level 3 | 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]	0	0
Fair Value Measurements At Reporting Date Using Level 3 | Corporate Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[1]	0	0
Fair Value Measurements At Reporting Date Using Level 3 | Time Deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[1]	0	0
Fair Value Measurements At Reporting Date Using Level 3 | Corporate Equity Securities | Other corporate equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[2]	0	0
Fair Value Measurements At Reporting Date Using Level 3 | Corporate Equity Securities | Alibaba Group
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0	0
Fair Value Measurements At Reporting Date Using Level 3 | Corporate Equity Securities | Hortonworks, Inc
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[2]	0	0
Fair Value Measurements At Reporting Date Using Level 3 | Foreign Currency Derivative Contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency derivative contracts, assets	[3]	0	0
Foreign currency derivative contracts, liabilities	[3]	$ 0	$ 0
[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 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 consolidated balance sheets.
[3]	Foreign currency derivative contracts are classified as part of either current or noncurrent assets or liabilities on the consolidated balance sheets. The notional amounts of the foreign currency derivative contracts were: $1.5 billion, including contracts designated as net investment hedges of $1.2 billion, as of December 31, 2015; and $0.6 billion, including contracts designated as net investment hedges of $0.2 billion, as of December 31, 2016.

Marketable Securities, Invest56

Marketable Securities, Investments and Fair Value Disclosures, Fair Value of Financial Assets and Liabilities (Parenthetical) (Detail) - Foreign Currency Derivative Contracts - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative notional amount	$ 600	$ 1,500
Designated as Hedging Instrument | Net Investment Hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative notional amount	$ 200	$ 1,150	$ 1,647

Marketable Securities, Invest57

Marketable Securities, Investments and Fair Value Disclosures, Assumptions Used to Calculate Value of Warrants (Detail) - Hortonworks, Inc	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Preferred warrants
Investments [Line Items]
Expected dividend yield	0.00%	0.00%
Risk-free interest rate	1.70%	1.78%
Expected volatility	44.00%	46.00%
Expected life (in years)	3 years 6 months	4 years 6 months
Common warrants
Investments [Line Items]
Expected dividend yield	0.00%	0.00%
Risk-free interest rate	2.25%	2.25%
Expected volatility	44.00%	46.00%
Expected life (in years)	6 years 5 months 9 days	7 years 5 months 9 days

Consolidated Financial Statem58

Consolidated Financial Statement Details, Prepaid Expenses and Other Current Assets (Detail) - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
Prepaid And Other Current Assets [Line Items]
Prepaid expenses		$ 73,671	$ 87,843
Foreign currency forward and option contract assets		11,684	84,136
Other receivables non-trade		33,519	167,198
Restricted cash	[1]	55,168	29,678
Income tax receivables		35,059	220,996
Other		12,398	12,941
Total prepaid expenses and other current assets		$ 221,499	$ 602,792
[1]	The majority of the balance as of December 31, 2015 and 2016 represents customer funds received by the Company in connection with its online e-commerce services in the Asia Pacific region that are restricted in a separate bank account. In addition, the balance as of December 31, 2016 also included customer funds received by the Company in connection with its fantasy sports that are restricted in separate bank accounts.

Consolidated Financial Statem59

Consolidated Financial Statement Details, Property and Equipment Net (Detail) - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property Plant and Equipment Gross		$ 3,946,725	$ 4,265,561
Less: accumulated depreciation and amortization	[1]	(2,736,788)	(2,718,238)
Total property and equipment, net		1,209,937	1,547,323
Land
Property, Plant and Equipment [Line Items]
Property Plant and Equipment Gross	[2]	89,960	215,740
Buildings
Property, Plant and Equipment [Line Items]
Property Plant and Equipment Gross	[1],[2]	935,515	840,083
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property Plant and Equipment Gross	[1]	249,698	252,985
Computers and Equipment
Property, Plant and Equipment [Line Items]
Property Plant and Equipment Gross	[1]	1,901,619	2,143,413
Capitalized Software and Labor
Property, Plant and Equipment [Line Items]
Property Plant and Equipment Gross		679,902	643,758
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Property Plant and Equipment Gross	[2]	74,526	86,418
Assets not yet in use
Property, Plant and Equipment [Line Items]
Property Plant and Equipment Gross		$ 15,505	$ 83,164
[1]	The Company recorded assets under capital leases, primarily for computers and equipment and leasehold improvements, which had gross carrying values of $82 million and $57 million as of December 31, 2015 and 2016, respectively. Accumulated amortization related to these capital leases totaled $75 million and $52 million as of December 31, 2015 and 2016, respectively.
[2]	During 2016, the Company completed the sale of certain property located in Santa Clara, California. The total carrying value of the property assets was $126 million, which mostly pertained to the land.

Consolidated Financial Statem60

Consolidated Financial Statement Details, Property and Equipment Net (Parenthetical) (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Jun. 16, 2016	Dec. 31, 2015
Computers and Equipment
Property, Plant and Equipment [Line Items]
Capital lease assets, gross	$ 57		$ 82
Capital leased assets, accumulated depreciation	$ 52		$ 75
California | Americas Segment
Property, Plant and Equipment [Line Items]
Carrying value of property		$ 126

Consolidated Financial Statem61

Consolidated Financial Statement Details, Other Long-Term Assets and Investments (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Schedule of Other Long Term Assets [Line Items]
Deferred income taxes	$ 18,228	$ 21,745
Foreign currency forward and option contracts	0	183
Other	44,277	74,768
Total other long-term assets and investments	206,059	342,390
Investments in privately-held companies
Schedule of Other Long Term Assets [Line Items]
Investments	82,780	82,610
Hortonworks, Inc | Equity Securities and Warrants
Schedule of Other Long Term Assets [Line Items]
Investments	$ 60,774	$ 163,084

Consolidated Financial Statem62

Consolidated Financial Statement Details, Other Accrued Expenses and Current Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accrued Expenses and Other Current Liabilities [Line Items]
Accrued content, connection, traffic acquisition, and other costs	$ 400,172	$ 252,612
Accrued compensation and related expenses	342,354	310,111
Income taxes payable	6,039	4,181
Accrued professional service expenses	30,827	40,914
Accrued sales and marketing related expenses	13,936	40,876
Accrued restructuring costs	27,041	40,283
Current liability for uncertain tax contingencies	2,409	12,586
Other	183,898	233,095
Total other accrued expenses and current liabilities	$ 1,006,676	$ 934,658

Consolidated Financial Statem63

Consolidated Financial Statement Details, Deferred and Other Long-Term Tax Liabilities (Detail) - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
Deferred and Other Long Term Liabilities Net [Line Items]
Deferred and other income tax liabilities	[1]	$ 13,096,849	$ 12,312,013
Long-term liability for uncertain tax contingencies	[2]	1,179,605	1,155,178
Total deferred and other long-term tax contingencies		14,276,454	13,467,191
Deferred tax liabilities related to investment in Alibaba Group	[1]	13,633,988	12,611,867
Deferred and other long-term tax liabilities		$ 642,466	$ 855,324
[1]	Deferred and other income tax liabilities are presented on a net basis by jurisdiction. The balances as of December 31, 2015 and 2016 include the deferred tax liabilities related to investment in Alibaba Group.
[2]	Includes interest and penalties.

Consolidated Financial Statem64

Consolidated Financial Statement Details, Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income [Line Items]
Unrealized gains on available-for-sale securities, net of tax	$ 18,376,965	$ 16,918,539
Unrealized gains (losses) on cash flow hedges, net of tax	(19)	482
Foreign currency translation adjustments, net of tax	100,947	(342,990)
Accumulated other comprehensive income	$ 18,477,893	$ 16,576,031

Consolidated Financial Statem65

Consolidated Financial Statement Details, Noncontrolling Interests (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Noncontrolling Interests [Line Items]
Beginning noncontrolling interests	$ 35,883	$ 43,755
Distributions to noncontrolling interests	(5,948)	(15,847)
Net income attributable to noncontrolling interests	4,858	7,975	$ 10,411
Ending noncontrolling interests	$ 34,793	$ 35,883	$ 43,755

Consolidated Financial Statem66

Consolidated Financial Statement Details, Other Income (Expense), Net (Detail) - USD ($) $ in Thousands

3 Months Ended

12 Months Ended

Dec. 31, 2016

[1]

Sep. 30, 2016

[2]

Jun. 30, 2016

[3]

Mar. 31, 2016

[4]

Dec. 31, 2015

[5]

Sep. 30, 2015

[6]

Jun. 30, 2015

[7]

Mar. 31, 2015

[8]

Dec. 31, 2016

Dec. 31, 2015

Dec. 31, 2014

Components of Other Income (Expense) [Line Items]

Interest and investment income

$ 60,931

$ 34,383

$ 26,309

Interest expense

(73,783)

(71,865)

(68,851)

Gain on sale of Alibaba Group ADSs

0

0

10,319,437

Gain (loss) on Hortonworks warrants

(50,046)

(19,199)

98,062

Foreign exchange (loss) gain

4,282

(22,226)

(14,687)

Other

4,700

3,125

9,169

Total other income (expense), net

$ (15,440)

$ (6,122)

$ 15,062

$ (47,416)

$ (9,023)

$ (23,955)

$ (11,741)

$ (31,063)

$ (53,916)

$ (75,782)

$ 10,369,439

[1]

Net income attributable to Yahoo! Inc. for the quarter ended December 31, 2016 includes security incidents costs of $10 million, advisory fees of $6 million and net restructuring charges of $2 million.

[2]

Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2016 includes advisory fees of $27 million, net restructuring charges of $10 million and a loss of $8 million due to the decline in fair value of the Hortonworks warrants.

[3]

Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2016 includes goodwill impairment charge of $395 million and intangible assets impairment charge of $87 million related to Tumblr reporting unit, net restructuring charges of $19 million, advisory fees of $15 million and a gain of $120 million on the sale of land.

[4]

Net loss attributable to Yahoo! Inc. for the quarter ended March 31, 2016 includes net restructuring charges of $57 million, advisory fees of $9 million and a loss of $39 million due to the decline in fair value of the Hortonworks warrants.

[5]

Net loss attributable to Yahoo! Inc. for the quarter ended December 31, 2015 includes goodwill impairment charge of $4.5 billion, asset impairment charge of $2 million related to the originally developed content, intangible assets impairment charge of $15 million, net restructuring charges of $7 million, and advisory fees of $1 million.

[6]

Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2015 includes, a loss of $13 million due to the decline in fair value of the Hortonworks warrants, asset impairment charge of $42 million related to the acquired and originally developed content, and net restructuring charges of $26 million.

[7]

Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2015 includes a gain on sale of patents of $9 million, a gain of $5 million due to the increase in fair value of the Hortonworks warrants, net restructuring charges of $20 million, and advisory fees of $8 million.

[8]

Net income attributable to Yahoo! Inc. for the quarter ended March 31, 2015 includes a gain on sale of patents of $2 million, a loss of $12 million due to the decline in fair value of the Hortonworks warrants, and net restructuring charges of $51 million.

Consolidated Financial Statem67

Consolidated Financial Statement Details - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions	3 Months Ended					12 Months Ended
	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Hortonworks, Inc
Financial Statement Details [Line Items]
Gain recorded following the initial public offering								$ 57
Gain (loss) in fair value of warrants	$ (8)	$ (39)	$ (13)	$ 5	$ (12)
Other income (expense), net | Hortonworks, Inc
Financial Statement Details [Line Items]
Gain (loss) in fair value of warrants						$ (50)	$ (19)	$ 41
Alibaba Group
Financial Statement Details [Line Items]
Number of ADSs sold at initial public offering								140
Foreign Exchange
Financial Statement Details [Line Items]
Foreign currency transaction, realized net gain due to liquidation of foreign subsidiaries						$ 20

