Consolidated Statements of Stockholders' Equity (USD $) In Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury stock	Retained earnings	Accumulated other comprehensive income
Balance, beginning of year at Dec. 31, 2010		$ 1,306	$ 10,109,913		$ 1,942,656	$ 504,254
Balance, beginning of year at Dec. 31, 2010	1,308,836
Common stock and stock-based awards issued			156,211
Repurchases of common stock				(1,618,741)
Net change in unrealized gains (losses) on available-for-sale securities, net of tax	(16,272)					(16,272)
Common stock issued		18
Net income attributable to Yahoo! Inc.	1,048,827				1,048,827
Stock-based compensation expense			226,270
Common stock retired		(82)
Tax benefits (detriments) from stock-based awards			33,497
Foreign currency translation adjustments, net of tax	209,887					209,887
Tax withholdings related to net share settlements of restricted stock awards			(44,593)	(168)
Retirement of treasury stock			(643,401)	1,202,672	(559,189)
Other			(11,998)
Common stock and restricted stock issued	18,371
Repurchases of common stock	(109,716)
Tax withholdings related to net share settlements of restricted stock awards	(10)
Balance, end of year at Dec. 31, 2011	12,541,067	1,242	9,825,899	(416,237)	2,432,294	697,869
Balance, end of year at Dec. 31, 2011	1,217,481
Common stock and stock-based awards issued			218,349
Repurchases of common stock				(2,167,841)
Net change in unrealized gains (losses) on available-for-sale securities, net of tax	16,659					16,659
Common stock issued		24
Net income attributable to Yahoo! Inc.	3,945,479				3,945,479
Stock-based compensation expense			244,653
Common stock retired		(79)
Tax benefits (detriments) from stock-based awards			(31,440)
Foreign currency translation adjustments, net of tax	(143,279)					(143,279)
Tax withholdings related to net share settlements of restricted stock awards			(60,939)
Retirement of treasury stock			(630,639)	1,216,035	(585,314)
Other			(2,535)
Common stock and restricted stock issued	23,773
Repurchases of common stock	(126,021)
Balance, end of year at Dec. 31, 2012	14,560,200	1,187	9,563,348	(1,368,043)	5,792,459	571,249
Balance, end of year at Dec. 31, 2012	1,115,233
Common stock and stock-based awards issued			353,241
Repurchases of common stock				(3,344,396)
Net change in unrealized gains (losses) on available-for-sale securities, net of tax	5,980					5,980
Common stock issued		26
Net income attributable to Yahoo! Inc.	1,366,281				1,366,281
Stock-based compensation expense			294,408
Net change in unrealized gains on cash flow hedges, net of tax	1,412					1,412
Common stock retired		(198)
Tax benefits (detriments) from stock-based awards			49,061
Foreign currency translation adjustments, net of tax	(260,252)					(260,252)
Tax withholdings related to net share settlements of restricted stock awards			(139,815)
Retirement of treasury stock			(1,620,704)	4,512,211	(2,891,311)
Equity component of convertible senior notes, net			268,084
Purchase of note hedges			(205,706)
Issuance of warrants			124,775
Other			1,612
Common stock and restricted stock issued	26,401
Restricted stock issued under compensation arrangements	1,567
Repurchases of common stock	(128,863)
Balance, end of year at Dec. 31, 2013	$ 13,074,909	$ 1,015	$ 8,688,304	$ (200,228)	$ 4,267,429	$ 318,389
Balance, end of year at Dec. 31, 2013	1,014,338