Consolidated Statement of Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Stockholders' equity, beginning of period at Dec. 31, 2008		$ 1,470	$ 9,585,853	$ (5,376,970)	$ 5,970,020	$ 903,485
Common stock, beginning of year at Dec. 31, 2008		1,282,025
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		16
Common stock and stock-based awards issued and assumed			67,934
Stock-based compensation			394,807
Stock-based awards tax benefit			(64,136)
Structured stock repurchases			0
Noncontrolling interests			1,741
Repurchase of common stock				(288)
Net income	2,389,097				2,389,097
Change in unrealized gains on investments	288,880					288,880
Change in unrealized gains (losses) on cash flow hedges	(45,173)					(45,173)
Foreign currency translation adjustment	(217,724)					(217,724)
Tax benefit (provision) on above items	(111,364)					(111,364)
Common stock issued		15,825
Common stock repurchased/forfeited		51
Stockholders' equity, end of period at Dec. 31, 2009	13,787,648	1,486	9,986,199	(5,377,258)	8,359,117	818,104
Common stock, end of period at Dec. 31, 2009		1,297,799
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		27
Common stock and stock-based awards issued and assumed			124,071
Stock-based compensation			381,492
Stock-based awards tax benefit			(13,581)
Structured stock repurchases			2,260
Noncontrolling interests			268
Repurchase of common stock				(714,177)
Net income	1,800,961				1,800,961
Change in unrealized gains on investments	117,427					117,427
Change in unrealized gains (losses) on cash flow hedges	18,381					18,381
Foreign currency translation adjustment	(175,605)					(175,605)
Tax benefit (provision) on above items	(26,993)					(26,993)
Common stock issued		26,742
Common stock repurchased/forfeited		26,831
Stockholders' equity, end of period at Dec. 31, 2010	15,302,179	1,513	10,480,709	(6,091,435)	10,160,078	751,314
Common stock, end of period at Dec. 31, 2010	1,297,710	1,297,710
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		22
Common stock and stock-based awards issued and assumed			130,349
Stock-based compensation			457,188
Stock-based awards tax benefit			44,044
Structured stock repurchases			0
Noncontrolling interests			32,542
Repurchase of common stock				(1,063,986)
Net income	3,229,387				3,229,387
Change in unrealized gains on investments	56,804					56,804
Change in unrealized gains (losses) on cash flow hedges	58,289					58,289
Foreign currency translation adjustment	(280,930)					(280,930)
Tax benefit (provision) on above items	(36,009)					(36,009)
Common stock issued		22,394
Common stock repurchased/forfeited		33,617
Stockholders' equity, end of period at Dec. 31, 2011	$ 17,929,879	$ 1,535	$ 11,144,832	$ (7,155,421)	$ 13,389,465	$ 549,468
Common stock, end of period at Dec. 31, 2011	1,286,487	1,286,487