Consolidated Financial Statem68

Consolidated Financial Statement Details, Reclassifications Out of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2016		Sep. 30, 2016		Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenue	$ (1,469,140)	[1],[2]	$ (1,305,206)	[1],[3]	$ (1,307,637)	[1],[4]	$ (1,087,152)	[1],[5]	$ (1,273,393)	[1],[6]	$ (1,225,673)	[1],[7]	$ (1,243,265)	[1],[8]	$ (1,225,970)	[1],[9]	$ (5,169,135)	$ (4,968,301)	$ (4,618,133)
Total reclassifications for the period																	(15,615)	4,595	(57,778)
Restructuring charges, net	2,000		10,000		19,000		57,000		7,000		26,000		20,000		51,000		88,629	104,019	103,450
Other income (expense), net	$ 15,440	[2]	$ 6,122	[3]	$ (15,062)	[4]	$ 47,416	[5]	$ 9,023	[6]	$ 23,955	[7]	$ 11,741	[8]	$ 31,063	[9]	53,916	75,782	(10,369,439)
Realized (gain) losses on cash flow hedges, net of tax | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenue																	4,298	4,421	(5,259)
Realized (gains) losses on available-for-sale securities, net of tax | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense), net																	181	$ 174	(2,218)
Realized (gains) losses on foreign currency translation adjustments | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Restructuring charges, net																	1,110
Other income (expense), net																	$ (21,204)		$ (50,301)
[1]	Commencing in the second quarter of 2016, TAC payments related to the Microsoft Search Agreement, which previously would have been recorded as a reduction to revenue, began to be recorded as cost of revenue-TAC due to a required change in revenue presentation. See Note 1-"The Company and Summary of Significant Accounting Policies" and Note 19-"Microsoft Search Agreement" in the Notes to the Company's consolidated financial statements for additional information.
[2]	Net income attributable to Yahoo! Inc. for the quarter ended December 31, 2016 includes security incidents costs of $10 million, advisory fees of $6 million and net restructuring charges of $2 million.
[3]	Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2016 includes advisory fees of $27 million, net restructuring charges of $10 million and a loss of $8 million due to the decline in fair value of the Hortonworks warrants.
[4]	Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2016 includes goodwill impairment charge of $395 million and intangible assets impairment charge of $87 million related to Tumblr reporting unit, net restructuring charges of $19 million, advisory fees of $15 million and a gain of $120 million on the sale of land.
[5]	Net loss attributable to Yahoo! Inc. for the quarter ended March 31, 2016 includes net restructuring charges of $57 million, advisory fees of $9 million and a loss of $39 million due to the decline in fair value of the Hortonworks warrants.
[6]	Net loss attributable to Yahoo! Inc. for the quarter ended December 31, 2015 includes goodwill impairment charge of $4.5 billion, asset impairment charge of $2 million related to the originally developed content, intangible assets impairment charge of $15 million, net restructuring charges of $7 million, and advisory fees of $1 million.
[7]	Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2015 includes, a loss of $13 million due to the decline in fair value of the Hortonworks warrants, asset impairment charge of $42 million related to the acquired and originally developed content, and net restructuring charges of $26 million.
[8]	Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2015 includes a gain on sale of patents of $9 million, a gain of $5 million due to the increase in fair value of the Hortonworks warrants, net restructuring charges of $20 million, and advisory fees of $8 million.
[9]	Net income attributable to Yahoo! Inc. for the quarter ended March 31, 2015 includes a gain on sale of patents of $2 million, a loss of $12 million due to the decline in fair value of the Hortonworks warrants, and net restructuring charges of $51 million.

Consolidated Financial Statem69

Consolidated Financial Statement Details, Reclassifications Out of Accumulated Other Comprehensive Income (Parenthetical) (Detail) - USD ($) $ in Thousands

3 Months Ended

12 Months Ended

Dec. 31, 2016

[1]

Sep. 30, 2016

[2]

Jun. 30, 2016

[3]

Mar. 31, 2016

[4]

Dec. 31, 2015

[5]

Sep. 30, 2015

[6]

Jun. 30, 2015

[7]

Mar. 31, 2015

[8]

Dec. 31, 2016

Dec. 31, 2015

Dec. 31, 2014

Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]

(Provision) benefit for income taxes

$ (1,492)

$ (105,513)

$ 15,543

$ (34,766)

$ (13,985)

$ (93,208)

$ 58,495

$ (40,900)

$ (126,228)

$ (89,598)

$ 4,038,102

Reclassification out of Accumulated Other Comprehensive Income | Realized (gains) losses on foreign currency translation adjustments

Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]

(Provision) benefit for income taxes

$ 30,000

[1]

Net income attributable to Yahoo! Inc. for the quarter ended December 31, 2016 includes security incidents costs of $10 million, advisory fees of $6 million and net restructuring charges of $2 million.

[2]

Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2016 includes advisory fees of $27 million, net restructuring charges of $10 million and a loss of $8 million due to the decline in fair value of the Hortonworks warrants.

[3]

Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2016 includes goodwill impairment charge of $395 million and intangible assets impairment charge of $87 million related to Tumblr reporting unit, net restructuring charges of $19 million, advisory fees of $15 million and a gain of $120 million on the sale of land.

[4]

Net loss attributable to Yahoo! Inc. for the quarter ended March 31, 2016 includes net restructuring charges of $57 million, advisory fees of $9 million and a loss of $39 million due to the decline in fair value of the Hortonworks warrants.

[5]

Net loss attributable to Yahoo! Inc. for the quarter ended December 31, 2015 includes goodwill impairment charge of $4.5 billion, asset impairment charge of $2 million related to the originally developed content, intangible assets impairment charge of $15 million, net restructuring charges of $7 million, and advisory fees of $1 million.

[6]

Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2015 includes, a loss of $13 million due to the decline in fair value of the Hortonworks warrants, asset impairment charge of $42 million related to the acquired and originally developed content, and net restructuring charges of $26 million.

[7]

Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2015 includes a gain on sale of patents of $9 million, a gain of $5 million due to the increase in fair value of the Hortonworks warrants, net restructuring charges of $20 million, and advisory fees of $8 million.

[8]

Net income attributable to Yahoo! Inc. for the quarter ended March 31, 2015 includes a gain on sale of patents of $2 million, a loss of $12 million due to the decline in fair value of the Hortonworks warrants, and net restructuring charges of $51 million.

Acquisitions and Dispositions,

Acquisitions and Dispositions, Summary of Significant Acquisitions (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	Sep. 02, 2015	Dec. 12, 2014	Aug. 25, 2014
Business Acquisition [Line Items]
Goodwill	$ 808,114	$ 5,152,570	$ 415,809
Flurry, Inc.
Business Acquisition [Line Items]
Purchase Price		270,000
Goodwill		194,000				$ 194,081
Amortizable Intangibles		55,000
BrightRoll, Inc.
Business Acquisition [Line Items]
Purchase Price		581,000
Goodwill		417,000			$ 416,580
Amortizable Intangibles		113,000
Other Acquisitions
Business Acquisition [Line Items]
Purchase Price	23,000	66,000
Goodwill	22,000	39,000
Amortizable Intangibles	5,000	$ 18,000
Polyvore, Inc.
Business Acquisition [Line Items]
Purchase Price	161,000
Goodwill	131,000			$ 131,084
Amortizable Intangibles	$ 19,000

Acquisitions and Dispositions -

Acquisitions and Dispositions - Additional Information (Detail) $ in Thousands

Feb. 20, 2017USD ($)

Jun. 16, 2016USD ($)

Sep. 02, 2015USD ($)

Dec. 12, 2014USD ($)

Aug. 25, 2014USD ($)

Jun. 30, 2016USD ($)

Jun. 30, 2015USD ($)

Mar. 31, 2015USD ($)

Dec. 31, 2016USD ($)Entity

Dec. 31, 2015USD ($)Entity

Dec. 31, 2014USD ($)Entity

Jul. 23, 2016USD ($)

Business Acquisition [Line Items]

Stock-based compensation expense

$ 491,902

$ 457,153

$ 420,174

Goodwill

415,809

808,114

5,152,570

Business combination, cash consideration paid net of cash acquired

0

175,693

859,036

Total cash consideration

460,000

Gain on sale of patents

$ 9,000

$ 2,000

Proceeds from the sale of patents

1,500

29,100

86,300

Proceeds from sale of property and equipment

249,787

11,176

17,404

Gain on sales of patents and land

$ 120,000

121,559

11,100

97,894

Americas Segment

Business Acquisition [Line Items]

Goodwill

[1]

123,985

518,886

4,322,219

Americas Segment | California

Business Acquisition [Line Items]

Carrying value of property

$ 126,000

Proceeds from sale of property and equipment

246,000

246,000

Closing costs

$ 4,000

Gain on sales of patents and land

120,000

Sold Patents

Business Acquisition [Line Items]

Total cash consideration

61,000

Gain on sale of patents

2,000

11,000

61,000

Existing Patents

Business Acquisition [Line Items]

Total cash consideration

$ 135,000

Future revenue recognition period

4 years

Capture Period Patents

Business Acquisition [Line Items]

Total cash consideration

$ 264,000

Future revenue recognition period

5 years

Existing Patents and Capture Period Patents

Business Acquisition [Line Items]

Revenue related to patents

$ 86,000

86,000

$ 43,000

Patents | Alibaba Group

Business Acquisition [Line Items]

Proceeds from the sale of patents

23,500

Patents | Equity Investment in Yahoo Japan

Business Acquisition [Line Items]

Gain on sale of patents

12,000

Proceeds from the sale of patents

18,000

Maximum

Business Acquisition [Line Items]

Equity award vesting period

4 years

Amortizable intangible assets, useful life

7 years

Flurry, Inc.

Business Acquisition [Line Items]

Business combination, total purchase price

$ 269,670

Weighted average useful life of amortizable intangible assets

5 years

Goodwill

$ 194,081

194,000

Business combination, amortizable intangible assets

55,000

Business combination, other tangible assets

51,235

Business combination, cash acquired

12,139

Business combination, assumed liabilities

$ 43,205

Business combination, total purchase price

270,000

Flurry, Inc. | Maximum

Business Acquisition [Line Items]

Amortizable intangible assets, useful life

5 years

Flurry, Inc. | Stock Options

Business Acquisition [Line Items]

Stock-based compensation expense

$ 4,000

Equity award vesting period

4 years

Flurry, Inc. | Restricted Stock Units (RSUs)

Business Acquisition [Line Items]

Stock-based compensation expense

$ 23,000

Equity award vesting period

4 years

BrightRoll, Inc.

Business Acquisition [Line Items]

Business combination, total purchase price

$ 581,165

Weighted average useful life of amortizable intangible assets

5 years

Goodwill

$ 416,580

417,000

Business combination, amortizable intangible assets

113,000

Business combination, other tangible assets

55,923

Business combination, cash acquired

41,899

Business combination, assumed liabilities

$ 145,667

Business combination, total purchase price

581,000

BrightRoll, Inc. | Maximum

Business Acquisition [Line Items]

Amortizable intangible assets, useful life

7 years

BrightRoll, Inc. | Stock Options

Business Acquisition [Line Items]

Stock-based compensation expense

$ 25,000

Equity award vesting period

4 years

BrightRoll, Inc. | Restricted Stock Units (RSUs)

Business Acquisition [Line Items]

Stock-based compensation expense

$ 78,000

Equity award vesting period

4 years

Contingent cash compensation to be paid to founder

$ 54,000

Contingent cash consideration, payment period

3 years

Polyvore, Inc.

Business Acquisition [Line Items]

Business combination, total purchase price

$ 160,582

Stock-based compensation expense

$ 15,000

Equity award vesting period

4 years

Weighted average useful life of amortizable intangible assets

3 years

Goodwill

$ 131,084

131,000

Business combination, amortizable intangible assets

19,000

Business combination, other tangible assets

12,057

Business combination, cash acquired

6,019

Business combination, assumed liabilities

7,503

Stock based compensation contingently issuable

$ 15,000

Business combination, total purchase price

161,000

Polyvore, Inc. | Maximum

Business Acquisition [Line Items]

Amortizable intangible assets, useful life

5 years

Polyvore, Inc. | Stock Options

Business Acquisition [Line Items]

Stock-based compensation expense

$ 7,000

Equity award vesting period

4 years

Other Acquisitions

Business Acquisition [Line Items]

Business combination, total purchase price

66,000

Goodwill

$ 22,000

$ 39,000

Business combination, number of entities acquired | Entity

0

1

9

Business combination, cash acquired

$ 4,000

Business combination, cash consideration paid net of cash acquired

62,000

Business combination, amortizable intangible assets

$ 5,000

18,000

Business combination, other tangible assets

10,000

Business combination, cash acquired

4,000

Business combination, assumed liabilities

4,000

5,000

Business combination, total purchase price

$ 23,000

$ 66,000

Original Stock Purchase Agreement

Business Acquisition [Line Items]

Consideration to be received form sale of subsidiary

$ 4,825,800

Subsequent Event | SPA Amendment

Business Acquisition [Line Items]

Consideration to be received form sale of subsidiary

$ 4,475,800

Reduction in consideration to be received form sale of subsidiary

$ 350,000

Subsequent Event | RA Amendment

Business Acquisition [Line Items]

Post-closing liabilities arising from data breach percent retained

50.00%

[1]

Gross goodwill balances for the Americas segment were $4.3 billion as of January 1, 2015 and $4.4 billion as of December 31, 2016. The Americas segment includes accumulated impairment losses of $4.3 billion as of December 31, 2016.

Acquisitions and Dispositions72

Acquisitions and Dispositions, Allocation of Purchase Price of Assets Acquired and Liabilities Assumed, Flurry (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Aug. 25, 2014
Business Acquisition [Line Items]
Goodwill	$ 415,809	$ 808,114	$ 5,152,570
Flurry, Inc.
Business Acquisition [Line Items]
Cash acquired				$ 12,139
Other tangible assets acquired				51,235
Amortizable intangible assets			55,000
Goodwill			$ 194,000	194,081
Total assets acquired				312,875
Liabilities assumed				(43,205)
Total				269,670
Flurry, Inc. | Developed Technology
Business Acquisition [Line Items]
Amortizable intangible assets				7,100
Flurry, Inc. | Customer Contracts and Related Relationships
Business Acquisition [Line Items]
Amortizable intangible assets				47,600
Flurry, Inc. | Other
Business Acquisition [Line Items]
Amortizable intangible assets				$ 720

Acquisitions and Dispositions73

Acquisitions and Dispositions, Allocation of Purchase Price of Assets Acquired and Liabilities Assumed, BrightRoll (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 12, 2014
Business Acquisition [Line Items]
Goodwill	$ 415,809	$ 808,114	$ 5,152,570
BrightRoll, Inc.
Business Acquisition [Line Items]
Cash acquired				$ 41,899
Accounts receivable, net				99,330
Other tangible assets acquired				55,923
Amortizable intangible assets			113,000
Goodwill			$ 417,000	416,580
Total assets acquired				726,832
Liabilities assumed				(145,667)
Total				581,165
Developed Technology | BrightRoll, Inc.
Business Acquisition [Line Items]
Amortizable intangible assets				19,400
Customer Contracts and Related Relationships | BrightRoll, Inc.
Business Acquisition [Line Items]
Amortizable intangible assets				85,600
Other | BrightRoll, Inc.
Business Acquisition [Line Items]
Amortizable intangible assets				$ 8,100

Acquisitions and Dispositions74

Acquisitions and Dispositions, Allocation of Purchase Price of Assets Acquired and Liabilities Assumed, Polyvore (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Sep. 02, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill	$ 415,809	$ 808,114		$ 5,152,570
Polyvore, Inc.
Business Acquisition [Line Items]
Cash acquired			$ 6,019
Other tangible assets acquired			12,057
Amortizable intangible assets		19,000
Goodwill		$ 131,000	131,084
Total assets acquired			168,085
Liabilities assumed			(7,503)
Total			160,582
Polyvore, Inc. | Developed Technology
Business Acquisition [Line Items]
Amortizable intangible assets			17,550
Polyvore, Inc. | Tradename
Business Acquisition [Line Items]
Amortizable intangible assets			1,150
Polyvore, Inc. | Customer Contracts and Related Relationships
Business Acquisition [Line Items]
Amortizable intangible assets			$ 225

Goodwill (Detail)

Goodwill (Detail) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
		Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Line Items]
Beginning balance			$ 808,114	$ 5,152,570
Acquisitions and related adjustments				152,056
Goodwill impairment charge		$ (4,460,837)	(394,901)	(4,460,837)	$ (88,414)
Foreign currency translation adjustments			2,596	(35,675)
Ending balance		808,114	415,809	808,114	5,152,570
Americas Segment
Goodwill [Line Items]
Beginning balance	[1]		518,886	4,322,219
Acquisitions and related adjustments	[1]			130,450
Goodwill impairment charge	[1]		(394,901)	(3,929,576)
Foreign currency translation adjustments	[1]		0	(4,207)
Ending balance	[1]	518,886	123,985	518,886	4,322,219
Europe Middle East Africa Segment
Goodwill [Line Items]
Beginning balance	[2]		0	532,469
Acquisitions and related adjustments	[2]			21,606
Goodwill impairment charge	[2]		0	(531,261)
Foreign currency translation adjustments	[2]		0	(22,814)
Ending balance	[2]	0	0	0	532,469
Asia Pacific Segment
Goodwill [Line Items]
Beginning balance	[3]		289,228	297,882
Acquisitions and related adjustments	[3]			0
Goodwill impairment charge	[3]		0	0
Foreign currency translation adjustments	[3]		2,596	(8,654)
Ending balance	[3]	$ 289,228	$ 291,824	$ 289,228	$ 297,882
[1]	Gross goodwill balances for the Americas segment were $4.3 billion as of January 1, 2015 and $4.4 billion as of December 31, 2016. The Americas segment includes accumulated impairment losses of $4.3 billion as of December 31, 2016.
[2]	Gross goodwill balances for the EMEA segment were $1.2 billion as of January 1, 2015 and December 31, 2016. The EMEA segment includes accumulated impairment losses of $630 million as of January 1, 2015, and $1.2 billion as of December 31, 2016.
[3]	Gross goodwill balances for the Asia Pacific segment were $457 million as of January 1, 2015 and $451 million as of December 31, 2016. The Asia Pacific segment includes accumulated impairment losses of $159 million as of January 1, 2015 and December 31, 2016.

Goodwill (Parenthetical) (Detai

Goodwill (Parenthetical) (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Jan. 01, 2015
Americas Segment
Goodwill [Line Items]
Gross Goodwill Balance	$ 4,400	$ 4,300
Accumulated impairment losses	4,300
Europe Middle East Africa Segment
Goodwill [Line Items]
Gross Goodwill Balance	1,200	1,200
Accumulated impairment losses	1,200	630
Asia Pacific Segment
Goodwill [Line Items]
Gross Goodwill Balance	451	457
Accumulated impairment losses	$ 159	$ 159

Goodwill - Additional Informati

Goodwill - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended			12 Months Ended
		Jun. 30, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Line Items]
Goodwill impairment charge			$ 4,460,837		$ 394,901	$ 4,460,837	$ 88,414
Goodwill			808,114	$ 5,152,570	415,809	808,114	5,152,570
U.S. & Canada
Goodwill [Line Items]
Goodwill impairment charge						3,692,000
Europe
Goodwill [Line Items]
Goodwill impairment charge						531,000
Latin America
Goodwill [Line Items]
Goodwill impairment charge						8,000
Americas Segment
Goodwill [Line Items]
Goodwill impairment charge	[1]				394,901	3,929,576
Goodwill	[1]		518,886	4,322,219	123,985	518,886	4,322,219
Europe Middle East Africa Segment
Goodwill [Line Items]
Goodwill impairment charge	[2]				0	531,261
Goodwill	[2]		0	532,469	0	0	532,469
Europe Middle East Africa Segment | Middle East
Goodwill [Line Items]
Goodwill impairment charge				79,000
Asia Pacific Segment
Goodwill [Line Items]
Goodwill impairment charge	[3]				0	0
Goodwill	[3]		$ 289,228	297,882	291,824	289,228	$ 297,882
Asia Pacific Segment | India and Southeast Asia
Goodwill [Line Items]
Goodwill impairment charge				$ 9,000
Tumblr
Goodwill [Line Items]
Goodwill impairment charge		$ 395,000				$ 230,000
Tumblr | Americas Segment
Goodwill [Line Items]
Goodwill					$ 124,000
[1]	Gross goodwill balances for the Americas segment were $4.3 billion as of January 1, 2015 and $4.4 billion as of December 31, 2016. The Americas segment includes accumulated impairment losses of $4.3 billion as of December 31, 2016.
[2]	Gross goodwill balances for the EMEA segment were $1.2 billion as of January 1, 2015 and December 31, 2016. The EMEA segment includes accumulated impairment losses of $630 million as of January 1, 2015, and $1.2 billion as of December 31, 2016.
[3]	Gross goodwill balances for the Asia Pacific segment were $457 million as of January 1, 2015 and $451 million as of December 31, 2016. The Asia Pacific segment includes accumulated impairment losses of $159 million as of January 1, 2015 and December 31, 2016.

Intangible Assets, Net (Detail)

Intangible Assets, Net (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Total intangible assets, net [Line Items]
Gross Carrying Amount		$ 546,259	$ 592,976
Accumulated Amortization	[1]	(297,280)	(245,707)
Net		161,644	347,269
Impairment Charge		(87,335)	(15,423)	$ 0
Customer, Affiliate And Advertiser Related Relationships
Total intangible assets, net [Line Items]
Gross Carrying Amount		350,896	355,568
Accumulated Amortization	[1]	(181,451)	(135,513)
Net		102,765	220,055
Impairment Charge		(66,680)
Developed Technology And Patents
Total intangible assets, net [Line Items]
Gross Carrying Amount		128,732	170,289
Accumulated Amortization	[1]	(81,489)	(83,380)
Net		47,243	86,909
Impairment Charge		0
Tradenames, Trademarks, And Domain Names
Total intangible assets, net [Line Items]
Gross Carrying Amount		66,631	67,119
Accumulated Amortization	[1]	(34,340)	(26,814)
Net		11,636	$ 40,305
Impairment Charge		$ (20,655)
[1]	Cumulative foreign currency translation adjustments, reflecting movement in the currencies of the underlying entities, totaled approximately $18 million and $17 million for the years ended as of December 31, 2015 and 2016, respectively.

Intangible Assets, Net (Parenth

Intangible Assets, Net (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Total intangible assets, net [Line Items]
Cumulative foreign currency translation adjustments	$ 17	$ 18

Intangible Assets, Net - Additi

Intangible Assets, Net - Additional Information (Detail) - USD ($)	3 Months Ended			12 Months Ended
	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Total intangible assets, net [Line Items]
Amortization of intangible assets				$ 100,214,000	$ 136,719,000	$ 131,537,000
Estimated amortization expense 2017	$ 76,000,000			76,000,000
Estimated amortization expense 2018	55,000,000			55,000,000
Estimated amortization expense 2019	30,000,000			30,000,000
Estimated amortization expense 2020 and after	1,000,000			1,000,000
Intangible assets impairment charge				$ 87,335,000	15,423,000	0
Impairment of definite-lived intangibles	$ 0
Intangible assets, impairment charge			$ 15,000,000
Tumblr
Total intangible assets, net [Line Items]
Intangible assets impairment charge		$ 87,000,000
Minimum
Total intangible assets, net [Line Items]
Amortizable intangible assets, useful life				1 year
Minimum | Customer, Affiliate And Advertiser Related Relationships
Total intangible assets, net [Line Items]
Amortizable intangible assets, useful life				1 year
Minimum | Developed Technology And Patents
Total intangible assets, net [Line Items]
Amortizable intangible assets, useful life				3 years
Minimum | Tradenames, Trademarks, And Domain Names
Total intangible assets, net [Line Items]
Amortizable intangible assets, useful life				3 years
Maximum
Total intangible assets, net [Line Items]
Amortizable intangible assets, useful life				7 years
Maximum | Customer, Affiliate And Advertiser Related Relationships
Total intangible assets, net [Line Items]
Amortizable intangible assets, useful life				6 years
Maximum | Developed Technology And Patents
Total intangible assets, net [Line Items]
Amortizable intangible assets, useful life				6 years
Maximum | Tradenames, Trademarks, And Domain Names
Total intangible assets, net [Line Items]
Amortizable intangible assets, useful life				7 years
Cost of revenue - other
Total intangible assets, net [Line Items]
Amortization of intangible assets				$ 42,000,000	$ 58,000,000	$ 65,000,000

Basic and Diluted Net Income 81

Basic and Diluted Net Income (Loss) Attributable to Yahoo! Inc. Common Stockholders Per Share - Additional Information (Detail) shares in Millions	12 Months Ended
	Dec. 31, 2014shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share	3

Basic and Diluted Net Income 82

Basic and Diluted Net Income (Loss) Attributable to Yahoo! Inc. - Common Stockholders Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended																12 Months Ended
		Dec. 31, 2016	[1]	Sep. 30, 2016	[2]	Jun. 30, 2016	[3]	Mar. 31, 2016	[4]	Dec. 31, 2015	[5]	Sep. 30, 2015	[6]	Jun. 30, 2015	[7]	Mar. 31, 2015	[8]	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Net income (loss) attributable to Yahoo! Inc.		$ 161,998		$ 162,826		$ (439,913)		$ (99,232)		$ (4,434,987)		$ 76,261		$ (21,554)		$ 21,198		$ (214,321)	$ (4,359,082)	$ 7,521,731
Less: Net income allocated to participating securities																		(4)	0	(68)
Net income (loss) attributable to Yahoo! Inc. common stockholders-basic																		$ (214,325)	$ (4,359,082)	$ 7,521,663
Weighted average common shares		953,798		951,421		948,432		945,719		943,425		940,822		937,569		934,748		949,843	939,141	987,819
Net income (loss) attributable to Yahoo! Inc. common stockholders per share-basic		$ 0.17		$ 0.17		$ (0.46)		$ (0.10)		$ (4.70)		$ 0.08		$ (0.02)		$ 0.02		$ (0.23)	$ (4.64)	$ 7.61
Net income (loss) attributable to Yahoo! Inc.		$ 161,998		$ 162,826		$ (439,913)		$ (99,232)		$ (4,434,987)		$ 76,261		$ (21,554)		$ 21,198		$ (214,321)	$ (4,359,082)	$ 7,521,731
Less: Net income allocated to participating securities																		0	0	(67)
Less: Effect of dilutive securities issued by equity investees																		0	0	(43,689)
Net income (loss) attributable to Yahoo! Inc. common stockholders-diluted																		$ (214,321)	$ (4,359,082)	$ 7,477,975
Denominator for basic calculation		953,798		951,421		948,432		945,719		943,425		940,822		937,569		934,748		949,843	939,141	987,819
Denominator for diluted calculation		958,624		957,304		948,432		945,719		943,425		946,934		937,569		947,976		949,843	939,141	1,004,108
Net income (loss) attributable to Yahoo! Inc. common stockholders per share-diluted		$ 0.17		$ 0.17		$ (0.46)		$ (0.10)		$ (4.70)		$ 0.08		$ (0.02)		$ 0.02		$ (0.23)	$ (4.64)	$ 7.45
Restricted Stock Units (RSUs)
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Incremental common shares																		0	0	12,365
Stock Options and Employee Stock Purchase Plan
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Incremental common shares	[9]																	0	0	3,924
[1]	Net income attributable to Yahoo! Inc. for the quarter ended December 31, 2016 includes security incidents costs of $10 million, advisory fees of $6 million and net restructuring charges of $2 million.
[2]	Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2016 includes advisory fees of $27 million, net restructuring charges of $10 million and a loss of $8 million due to the decline in fair value of the Hortonworks warrants.
[3]	Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2016 includes goodwill impairment charge of $395 million and intangible assets impairment charge of $87 million related to Tumblr reporting unit, net restructuring charges of $19 million, advisory fees of $15 million and a gain of $120 million on the sale of land.
[4]	Net loss attributable to Yahoo! Inc. for the quarter ended March 31, 2016 includes net restructuring charges of $57 million, advisory fees of $9 million and a loss of $39 million due to the decline in fair value of the Hortonworks warrants.
[5]	Net loss attributable to Yahoo! Inc. for the quarter ended December 31, 2015 includes goodwill impairment charge of $4.5 billion, asset impairment charge of $2 million related to the originally developed content, intangible assets impairment charge of $15 million, net restructuring charges of $7 million, and advisory fees of $1 million.
[6]	Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2015 includes, a loss of $13 million due to the decline in fair value of the Hortonworks warrants, asset impairment charge of $42 million related to the acquired and originally developed content, and net restructuring charges of $26 million.
[7]	Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2015 includes a gain on sale of patents of $9 million, a gain of $5 million due to the increase in fair value of the Hortonworks warrants, net restructuring charges of $20 million, and advisory fees of $8 million.
[8]	Net income attributable to Yahoo! Inc. for the quarter ended March 31, 2015 includes a gain on sale of patents of $2 million, a loss of $12 million due to the decline in fair value of the Hortonworks warrants, and net restructuring charges of $51 million.
[9]	At the beginning of the first quarter of 2015, the Company discontinued the offering of the Employee Stock Purchase Plan to its employees. See Note 14-"Employee Benefits" for additional information.

Investments in Equity Interes83

Investments in Equity Interests Using the Equity Method of Accounting (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Investment in equity interests	$ 3,192,884	$ 2,503,229
Equity Investment in Yahoo Japan
Schedule of Equity Method Investments [Line Items]
Investment in equity interests	$ 3,192,884	$ 2,496,657
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	$ 0	$ 6,572
Percent ownership of common stock as of balance sheet date	0.00%	20.00%

Investments in Equity Interes84

Investments in Equity Interests Accounted for Using the Equity Method of Accounting - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Dividends received from equity investee, net of withholding taxes	$ 156,968	$ 142,045	$ 83,685
Equity Investment in 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
Cash proceeds from sale of data center assets			11,000
Net gain on sale of data center assets			5,000
Cumulative earnings recorded in retained earnings	4,000,000	3,700,000	3,300,000
Revenue received through commercial arrangements with Yahoo Japan	257,000	228,000	253,000
Receivables balance from Yahoo Japan	$ 46,000	37,000
Alibaba Group
Schedule of Equity Method Investments [Line Items]
Royalty received		$ 199,000	$ 281,000
Royalty payment obligation period end	Sep. 24, 2014
Deferred revenue recognition period	Sep. 18, 2015

Investments in Equity Interes85

Investments in Equity Interests Accounted for Using the Equity Method of Accounting - Yahoo Japan Condensed Financial Information Operating Data (Detail) - Equity Investment in Yahoo Japan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Revenue	$ 4,368,106	$ 3,769,410	$ 4,046,412
Gross profit	3,415,075	2,983,880	3,262,450
Income from operations	1,515,171	1,609,403	1,896,368
Net income	1,020,168	1,092,657	1,236,583
Net income attributable to Yahoo Japan	$ 1,028,076	$ 1,092,048	$ 1,225,221

Investments in Equity Interes86

Investments in Equity Interests Accounted for Using the Equity Method of Accounting - Yahoo Japan Condensed Financial Information Balance Sheet Data (Detail) - Equity Investment in Yahoo Japan - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 30, 2015
Schedule of Equity Method Investments [Line Items]
Current assets	$ 7,155,657	$ 6,150,688
Long-term assets	4,332,498	2,430,699
Current liabilities	2,866,924	2,003,960
Long-term liabilities	435,253	245,834
Noncontrolling interests	$ 209,363	$ 165,601

Foreign Currency Derivative F87

Foreign Currency Derivative Financial Instruments, Notional Amounts of Outstanding Derivative Contracts (Detail) - Foreign Currency Derivative Contracts - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Derivative notional amount	$ 600	$ 1,500
Designated as Hedging Instrument | Net Investment Hedges
Derivative [Line Items]
Derivative notional amount	200	1,150	$ 1,647
Designated as Hedging Instrument | Cash Flow Hedges
Derivative [Line Items]
Derivative notional amount	19	75	222
Not Designated as Hedging Instrument | Balance Sheet Hedges
Derivative [Line Items]
Derivative notional amount	$ 342	$ 225	$ 243

Foreign Currency Derivative F88

Foreign Currency Derivative Financial Instruments, Foreign Currency Derivative Activity (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Derivative [Line Items]
Gain (Loss) Recorded in Other Income (Expense), Net	$ 27,428		$ (4,376)		$ (15,978)
Designated as Hedging Instrument | Net Investment Hedges
Derivative [Line Items]
Beginning Fair Value	74,000		185,000
Settlement Payment (Receipt), Net	(30,000)		(117,000)
Gain (Loss) Recorded in Other Income (Expense), Net	0		1,000
Gain (Loss) Recorded in Other Comprehensive Income (Loss)	(53,000)	[1]	5,000	[2]
Gain (Loss) Recorded in Revenue	0		0
Ending Fair Value	(9,000)		74,000		185,000
Designated as Hedging Instrument | Cash Flow Hedges
Derivative [Line Items]
Beginning Fair Value	2,000		8,000
Settlement Payment (Receipt), Net	5,000		0
Gain (Loss) Recorded in Other Income (Expense), Net	1,000		(1,000)
Gain (Loss) Recorded in Other Comprehensive Income (Loss)	(1,000)		(2,000)
Gain (Loss) Recorded in Revenue	(7,000)		(3,000)
Ending Fair Value	0		2,000		8,000
Not Designated as Hedging Instrument | Balance Sheet Hedges
Derivative [Line Items]
Beginning Fair Value	2,000		4,000
Settlement Payment (Receipt), Net	(4,000)		(21,000)
Gain (Loss) Recorded in Other Income (Expense), Net	13,000		19,000
Gain (Loss) Recorded in Other Comprehensive Income (Loss)	0		0
Gain (Loss) Recorded in Revenue	0		0
Ending Fair Value	$ 11,000		$ 2,000		$ 4,000
[1]	This amount does not reflect the tax impact of $19 million recorded during the twelve months ended December 31, 2016. The $34 million after tax impact of the loss recorded within other comprehensive income (loss) was included in accumulated other comprehensive income on the Company's consolidated balance sheets as of December 31, 2016.
[2]	This amount does not reflect the tax impact of $2 million recorded during the twelve months ended December 31, 2015. The $3 million after tax impact of the gain recorded within other comprehensive income (loss) was included in accumulated other comprehensive income on the Company's consolidated balance sheets as of December 31, 2015.

Foreign Currency Derivative F89

Foreign Currency Derivative Financial Instruments, Foreign Currency Derivative Activity (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Net investment hedge CTA gains (losses), taxes	$ 18,766	$ (1,941)	$ (79,037)
Net investment hedge CTA gains (losses), net of taxes	$ (34,005)	$ 3,333	$ 130,904

Foreign Currency Derivative F90

Foreign Currency Derivative Financial Instruments, Foreign Currency Derivative Contracts Balance Sheet Location and Ending Fair Value (Detail) - Foreign Currency Derivative Contracts - USD ($) $ in Millions		Dec. 31, 2016	Dec. 31, 2015
Designated as Hedging Instrument | Net Investment Hedges | Assets
Derivatives, Fair Value [Line Items]
Foreign currency forward contract, fair value asset	[1]	$ 0	$ 79
Designated as Hedging Instrument | Net Investment Hedges | Liabilities
Derivatives, Fair Value [Line Items]
Foreign currency forward contract, fair value liability	[2]	(9)	(5)
Designated as Hedging Instrument | Cash Flow Hedges | Assets
Derivatives, Fair Value [Line Items]
Foreign currency forward contract, fair value asset	[1]	0	2
Designated as Hedging Instrument | Cash Flow Hedges | Liabilities
Derivatives, Fair Value [Line Items]
Foreign currency forward contract, fair value liability	[2]	0	0
Not Designated as Hedging Instrument | Balance Sheet Hedges | Assets
Derivatives, Fair Value [Line Items]
Foreign currency forward contract, fair value asset	[1]	12	3
Not Designated as Hedging Instrument | Balance Sheet Hedges | Liabilities
Derivatives, Fair Value [Line Items]
Foreign currency forward contract, fair value liability	[2]	$ (1)	$ (1)
[1]	Included in prepaid expenses and other current assets or other long-term assets and investments on the consolidated balance sheets.
[2]	Included in other accrued expenses and current liabilities or other long-term liabilities on the consolidated balance sheets.

Credit Agreement - Additional I

Credit Agreement - Additional Information (Detail) - After Amendment $ in Millions	12 Months Ended
	Dec. 31, 2016USD ($)
Line of Credit Facility [Line Items]
Unsecured revolving credit facility, terminated amount	$ 750
Unsecured revolving credit facility Termination date	May 23, 2016

Convertible Notes - Additional

Convertible Notes - Additional Information (Detail) - Convertible Senior Notes - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2013
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. 1, 2018
Effective interest rate		5.26%
Equity component	[1]	$ 305,569	$ 305,569
Deferred tax liability		$ 37,000
Number of option counterparties adjusted the strike price		2
Strike price of warrants		$ 71.24
[1]	Recorded on the consolidated balance sheet within additional paid-in capital.

Convertible Notes, Schedule of

Convertible Notes, Schedule of Notes (Detail) - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Net carrying amount		$ 1,299,945	$ 1,233,485
Convertible Senior Notes
Debt Instrument [Line Items]
Principal		1,437,500	1,437,500
Less: note discount		(137,555)	(204,015)
Net carrying amount		1,299,945	1,233,485
Equity component	[1]	$ 305,569	$ 305,569
[1]	Recorded on the consolidated balance sheet within additional paid-in capital.

Convertible Notes, Interest Exp

Convertible Notes, Interest Expense Recognized Related To Notes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Accretion of convertible note discount	$ 66,461	$ 63,061	$ 59,838

Convertible Notes, Fair Value a

Convertible Notes, Fair Value and Carrying Value of Notes (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Carrying Value	$ 1,299,945	$ 1,233,485
Convertible Senior Notes
Debt Instrument [Line Items]
Carrying Value	1,299,945	1,233,485
Fair Value Measurements At Reporting Date Using Level 2 | Convertible Senior Notes
Debt Instrument [Line Items]
Fair Value	$ 1,314,876	$ 1,250,124

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) pure in Millions	Mar. 01, 2017Claim	Jan. 24, 2017Claim	Dec. 14, 2016	Sep. 22, 2016	Jan. 31, 2016Defendant	Dec. 31, 2016USD ($)	Dec. 31, 2016USD ($)Building	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Commitments and Contingencies Disclosure [Line Items]
Rent expense for operating leases							$ 60,000,000	$ 77,000,000	$ 86,000,000
Number of user accounts stolen				500		32
Maximum
Commitments and Contingencies Disclosure [Line Items]
Operating and capital lease agreements, original lease period							15 years
Operating and capital lease agreements, expiry year							2,025
Minimum
Commitments and Contingencies Disclosure [Line Items]
Operating and capital lease agreements, expiry year							2,017
Number of user accounts stolen			1,000
Affiliate Commitments
Commitments and Contingencies Disclosure [Line Items]
Total commitments						$ 925,000,000	$ 925,000,000
Payable in 2017						300,000,000	300,000,000
Payable in 2018						300,000,000	300,000,000
Payable in 2019						300,000,000	300,000,000
Payable in 2020						25,000,000	25,000,000
Non-cancelable Obligations
Commitments and Contingencies Disclosure [Line Items]
Non-cancelable commitments						172,000,000	172,000,000
Payable in 2017						86,000,000	86,000,000
Payable in 2018						55,000,000	55,000,000
Payable in 2019						17,000,000	17,000,000
Payable in 2020						4,000,000	4,000,000
Payable in 2021						3,000,000	3,000,000
Payable thereafter						7,000,000	7,000,000
Intellectual Property Arrangements
Commitments and Contingencies Disclosure [Line Items]
Intellectual property arrangements through 2023							$ 12,000,000
Intellectual property arrangements, expiration year							2,023
California | Buildings
Commitments and Contingencies Disclosure [Line Items]
Number of buildings obligated to make payments for notes payable | Building							2
Note Payable Obligations						52,000,000	$ 52,000,000
Payable in 2017						5,000,000	5,000,000
Payable in 2018						5,000,000	5,000,000
Payable in 2019						5,000,000	5,000,000
Payable in 2020						5,000,000	5,000,000
Payable in 2021						5,000,000	5,000,000
Payable thereafter						27,000,000	27,000,000
Putative Consumer Class Action | Subsequent Event
Commitments and Contingencies Disclosure [Line Items]
Number of lawsuits filed | Claim	43
Putative Stockholder Class | Subsequent Event
Commitments and Contingencies Disclosure [Line Items]
Number of lawsuits filed | Claim		1
Stockholder Derivative Actions | Subsequent Event
Commitments and Contingencies Disclosure [Line Items]
Number of lawsuits filed | Claim	4
Standby Letters of Credit
Commitments and Contingencies Disclosure [Line Items]
Standby letters of credit outstanding						38,000,000	38,000,000
TCPA Litigation Concerning Yahoo Messenger
Commitments and Contingencies Disclosure [Line Items]
Loss contingency, loss in period							1,500
TCPA Litigation Concerning Yahoo Messenger | Maximum
Commitments and Contingencies Disclosure [Line Items]
Penalty per violation						1,500	1,500
TCPA Litigation Concerning Yahoo Messenger | Minimum
Commitments and Contingencies Disclosure [Line Items]
Number of members comprised in the certified class | Defendant					300,000
Penalty per violation						$ 500	$ 500

Commitments and Contingencies,

Commitments and Contingencies, Lease Commitments (Detail) $ in Millions	Dec. 31, 2016USD ($)
Commitments and Contingencies Disclosure [Line Items]
Gross operating lease commitments, 2017	$ 103
Gross operating lease commitments, 2018	75
Gross operating lease commitments, 2019	60
Gross operating lease commitments, 2020	47
Gross operating lease commitments, 2021	37
Gross operating lease commitments, due after 5 years	86
Total gross operating lease commitments	408
Sublease income, 2017	(16)
Sublease income, 2018	(12)
Sublease income, 2019	(9)
Sublease income, 2020	(7)
Sublease income, 2021	(5)
Sublease income, Due after 5 years	(2)
Total sublease income	(51)
Net operating lease commitments, 2017	87
Net operating lease commitments, 2018	63
Net operating lease commitments, 2019	51
Net operating lease commitments, 2020	40
Net operating lease commitments, 2021	32
Net operating lease commitments, Due after 5 years	84
Total net operating lease commitments	$ 357

Commitments and Contingencies98

Commitments and Contingencies, Capital Lease Commitment (Detail) $ in Millions	Dec. 31, 2016USD ($)
Schedule of Capital Lease Obligations [Line Items]
Years ending December 31, 2017	$ 11
2,018	9
2,019	5
2,020	0
2,021	0
Due after 5 years	3
Gross capital lease commitments	28
Less: interest	5
Net capital lease commitments included in other accrued expenses and current liabilities and other long-term liabilities	$ 23

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($)	1 Months Ended		2 Months Ended		12 Months Ended
	Oct. 30, 2014	Sep. 30, 2014	Dec. 09, 2014	Oct. 17, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Mar. 31, 2015	Nov. 30, 2013
Stockholders Equity [Line Items]
Preferred stock, shares authorized					10,000,000	10,000,000
Payment for repurchases of common stock					$ 0	$ 203,771,000	$ 4,163,227,000
Stock repurchased and retired					0	0	94,000,000
Common stock
Stockholders Equity [Line Items]
Repurchases of common stock, shares					0	4,276,000	61,838,000
Retirement of treasury stock							$ 94,000
Additional Paid-in Capital
Stockholders Equity [Line Items]
Retirement of treasury stock					$ 0	$ 0	794,596,000
Retained earnings
Stockholders Equity [Line Items]
Retirement of treasury stock					$ 0	$ 0	$ 2,852,124,000
Accelerated Share Repurchase Agreements
Stockholders Equity [Line Items]
Repurchases of common stock, shares	15,000,000	15,000,000	16,000,000	23,500,000
Repurchases of common stock		$ 600,000,000	$ 800,000,000	$ 933,000,000
Payment for repurchases of common stock	$ 1,000,000,000	1,100,000,000
Accelerated Share Repurchases, Settlement (Payment) or Receipt			$ 200,000,000	$ 167,000,000
Accelerated share repurchase agreement, unsettled contract		$ 500,000,000
Accelerated Share Repurchase Agreements | Common stock
Stockholders Equity [Line Items]
Repurchases of common stock, shares					0	0	39,859,000
Stock Repurchase Program
Stockholders Equity [Line Items]
Repurchases of common stock, shares							62,000,000
Average purchase price per share of common stock repurchased during the period							$ 39.30
Repurchases of common stock							$ 2,400,000,000
November 2013 Plan
Stockholders Equity [Line Items]
Treasury stock repurchase authorization									$ 5,000,000,000
Stock repurchase program expiration date					2016-12
Remaining authorized purchase capacity					$ 5,000,000,000
Repurchases of common stock, shares						4,276,000
Average purchase price per share of common stock repurchased during the period						$ 47.65
Repurchases of common stock						$ 203,771,000
March 2015 Plan
Stockholders Equity [Line Items]
Treasury stock repurchase authorization								$ 2,000,000,000
Stock repurchase program expiration date					2018-03
Remaining authorized purchase capacity								$ 2,000,000,000
Repurchases of common stock, shares					0

Employee Benefits - Additional

Employee Benefits - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Rate at which the company matches employee contributions	25.00%
Stock-based compensation expense	$ 491,902	$ 457,153	$ 420,174
Weighted-average grant date fair value of all options granted and assumed during period		$ 20.31	$ 31.31
Options granted	0
Payments made to taxing authorities for employees' tax obligations	$ 209,053	$ 257,731	$ 280,879
Excess tax benefits from stock-based awards	18,007	58,282	149,582
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total intrinsic value of options exercised	27,000	53,000	167,000
Unamortized stock-based compensation expense	$ 7,000
Stock-based compensation, recognition period	10 months 24 days
Cash received from options exercised	$ 18,000
Tax benefit from stock option exercises	$ 6,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested	14,427,000
Shares withheld to settle employees' minimum statutory obligation for applicable income and other employment taxes	5,000,000
Restricted Stock and Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, recognition period	2 years 3 months 18 days
Unamortized stock-based compensation expense	$ 497,000
Total fair value of restricted stock awards vested	$ 470,000	$ 502,000	$ 415,000
Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity award vesting period	4 years	4 years	4 years	4 years
Stock-based compensation, recognition period	12 months
Performance Based Restricted Stock Units | Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity award vesting period	3 years	3 years	3 years	3 years
First Tranche | Performance Based Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, recognition period	12 months
Stock options grant date fair value	$ 13,000
First Tranche | Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units grant date fair value	$ 10,000	$ 9,000
Restricted stock units grant date	2016-03
Second Tranche | Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units grant date fair value	$ 8,000
Restricted stock units grant date	2015-03
Tranche Three | Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units grant date fair value	$ 4,000
Restricted stock units grant date	2014-02
Fourth Tranche | Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units grant date fair value	$ 8,000
Restricted stock units grant date	2013-02
GAAP Revenue
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Financial performance metrics for stock option awards	33.3333%
Financial performance metrics for restricted stock units awards	33.3333%
Revenue ex -TAC
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Financial performance metrics for stock option awards	33.3333%
Financial performance metrics for restricted stock units awards	33.3333%
Adjusted EBITDA
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Financial performance metrics for stock option awards	33.3333%
Financial performance metrics for restricted stock units awards	33.3333%
Stock Plan | Options Granted Prior To May 19, 2005
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration of stock awards, years	10 years
Stock Plan | Options Granted After May 19, 2005
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration of stock awards, years	7 years
Stock Plan | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available to be awarded	784,000,000
Shares available for issuance	96,000,000
Stock Plan | Full Value Stock Award | Other Than Options Granted After June 25, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted against share limits	1.75
Stock Plan | Full Value Stock Award | Other Than Options Granted After June 25, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted against share limits	2.5
Directors' Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available to be awarded	9,000,000
Shares available for issuance	4,000,000
Number of shares granted against share limits	1.75
Directors' Plan | Options Granted After May 25, 2006
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration of stock awards, years	7 years
Equity award vesting period	1 year
Vesting period installments	Equal quarterly installments over one year
Directors' Plan | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity award vesting period	1 year
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Price as a percentage of fair value of common stock purchased under employee stock purchase plan	90.00%
Stock-based compensation expense		2,000	$ 12,000
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity award vesting period	1 year
Minimum | Performance Based Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards vesting percentage for each performance period	0.00%
Minimum | Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards vesting percentage of annual target amount based on performance	0.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity award vesting period	4 years
Maximum | Performance Based Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards vesting percentage for each performance period	100.00%
Maximum | Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards vesting percentage of annual target amount based on performance	200.00%
Maximum | Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity award vesting period	4 years
Maximum | Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock purchase plan payroll deductions percent	15.00%
Initial Grant | Directors' Plan | Options Granted Before May 25, 2006
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity award vesting period	4 years
Vesting period installments	Equal monthly installments over four years
Annual Grant | Directors' Plan | Options Granted Before May 25, 2006
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage upon one year anniversary of date of grant	25.00%
Number of installments for vesting period	36
Annual Grant | Minimum | Directors' Plan | Options Granted Before May 25, 2006
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration of stock awards, years	7 years
Annual Grant | Maximum | Directors' Plan | Options Granted Before May 25, 2006
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration of stock awards, years	10 years
401(k) Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Benefit plan employee contribution	1.00%
401(k) Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Benefit plan employee contribution	100.00%
401(k)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employer contributions to benefit plans	$ 18,000	21,000	19,000
Other Foreign Benefit Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employer contributions to benefit plans	$ 12,000	$ 15,000	$ 16,000

Employee Benefits, Stock Option

Employee Benefits, Stock Option Activity (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, Beginning balance	[1]	6,522
Options granted		0
Options assumed in acquisitions		0
Options exercised	[2]	(1,203)
Options expired		(442)
Options cancelled/forfeited		(383)
Outstanding, Ending balance	[1]	4,494	6,522
Vested and expected to vest, outstanding, balance	[3]	4,467
Exercisable at December 31, 2016		3,537
Weighted average exercise price per share, Beginning balance	[1]	$ 18.82
Weighted average exercise price per share, options granted		0
Weighted average exercise price per share, options assumed in acquisitions		0
Weighted average exercise price per share, options exercised	[2]	14.56
Weighted average exercise price per share, options expired		18.71
Weighted average exercise price per share, options cancelled/forfeited		18
Weighted average exercise price per share, Ending balance	[1]	20.04	$ 18.82
Vested and expected to vest, weighted average exercise price	[3]	18.11
Exercisable at December 31, 2016, weighted average exercise price		$ 18.15
Weighted average remaining contractual life (in years)	[1]	2 years 11 months 27 days	4 years 11 days
Vested and expected to vest, weighted average remaining contractual life (in years)	[3]	2 years 11 months 23 days
Vested and expected to vest, exercisable, weighted average remaining contractual life (in years)		2 years 9 months 7 days
Aggregate intrinsic value, Beginning balance	[1]	$ 103,230
Aggregate intrinsic value, Ending balance	[1]	92,503	$ 103,230
Vested and expected to vest, aggregate intrinsic value	[3]	91,950
Exercisable at December 31, 2016		$ 72,708
[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.
[3]	The expected to vest options are the result of applying the pre-vesting forfeiture rate assumptions to total outstanding options.

Employee Benefits, Weighted Ave

Employee Benefits, Weighted Average Assumptions Used to Calculate Fair Value of Options Granted Including Assumed Options from Acquisitions (Detail)		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	[1],[2]		0.00%
Risk-free interest rate	[1],[3]		0.00%
Expected volatility	[1],[4]		36.80%
Expected life (in years)	[1],[5]		3 months
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	[2]	0.00%	0.00%
Risk-free interest rate	[3]	0.90%	1.40%
Expected volatility	[4]	34.50%	34.50%
Expected life (in years)	[5]	2 years 6 months	3 years 9 months 29 days
[1]	During the first quarter of 2015, the Company discontinued the offering of the Employee Stock Purchase Plan to its employees.
[2]	The Company currently has no history or expectation of paying cash dividends on its common stock in the near future.
[3]	The risk-free interest rate is based on the U.S. Treasury yield for a term consistent with the expected term of the awards in effect at the time of grant.
[4]	The Company estimates the volatility of its common stock at the date of grant based on the implied volatility of publicly traded options on its common stock, with a term of one year or greater.
[5]	The expected life of stock options granted under the Plans is based on historical exercise patterns, which the Company believes are representative of future behavior. New grants issued by the Company had an expected life of 4 years in 2014. In 2015 and 2016, the Company did not issue new stock options. Options assumed in acquisitions had expected lives of less than 3 years.

Employee Benefits, Weighted 103

Employee Benefits, Weighted Average Assumptions Used to Calculate Fair Value of Options Granted Including Assumed Options from Acquisitions (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life of new grants issued		4 years
Expected life of options assumed in acquisitions	Less than 3 years

Employee Benefits, Restricted S

Employee Benefits, Restricted Stock Units Activity (Detail) - Restricted Stock Units (RSUs) shares in Thousands	12 Months Ended
	Dec. 31, 2016$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awarded and unvested, Beginning balance | shares	28,739	[1]
Granted | shares	14,893	[2]
Vested | shares	(14,427)
Cancelled/Forfeited | shares	(6,955)
Awarded and unvested, Ending balance | shares	22,250	[1]
Weighted-average grant date fair value per share, Beginning balance | $ / shares	$ 39.15	[1]
Weighted-average grant date fair value per share, granted shares | $ / shares	34.54	[2]
Weighted-average grant date fair value per share, vested shares | $ / shares	32.49
Weighted-average grant date fair value per share, cancelled/forfeited shares | $ / shares	35.88
Weighted-average grant date fair value per share, Ending balance | $ / shares	$ 41.40	[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]	Includes the maximum number of shares issuable under the performance-based restricted stock unit awards granted during the year ended December 31, 2016 (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 year ended December 31, 2016.

Restructuring Charges, Net (Det

Restructuring Charges, Net (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Employee severance pay and related costs									$ 57,940	$ 69,042	$ 30,749
Non-cancelable lease, contract termination, and other charges									26,126	36,526	79,317
Reversals of previous charges									(4,038)	(7,404)	(3,222)
Non-cash accelerations of stock-based compensation expense									7,374	2,705	0
Other non-cash (credits) charges, net									1,227	3,150	(3,394)
Restructuring charges, net	$ 2,000	$ 10,000	$ 19,000	$ 57,000	$ 7,000	$ 26,000	$ 20,000	$ 51,000	$ 88,629	$ 104,019	$ 103,450

Restructuring Charges, Net by S

Restructuring Charges, Net by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	$ 2,000	$ 10,000	$ 19,000	$ 57,000	$ 7,000	$ 26,000	$ 20,000	$ 51,000	$ 88,629	$ 104,019	$ 103,450
Americas Segment
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net									65,300	68,637	76,134
Europe Middle East Africa Segment
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net									19,379	31,251	25,612
Asia Pacific Segment
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net									$ 3,950	$ 4,131	$ 1,704

Restructuring Charges, Net - Ad

Restructuring Charges, Net - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)Office	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Restructuring Cost and Reserve [Line Items]
Expected workforce reduction, percentage	15.00%
Number of offices to be closed | Office	6
Restructuring liability	$ 43,458	$ 65,891	$ 83,608
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring liability	$ 3,000
Restructuring liability, expected pay out period	The Company expects to substantially pay out by the end of second quarter of 2017
Employee Severance | Cash Charges
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring charges incurred	$ 47,000
Non-Cancelable Lease Costs
Restructuring Cost and Reserve [Line Items]
Restructuring liability	$ 40,000
Restructuring liability, expected pay out period	The Company expects to pay over the terms of the related obligations through the fourth quarter of 2025
Lease termination and other exit of facilities related costs | Cash Charges
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring charges incurred	$ 17,000
Share Based Compensation | Non-cash Charges
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring charges incurred	7,000
Impairment Losses | Non-cash Charges | Maximum
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring charges incurred	$ 1,000

Restructuring Charges, Net, Res

Restructuring Charges, Net, Restructuring Accrual Activity (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Beginning balance				$ 65,891				$ 83,608	$ 65,891	$ 83,608
Restructuring charges	$ 2,000	$ 10,000	$ 19,000	$ 57,000	$ 7,000	$ 26,000	$ 20,000	$ 51,000	88,629	104,019	$ 103,450
Cash paid									(102,277)	(114,749)
Non-cash accelerations of stock-based compensation expense									(7,374)	(2,705)	0
Foreign currency translation and other adjustments									(1,411)	(4,282)
Ending balance	$ 43,458				$ 65,891				$ 43,458	$ 65,891	$ 83,608

Restructuring Charges, Net, Cla

Restructuring Charges, Net, Classification of Restructuring Accruals (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Accrued expenses and other current liabilities	$ 27,041	$ 40,283
Other long-term liabilities	16,417	25,608
Total restructuring accruals	$ 43,458	$ 65,891	$ 83,608

Restructuring Charges, Net, 110

Restructuring Charges, Net, Restructuring Accrual by Segment (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Total restructuring accruals	$ 43,458	$ 65,891	$ 83,608
Americas Segment
Restructuring Cost and Reserve [Line Items]
Total restructuring accruals	38,041	47,054
Europe Middle East Africa Segment
Restructuring Cost and Reserve [Line Items]
Total restructuring accruals	5,263	18,389
Asia Pacific Segment
Restructuring Cost and Reserve [Line Items]
Total restructuring accruals	$ 154	$ 448

Income Taxes, Income (Loss) Bef

Income Taxes, Income (Loss) Before Income Taxes and Earnings in Equity Interests (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Components of Income Before Income Tax Expense (Benefit) [Line Items]
United States	$ (819,838)	$ (4,394,462)	$ 10,572,290
Foreign	120,864	(429,814)	(59,909)
Income (loss) before income taxes and earnings in equity interests	$ (698,974)	$ (4,824,276)	$ 10,512,381

Income Taxes, Provision For Inc

Income Taxes, Provision For Income Tax (Detail) - USD ($) $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2016	[1]	Sep. 30, 2016	[2]	Jun. 30, 2016	[3]	Mar. 31, 2016	[4]	Dec. 31, 2015	[5]	Sep. 30, 2015	[6]	Jun. 30, 2015	[7]	Mar. 31, 2015	[8]	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
United States federal																	$ 73,484	$ (89,498)	$ 3,067,395
State																	(1,619)	9,426	454,261
Foreign																	26,644	32,815	50,573
Total current provision (benefit) for income taxes																	98,509	(47,257)	3,572,229
Deferred:
United States federal																	(206,096)	(20,507)	348,887
State																	(18,007)	(31,374)	120,938
Foreign																	(634)	9,540	(3,952)
Total deferred provision (benefit) for income taxes																	(224,737)	(42,341)	465,873
Provision (benefit) for income taxes	$ (1,492)		$ (105,513)		$ 15,543		$ (34,766)		$ (13,985)		$ (93,208)		$ 58,495		$ (40,900)		$ (126,228)	$ (89,598)	$ 4,038,102
[1]	Net income attributable to Yahoo! Inc. for the quarter ended December 31, 2016 includes security incidents costs of $10 million, advisory fees of $6 million and net restructuring charges of $2 million.
[2]	Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2016 includes advisory fees of $27 million, net restructuring charges of $10 million and a loss of $8 million due to the decline in fair value of the Hortonworks warrants.
[3]	Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2016 includes goodwill impairment charge of $395 million and intangible assets impairment charge of $87 million related to Tumblr reporting unit, net restructuring charges of $19 million, advisory fees of $15 million and a gain of $120 million on the sale of land.
[4]	Net loss attributable to Yahoo! Inc. for the quarter ended March 31, 2016 includes net restructuring charges of $57 million, advisory fees of $9 million and a loss of $39 million due to the decline in fair value of the Hortonworks warrants.
[5]	Net loss attributable to Yahoo! Inc. for the quarter ended December 31, 2015 includes goodwill impairment charge of $4.5 billion, asset impairment charge of $2 million related to the originally developed content, intangible assets impairment charge of $15 million, net restructuring charges of $7 million, and advisory fees of $1 million.
[6]	Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2015 includes, a loss of $13 million due to the decline in fair value of the Hortonworks warrants, asset impairment charge of $42 million related to the acquired and originally developed content, and net restructuring charges of $26 million.
[7]	Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2015 includes a gain on sale of patents of $9 million, a gain of $5 million due to the increase in fair value of the Hortonworks warrants, net restructuring charges of $20 million, and advisory fees of $8 million.
[8]	Net income attributable to Yahoo! Inc. for the quarter ended March 31, 2015 includes a gain on sale of patents of $2 million, a loss of $12 million due to the decline in fair value of the Hortonworks warrants, and net restructuring charges of $51 million.

Income Taxes, Reconciliation Ta

Income Taxes, Reconciliation Tax Computed by Applying Statutory Income Tax Rate (Detail) - USD ($) $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2016	[1]	Sep. 30, 2016	[2]	Jun. 30, 2016	[3]	Mar. 31, 2016	[4]	Dec. 31, 2015	[5]	Sep. 30, 2015	[6]	Jun. 30, 2015	[7]	Mar. 31, 2015	[8]	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reconciliation of Statutory Federal Tax Rate [Line Items]
Income tax at the U.S. federal statutory rate of 35 percent																	$ (244,641)	$ (1,688,496)	$ 3,679,333
State income taxes, net of federal benefit																	2,514	(7,912)	400,824
Stock-based compensation expense																	10,482	9,508	8,132
Research tax credits																	(17,291)	(15,659)	(23,775)
Effect of non-U.S. operations																	(18,499)	165,203	(53,079)
Settlement with tax authorities																	(8,400)	(1,981)	(24,870)
Remeasurement of prior year tax positions																	0	(5,286)	0
Acquisition related non-deductible expenses																	13,059	15,970	16,881
Tax liquidation of acquired entities																	0	(56,170)	0
Other																	(1,667)	5,965	3,711
Provision (benefit) for income taxes	$ (1,492)		$ (105,513)		$ 15,543		$ (34,766)		$ (13,985)		$ (93,208)		$ 58,495		$ (40,900)		(126,228)	(89,598)	4,038,102
Goodwill
Reconciliation of Statutory Federal Tax Rate [Line Items]
Impairment charge																	138,215	1,486,792	30,945
Indefinite-lived Intangible Assets [Member]
Reconciliation of Statutory Federal Tax Rate [Line Items]
Impairment charge																	$ 0	$ 2,468	$ 0
[1]	Net income attributable to Yahoo! Inc. for the quarter ended December 31, 2016 includes security incidents costs of $10 million, advisory fees of $6 million and net restructuring charges of $2 million.
[2]	Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2016 includes advisory fees of $27 million, net restructuring charges of $10 million and a loss of $8 million due to the decline in fair value of the Hortonworks warrants.
[3]	Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2016 includes goodwill impairment charge of $395 million and intangible assets impairment charge of $87 million related to Tumblr reporting unit, net restructuring charges of $19 million, advisory fees of $15 million and a gain of $120 million on the sale of land.
[4]	Net loss attributable to Yahoo! Inc. for the quarter ended March 31, 2016 includes net restructuring charges of $57 million, advisory fees of $9 million and a loss of $39 million due to the decline in fair value of the Hortonworks warrants.
[5]	Net loss attributable to Yahoo! Inc. for the quarter ended December 31, 2015 includes goodwill impairment charge of $4.5 billion, asset impairment charge of $2 million related to the originally developed content, intangible assets impairment charge of $15 million, net restructuring charges of $7 million, and advisory fees of $1 million.
[6]	Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2015 includes, a loss of $13 million due to the decline in fair value of the Hortonworks warrants, asset impairment charge of $42 million related to the acquired and originally developed content, and net restructuring charges of $26 million.
[7]	Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2015 includes a gain on sale of patents of $9 million, a gain of $5 million due to the increase in fair value of the Hortonworks warrants, net restructuring charges of $20 million, and advisory fees of $8 million.
[8]	Net income attributable to Yahoo! Inc. for the quarter ended March 31, 2015 includes a gain on sale of patents of $2 million, a loss of $12 million due to the decline in fair value of the Hortonworks warrants, and net restructuring charges of $51 million.

Income Taxes, Deferred Income T

Income Taxes, Deferred Income Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred income tax assets:
Net operating loss and tax credit carryforwards	$ 136,929	$ 185,425
Stock-based compensation expense	39,211	34,644
Non-deductible accrued expenses	172,224	114,519
Deferred revenue	12,345	10,153
Fixed assets	12,181	14,096
Federal benefits relating to tax positions	336,963	308,347
Other	7,281	8,580
Gross deferred income tax assets	717,134	675,764
Valuation allowance	(36,354)	(29,001)
Deferred income tax assets	680,780	646,763
Deferred income tax liabilities:
Purchased intangible assets	(25,833)	(86,905)
Fixed assets	(89,344)	(146,234)
Alibaba unrealized gains	(13,633,988)	(12,611,867)
Unrealized income in investments	(8,837)	(85,761)
Restructuring liabilities	(95)	(4,046)
Other	(1,278)	(2,216)
Deferred income tax liabilities	(13,759,375)	(12,937,029)
Net deferred income tax liabilities	$ (13,078,595)	$ (12,290,266)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands, shares in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2012	Dec. 31, 2013
Income Taxes [Line Items]
Tax payment related to YHK's sale of Alibaba Group ADSs	$ 3,300,000
Alibaba deferred tax liabilities		$ 13,633,988	$ 12,611,867
Valuation allowance		36,354	29,001
Net tax expense (benefit) from one-time distribution of earnings from consolidated foreign subsidiaries		17,000
Undistributed earnings of foreign subsidiaries		3,300,000
Dividend income		172,000
U.S. tax credit for foreign income taxes		67,000
Unrecognized tax benefits		1,073,749	1,067,109	$ 1,023,626		$ 695,285
Amount of unrecognized tax benefits which would affect the effective tax rate if realized		700,000
Interest and penalties expense		24,000	7,000	$ 83,000
Accrued interest and penalties		186,000	$ 167,000
Unrecognized tax benefits increase during period		7,000
Interest paid		5,000
Reasonably possible reduction in unrecognized tax benefits in the next twelve months		$ 20,000
Alibaba Group
Income Taxes [Line Items]
Shares retained by the Company		384
Number of ADSs sold at initial public offering				140
Sale of investments in equity interests, shares					523
State Research Tax Credit Carryforward
Income Taxes [Line Items]
Tax credit carryforwards		$ 200,000
Start of expiration of tax credit carryforwards		Carried forward indefinitely
Federal And California Jurisdiction
Income Taxes [Line Items]
Start of expiration of operating loss carryforwards		2,021
Tax authorities from the Brazilian State | Foreign Tax Authority
Income Taxes [Line Items]
Indirect tax assessed, not accrued		$ 140,000
Tax authorities from the Brazilian State | Foreign Tax Authority | Earliest Tax Year
Income Taxes [Line Items]
Tax assessment year		2,008
Tax authorities from the Brazilian State | Foreign Tax Authority | Latest Tax Year
Income Taxes [Line Items]
Tax assessment year		2,012
Federal
Income Taxes [Line Items]
Net operating loss carryforwards		$ 172,000
Federal | Domestic | Earliest Tax Year
Income Taxes [Line Items]
Tax assessment year		2,011
Federal | Domestic | Latest Tax Year
Income Taxes [Line Items]
Tax assessment year		2,015
California Franchise Tax Board | State | Earliest Tax Year
Income Taxes [Line Items]
Tax assessment year		2,009
Tax assessment year under appeal		2,005
Tax assessment year subject to examination		2,011
California Franchise Tax Board | State | Latest Tax Year
Income Taxes [Line Items]
Tax assessment year		2,010
Tax assessment year under appeal		2,008
Tax assessment year subject to examination		2,015
California | State
Income Taxes [Line Items]
Net operating loss carryforwards		$ 134,000

Income Taxes, Reconciliation of

Income Taxes, Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Contingency [Line Items]
Unrecognized tax benefits balance at January 1	$ 1,067,109	$ 1,023,626	$ 695,285
Gross increase for tax positions of prior years	10,848	27,583	65,606
Gross decrease for tax positions of prior years	(24,529)	(17,748)	(9,954)
Gross increase for tax positions of current year	44,556	41,428	358,434
Settlements	(17,957)	(4,700)	(84,942)
Lapse of statute of limitations	(6,278)	(3,080)	(803)
Unrecognized tax benefits balance at December 31	$ 1,073,749	$ 1,067,109	$ 1,023,626

Income Taxes, Unrecognized Tax

Income Taxes, Unrecognized Tax Benefits Recorded on Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Balance Sheet Classification of Deferred Income Tax Assets and Liabilities [Line Items]
Total unrecognized tax benefits balance	$ 1,073,749	$ 1,067,109	$ 1,023,626	$ 695,285
Amounts netted against related deferred tax assets	(77,024)	(64,601)
Unrecognized tax benefits recorded on consolidated balance sheets	996,725	1,002,508
Amounts classified as accrued expenses and other current liabilities	2,409	12,586
Amounts classified as deferred and other long-term tax liabilities, net	994,316	989,922
Unrecognized tax benefits recorded on consolidated balance sheets	$ 996,725	$ 1,002,508

Transactions with Related Pa118

Transactions with Related Parties - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenue From Related Parties Other Than Yahoo Japan
Related Party Transaction [Line Items]
Percent of total revenue	1.00%	1.00%	1.00%

Segment Information (Detail)

Segment Information (Detail) - USD ($) $ in Thousands		3 Months Ended																12 Months Ended
		Dec. 31, 2016		Sep. 30, 2016		Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Revenue		$ 1,469,140	[1],[2]	$ 1,305,206	[1],[3]	$ 1,307,637	[1],[4]	$ 1,087,152	[1],[5]	$ 1,273,393	[1],[6]	$ 1,225,673	[1],[7]	$ 1,243,265	[1],[8]	$ 1,225,970	[1],[9]	$ 5,169,135	$ 4,968,301	$ 4,618,133
TAC																		1,650,786	877,514	217,531
Revenue ex-TAC																		3,518,349	4,090,787	4,400,602
Global operating costs	[10]																	2,214,842	2,582,235	2,600,577
Gains on sales of patents and land						(120,000)												(121,559)	(11,100)	(97,894)
Asset impairment charge										2,000								0	44,381	0
Goodwill impairment charge										4,460,837								394,901	4,460,837	88,414
Intangible assets impairment charge																		87,335	15,423	0
Depreciation and amortization																		507,555	609,613	606,568
Stock-based compensation expense																		491,902	457,153	420,174
Restructuring charges, net		2,000		10,000		19,000		57,000		7,000		26,000		20,000		51,000		88,629	104,019	103,450
Income (loss) from operations		$ 64,151	[2]	$ (52,319)	[3]	$ (489,676)	[4]	$ (167,214)	[5]	$ (4,530,034)	[6]	$ (86,312)	[7]	$ (44,794)	[8]	$ (87,354)	[9]	(645,058)	(4,748,494)	142,942
Americas Segment
Segment Reporting Information [Line Items]
Revenue	[11]																	4,172,836	3,976,770	3,517,861
TAC	[11]																	1,463,221	788,725	166,545
Revenue ex-TAC																		2,709,615	3,188,045	3,351,316
Direct costs by segment	[12]																	263,010	284,875	249,971
Goodwill impairment charge	[13]																	394,901	3,929,576
Restructuring charges, net																		65,300	68,637	76,134
Europe Middle East Africa Segment
Segment Reporting Information [Line Items]
Revenue	[11]																	397,768	343,646	374,833
TAC	[11]																	144,547	57,284	36,867
Revenue ex-TAC																		253,221	286,362	337,966
Direct costs by segment	[12]																	51,597	95,789	87,490
Goodwill impairment charge	[14]																	0	531,261
Restructuring charges, net																		19,379	31,251	25,612
Asia Pacific Segment
Segment Reporting Information [Line Items]
Revenue	[11]																	598,531	647,885	725,439
TAC	[11]																	43,018	31,505	14,119
Revenue ex-TAC																		555,513	616,380	711,320
Direct costs by segment	[12]																	185,195	196,056	198,910
Goodwill impairment charge	[15]																	0	0
Restructuring charges, net																		$ 3,950	$ 4,131	$ 1,704
[1]	Commencing in the second quarter of 2016, TAC payments related to the Microsoft Search Agreement, which previously would have been recorded as a reduction to revenue, began to be recorded as cost of revenue-TAC due to a required change in revenue presentation. See Note 1-"The Company and Summary of Significant Accounting Policies" and Note 19-"Microsoft Search Agreement" in the Notes to the Company's consolidated financial statements for additional information.
[2]	Net income attributable to Yahoo! Inc. for the quarter ended December 31, 2016 includes security incidents costs of $10 million, advisory fees of $6 million and net restructuring charges of $2 million.
[3]	Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2016 includes advisory fees of $27 million, net restructuring charges of $10 million and a loss of $8 million due to the decline in fair value of the Hortonworks warrants.
[4]	Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2016 includes goodwill impairment charge of $395 million and intangible assets impairment charge of $87 million related to Tumblr reporting unit, net restructuring charges of $19 million, advisory fees of $15 million and a gain of $120 million on the sale of land.
[5]	Net loss attributable to Yahoo! Inc. for the quarter ended March 31, 2016 includes net restructuring charges of $57 million, advisory fees of $9 million and a loss of $39 million due to the decline in fair value of the Hortonworks warrants.
[6]	Net loss attributable to Yahoo! Inc. for the quarter ended December 31, 2015 includes goodwill impairment charge of $4.5 billion, asset impairment charge of $2 million related to the originally developed content, intangible assets impairment charge of $15 million, net restructuring charges of $7 million, and advisory fees of $1 million.
[7]	Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2015 includes, a loss of $13 million due to the decline in fair value of the Hortonworks warrants, asset impairment charge of $42 million related to the acquired and originally developed content, and net restructuring charges of $26 million.
[8]	Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2015 includes a gain on sale of patents of $9 million, a gain of $5 million due to the increase in fair value of the Hortonworks warrants, net restructuring charges of $20 million, and advisory fees of $8 million.
[9]	Net income attributable to Yahoo! Inc. for the quarter ended March 31, 2015 includes a gain on sale of patents of $2 million, a loss of $12 million due to the decline in fair value of the Hortonworks warrants, and net restructuring charges of $51 million.
[10]	Global operating costs include product development, marketing, real estate workplace, general and administrative, account management costs, and other corporate expenses that are managed on a global basis and that are not directly attributable to any particular segment. Beginning in the second quarter of 2016, certain account management costs associated with Yahoo Properties are managed globally and included as global costs. Prior period amounts have been revised to conform to the current presentation.
[11]	Commencing in the second quarter of 2016, TAC payments related to the Microsoft Search Agreement, which previously would have been recorded as a reduction to revenue, began to be recorded as cost of revenue-TAC due to a required change in revenue presentation. See Note 1-"The Company and Summary of Significant Accounting Policies" and Note 19-"Microsoft Search Agreement" for additional information.
[12]	Direct costs for each segment include certain cost of revenue-other and costs associated with the local sales teams. Prior to the second quarter of 2016, certain account management costs associated with Yahoo Properties were managed locally and included as direct costs for each segment. Prior period amounts have been revised to conform to the current presentation.
[13]	Gross goodwill balances for the Americas segment were $4.3 billion as of January 1, 2015 and $4.4 billion as of December 31, 2016. The Americas segment includes accumulated impairment losses of $4.3 billion as of December 31, 2016.
[14]	Gross goodwill balances for the EMEA segment were $1.2 billion as of January 1, 2015 and December 31, 2016. The EMEA segment includes accumulated impairment losses of $630 million as of January 1, 2015, and $1.2 billion as of December 31, 2016.
[15]	Gross goodwill balances for the Asia Pacific segment were $457 million as of January 1, 2015 and $451 million as of December 31, 2016. The Asia Pacific segment includes accumulated impairment losses of $159 million as of January 1, 2015 and December 31, 2016.

Segments, Capital Expenditures

Segments, Capital Expenditures by Segment (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total capital expenditures, net		$ (10,678)	$ 542,987	$ 395,615
Americas Segment
Segment Reporting Information [Line Items]
Total capital expenditures, net	[1]	(46,455)	490,780	357,512
Europe Middle East Africa Segment
Segment Reporting Information [Line Items]
Total capital expenditures, net		14,637	25,479	20,034
Asia Pacific Segment
Segment Reporting Information [Line Items]
Total capital expenditures, net		$ 21,140	$ 26,728	$ 18,069
[1]	2016 includes net proceeds of $246 million associated with the sale of certain property assets located in Santa Clara, California. See Note 4-"Acquisitions and Dispositions" for additional information.

Segments, Capital Expenditur121

Segments, Capital Expenditures by Segment (Parenthetical) (Detail) - USD ($) $ in Thousands	Jun. 16, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Proceeds from sale of property and equipment		$ 249,787	$ 11,176	$ 17,404
California | Americas Segment
Segment Reporting Information [Line Items]
Proceeds from sale of property and equipment	$ 246,000	$ 246,000

Segments, Property and Equipmen

Segments, Property and Equipment Net by Segment (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total property and equipment, net	$ 1,209,937	$ 1,547,323
Americas Segment
Segment Reporting Information [Line Items]
Total property and equipment, net	1,123,210	1,448,348
Americas Segment | United States
Segment Reporting Information [Line Items]
Total property and equipment, net	1,120,124	1,447,995
Americas Segment | Other Americas
Segment Reporting Information [Line Items]
Total property and equipment, net	3,086	353
Europe Middle East Africa Segment
Segment Reporting Information [Line Items]
Total property and equipment, net	28,360	33,940
Asia Pacific Segment
Segment Reporting Information [Line Items]
Total property and equipment, net	$ 58,367	$ 65,035

Segments, Enterprise Wide Discl

Segments, Enterprise Wide Disclosures Revenues for Groups of Similar Services (Detail) - USD ($) $ in Thousands

3 Months Ended

12 Months Ended

Dec. 31, 2016

[1],[2]

Sep. 30, 2016

[1],[3]

Jun. 30, 2016

[1],[4]

Mar. 31, 2016

[1],[5]

Dec. 31, 2015

[1],[6]

Sep. 30, 2015

[1],[7]

Jun. 30, 2015

[1],[8]

Mar. 31, 2015

[1],[9]

Dec. 31, 2016

Dec. 31, 2015

Dec. 31, 2014

Revenue from External Customer [Line Items]

Total revenue

$ 1,469,140

$ 1,305,206

$ 1,307,637

$ 1,087,152

$ 1,273,393

$ 1,225,673

$ 1,243,265

$ 1,225,970

$ 5,169,135

$ 4,968,301

$ 4,618,133

Search

Revenue from External Customer [Line Items]

Total revenue

[10],[11]

2,673,100

2,113,848

1,831,985

Display

Revenue from External Customer [Line Items]

Total revenue

[10]

1,981,535

2,085,754

1,880,117

Other

Revenue from External Customer [Line Items]

Total revenue

[10]

514,500

768,699

906,031

United States

Revenue from External Customer [Line Items]

Total revenue

[11]

4,048,156

3,865,772

3,380,310

International

Revenue from External Customer [Line Items]

Total revenue

[11]

$ 1,120,979

$ 1,102,529

$ 1,237,823

[1]

Commencing in the second quarter of 2016, TAC payments related to the Microsoft Search Agreement, which previously would have been recorded as a reduction to revenue, began to be recorded as cost of revenue-TAC due to a required change in revenue presentation. See Note 1-"The Company and Summary of Significant Accounting Policies" and Note 19-"Microsoft Search Agreement" in the Notes to the Company's consolidated financial statements for additional information.

[2]

Net income attributable to Yahoo! Inc. for the quarter ended December 31, 2016 includes security incidents costs of $10 million, advisory fees of $6 million and net restructuring charges of $2 million.

[3]

Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2016 includes advisory fees of $27 million, net restructuring charges of $10 million and a loss of $8 million due to the decline in fair value of the Hortonworks warrants.

[4]

Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2016 includes goodwill impairment charge of $395 million and intangible assets impairment charge of $87 million related to Tumblr reporting unit, net restructuring charges of $19 million, advisory fees of $15 million and a gain of $120 million on the sale of land.

[5]

Net loss attributable to Yahoo! Inc. for the quarter ended March 31, 2016 includes net restructuring charges of $57 million, advisory fees of $9 million and a loss of $39 million due to the decline in fair value of the Hortonworks warrants.

[6]

Net loss attributable to Yahoo! Inc. for the quarter ended December 31, 2015 includes goodwill impairment charge of $4.5 billion, asset impairment charge of $2 million related to the originally developed content, intangible assets impairment charge of $15 million, net restructuring charges of $7 million, and advisory fees of $1 million.

[7]

Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2015 includes, a loss of $13 million due to the decline in fair value of the Hortonworks warrants, asset impairment charge of $42 million related to the acquired and originally developed content, and net restructuring charges of $26 million.

[8]

Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2015 includes a gain on sale of patents of $9 million, a gain of $5 million due to the increase in fair value of the Hortonworks warrants, net restructuring charges of $20 million, and advisory fees of $8 million.

[9]

Net income attributable to Yahoo! Inc. for the quarter ended March 31, 2015 includes a gain on sale of patents of $2 million, a loss of $12 million due to the decline in fair value of the Hortonworks warrants, and net restructuring charges of $51 million.

[10]

At the beginning of 2016, the Company reclassified certain amounts from other revenue to either search or display revenue. Prior period amounts have been revised to conform to the current presentation as follows: for the year ended December 31, 2014, the Company reclassified $39.1 million and $12.1 million to search and display revenue, respectively, previously included in other revenue; and for the year ended December 31, 2015, the Company reclassified $29.7 million and $11.6 million to search and display revenue, respectively, previously included in other revenue.

[11]

Commencing in the second quarter of 2016, TAC payments related to the Microsoft Search Agreement, which previously would have been recorded as a reduction to revenue, began to be recorded as cost of revenue-TAC due to a required change in revenue presentation. See Note 1-"The Company and Summary of Significant Accounting Policies" and Note 19-"Microsoft Search Agreement" for additional information.

Segments, Enterprise Wide Di124

Segments, Enterprise Wide Disclosures Revenues for Groups of Similar Services (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Search | Revenue
Revenue from External Customer [Line Items]
Prior period reclassification adjustment	$ 29.7	$ 39.1
Search | Other Revenue
Revenue from External Customer [Line Items]
Prior period reclassification adjustment	(29.7)	(39.1)
Display | Revenue
Revenue from External Customer [Line Items]
Prior period reclassification adjustment	11.6	12.1
Display | Other Revenue
Revenue from External Customer [Line Items]
Prior period reclassification adjustment	$ (11.6)	$ (12.1)

Segments - Additional Informati

Segments - Additional Information (Detail) - Country	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Number of foreign countries accounted for more than 10 percent of Company's revenue	0	0	0

Microsoft Search Agreement - Ad

Microsoft Search Agreement - Additional Information (Detail) - USD ($) $ in Thousands		Apr. 15, 2015	Feb. 23, 2015	Feb. 22, 2015	Feb. 23, 2010	Dec. 04, 2009	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Search Agreement With Microsoft Corporation [Line Items]
Revenue share rate from Microsoft's services under the Microsoft 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 Microsoft search agreement with Microsoft, years					10 years
Cost of revenue - TAC							$ 1,650,786	$ 877,514	$ 217,531
Uncollected Microsoft Search Agreement revenue							392,000	267,000
Term of license of core search technology with Microsoft, years						10 years
Microsoft Search Agreement
Search Agreement With Microsoft Corporation [Line Items]
Cost of revenue - TAC	[1]						812,105	0	0
Reduction to revenue							273,705	$ 1,269,134	$ 1,319,242
Microsoft Search Agreement | Trading Revenue
Search Agreement With Microsoft Corporation [Line Items]
Reduction to revenue							$ 812,000
Customer Concentration Risk | Sales Revenue, Net | Microsoft Search Agreement | Microsoft
Search Agreement With Microsoft Corporation [Line Items]
Concentration risk, percentage							37.00%	35.00%	35.00%
[1]	For the year ended December 31, 2016, cost of revenue-TAC included $701 million in the Americas segment, $106 million in the EMEA segment, and $5 million in the Asia Pacific segment.

Valuation And Qualifying Accoun

Valuation And Qualifying Accounts (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for Doubtful Accounts
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year		$ 57,503	$ 39,799	$ 35,549
Charged to Expenses		14,301	26,793	15,406
Write-Offs Adjustments, Net of Recoveries		(39,267)	(9,089)	(11,156)
Balance at end of Year		32,537	57,503	39,799
Valuation Allowance of Deferred Tax Assets
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year		29,001	23,853	36,690
Charged (Credited) to Expenses		8,369	7,150	(10,427)
Charged (Credited) to Other Accounts	[1]	(1,016)	(2,002)	(2,410)
Balance at end of Year		$ 36,354	$ 29,001	$ 23,853
[1]	Amounts not charged (credited) to expenses are charged (credited) to stockholders' equity, deferred tax assets (liabilities), or goodwill.

Selected Quarterly Financial128

Selected Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2016	[2]	Sep. 30, 2016	[3]	Jun. 30, 2016	[4]	Mar. 31, 2016	[5]	Dec. 31, 2015	[6]	Sep. 30, 2015	[7]	Jun. 30, 2015	[8]	Mar. 31, 2015	[9]	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Selected Quarterly Financial Data [Line Items]
Revenue	$ 1,469,140	[1]	$ 1,305,206	[1]	$ 1,307,637	[1]	$ 1,087,152	[1]	$ 1,273,393	[1]	$ 1,225,673	[1]	$ 1,243,265	[1]	$ 1,225,970	[1]	$ 5,169,135	$ 4,968,301	$ 4,618,133
Total operating expenses	1,404,989		1,357,525		1,797,313		1,254,366		5,803,427		1,311,985		1,288,059		1,313,324		5,814,193	9,716,795	4,475,191
(Loss) Income from operations	64,151		(52,319)		(489,676)		(167,214)		(4,530,034)		(86,312)		(44,794)		(87,354)		(645,058)	(4,748,494)	142,942
Other (expense) income , net	(15,440)		(6,122)		15,062		(47,416)		(9,023)		(23,955)		(11,741)		(31,063)		(53,916)	(75,782)	10,369,439
Benefit (provision)for income taxes	1,492		105,513		(15,543)		34,766		13,985		93,208		(58,495)		40,900		126,228	89,598	(4,038,102)
Earnings in equity interests	113,704		116,228		51,777		81,574		92,845		95,195		95,841		99,690		363,283	383,571	1,057,863
Net income (loss) attributable to Yahoo! Inc.	$ 161,998		$ 162,826		$ (439,913)		$ (99,232)		$ (4,434,987)		$ 76,261		$ (21,554)		$ 21,198		$ (214,321)	$ (4,359,082)	$ 7,521,731
Net income (loss) attributable to Yahoo! Inc. common stockholders per share-basic	$ 0.17		$ 0.17		$ (0.46)		$ (0.10)		$ (4.70)		$ 0.08		$ (0.02)		$ 0.02		$ (0.23)	$ (4.64)	$ 7.61
Net income (loss) attributable to Yahoo! Inc. common stockholders per share-diluted	$ 0.17		$ 0.17		$ (0.46)		$ (0.10)		$ (4.70)		$ 0.08		$ (0.02)		$ 0.02		$ (0.23)	$ (4.64)	$ 7.45
Shares used in per share calculation-basic	953,798		951,421		948,432		945,719		943,425		940,822		937,569		934,748		949,843	939,141	987,819
Shares used in per share calculation-diluted	958,624		957,304		948,432		945,719		943,425		946,934		937,569		947,976		949,843	939,141	1,004,108
[1]	Commencing in the second quarter of 2016, TAC payments related to the Microsoft Search Agreement, which previously would have been recorded as a reduction to revenue, began to be recorded as cost of revenue-TAC due to a required change in revenue presentation. See Note 1-"The Company and Summary of Significant Accounting Policies" and Note 19-"Microsoft Search Agreement" in the Notes to the Company's consolidated financial statements for additional information.
[2]	Net income attributable to Yahoo! Inc. for the quarter ended December 31, 2016 includes security incidents costs of $10 million, advisory fees of $6 million and net restructuring charges of $2 million.
[3]	Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2016 includes advisory fees of $27 million, net restructuring charges of $10 million and a loss of $8 million due to the decline in fair value of the Hortonworks warrants.
[4]	Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2016 includes goodwill impairment charge of $395 million and intangible assets impairment charge of $87 million related to Tumblr reporting unit, net restructuring charges of $19 million, advisory fees of $15 million and a gain of $120 million on the sale of land.
[5]	Net loss attributable to Yahoo! Inc. for the quarter ended March 31, 2016 includes net restructuring charges of $57 million, advisory fees of $9 million and a loss of $39 million due to the decline in fair value of the Hortonworks warrants.
[6]	Net loss attributable to Yahoo! Inc. for the quarter ended December 31, 2015 includes goodwill impairment charge of $4.5 billion, asset impairment charge of $2 million related to the originally developed content, intangible assets impairment charge of $15 million, net restructuring charges of $7 million, and advisory fees of $1 million.
[7]	Net income attributable to Yahoo! Inc. for the quarter ended September 30, 2015 includes, a loss of $13 million due to the decline in fair value of the Hortonworks warrants, asset impairment charge of $42 million related to the acquired and originally developed content, and net restructuring charges of $26 million.
[8]	Net loss attributable to Yahoo! Inc. for the quarter ended June 30, 2015 includes a gain on sale of patents of $9 million, a gain of $5 million due to the increase in fair value of the Hortonworks warrants, net restructuring charges of $20 million, and advisory fees of $8 million.
[9]	Net income attributable to Yahoo! Inc. for the quarter ended March 31, 2015 includes a gain on sale of patents of $2 million, a loss of $12 million due to the decline in fair value of the Hortonworks warrants, and net restructuring charges of $51 million.

Selected Quarterly Financial129

Selected Quarterly Financial Data (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Selected Quarterly Financial Data [Line Items]
Gain on sale of patents							$ 9,000	$ 2,000
Restructuring charges (reversals)	$ 2,000	$ 10,000	$ 19,000	$ 57,000	$ 7,000	$ 26,000	20,000	51,000	$ 88,629	$ 104,019	$ 103,450
Advisory fees	6,000	27,000	15,000	9,000	1,000		8,000
Asset impairment charge					2,000				0	44,381	0
Goodwill impairment charge					4,460,837				394,901	4,460,837	88,414
Intangible assets, impairment charge					$ 15,000
Gain on disposition of property plant equipment			120,000						$ 121,559	11,100	$ 97,894
Security incidents costs	$ 10,000
Tumblr
Selected Quarterly Financial Data [Line Items]
Asset impairment charge			87,000
Goodwill impairment charge			$ 395,000							$ 230,000
Acquired and Originally Developed Content
Selected Quarterly Financial Data [Line Items]
Asset impairment charge						42,000
Hortonworks, Inc
Selected Quarterly Financial Data [Line Items]
Gain (loss) in fair value of warrants		$ (8,000)		$ (39,000)		$ (13,000)	$ 5,000	$ (12,000)