CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total		Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Earnings	Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2010	$ 1,813,336		$ 438	$ (640,415)	$ 2,417,092	$ 69,110	$ (32,889)
Balance (in shares) at Dec. 31, 2010			(56,567,000)	(7,421,000)
Increase (Decrease) in Stockholders' Equity
Net income applicable to common stockholders	1,056,371					1,056,371
Unrealized gain (loss) on marketable securities, net of tax benefit of $43 in 2013, tax benefit of $158 in 2012 and tax of $96 in 2011	212	[1]					212
Currency translation adjustments, net of tax benefit of $55,001 and $18,001 in 2013 and 2012, respectively, and tax of $21,547 in 2011	(54,905)						(54,905)
Redeemable noncontrolling interests fair value adjustment	(91,743)				0	(91,743)
Reclassification adjustment for convertible debt in mezzanine	(77,342)				(77,342)
Exercise of stock options and vesting of restricted stock units and/or performance share units	4,302		8		4,294
Exercise of stock options and vesting of restricted stock units and performance share units (in shares)			1,007,000
Repurchase of common stock	(163,171)			(163,171)
Repurchase of common stock (in shares)				(359,000)
Stock-based compensation and other stock based payments	66,194				66,194
Issuance of senior convertible notes	0				0
Conversion of debt	0		0		0
Conversion of debt (in shares)			5,000
Excess tax benefit from stock-based compensation	21,041				21,041
Balance at Dec. 31, 2011	2,574,295		446	(803,586)	2,431,279	1,033,738	(87,582)
Balance (in shares) at Dec. 31, 2011			(57,579,000)	(7,780,000)
Increase (Decrease) in Stockholders' Equity
Net income applicable to common stockholders	1,419,566					1,419,566
Unrealized gain (loss) on marketable securities, net of tax benefit of $43 in 2013, tax benefit of $158 in 2012 and tax of $96 in 2011	(620)	[1]					(620)
Currency translation adjustments, net of tax benefit of $55,001 and $18,001 in 2013 and 2012, respectively, and tax of $21,547 in 2011	64,526						64,526
Redeemable noncontrolling interests fair value adjustment	(84,693)					(84,693)
Reclassification adjustment for convertible debt in mezzanine	(22,705)				(22,705)
Exercise of stock options and vesting of restricted stock units and/or performance share units	2,683		4		2,679
Exercise of stock options and vesting of restricted stock units and performance share units (in shares)			477,000
Repurchase of common stock	(257,021)			(257,021)
Repurchase of common stock (in shares)				(405,000)
Stock-based compensation and other stock based payments	72,035				72,035
Issuance of senior convertible notes	78,310				78,310
Conversion of debt	0
Excess tax benefit from stock-based compensation	5,189				5,189
Balance at Dec. 31, 2012	3,896,975		450	(1,060,607)	2,612,197	2,368,611	(23,676)
Balance (in shares) at Dec. 31, 2012			(58,056,000)	(8,185,000)
Increase (Decrease) in Stockholders' Equity
Net income applicable to common stockholders	1,892,663					1,892,663
Unrealized gain (loss) on marketable securities, net of tax benefit of $43 in 2013, tax benefit of $158 in 2012 and tax of $96 in 2011	21	[1]					21
Currency translation adjustments, net of tax benefit of $55,001 and $18,001 in 2013 and 2012, respectively, and tax of $21,547 in 2011	108,384						108,384
Redeemable noncontrolling interests fair value adjustment	(42,522)					(42,522)
Reclassification adjustment for convertible debt in mezzanine	(46,122)				(46,122)
Exercise of stock options and vesting of restricted stock units and/or performance share units	91,607		6		91,601
Exercise of stock options and vesting of restricted stock units and performance share units (in shares)			715,000
Repurchase of common stock	(883,515)			(883,515)
Repurchase of common stock (in shares)				(1,030,000)
Stock-based compensation and other stock based payments	142,098				142,098
Issuance of senior convertible notes	93,402				93,402
Stock issued during period, shares, acquisitions			1,522,000
Stock issued during period, value, acquisitions	1,281,134		12		1,281,122
Adjustments to Additional Paid in Capital, Other	264,423				264,423
Conversion of debt	1,232		8		1,224
Conversion of debt (in shares)			972,000
Settlement of conversion spread hedges, shares				(42,000)
Settlement of conversion spread hedges, value	19			(43,085)	43,104
Excess tax benefit from stock-based compensation	17,686				17,686
Balance at Dec. 31, 2013	$ 6,909,729		$ 476	$ (1,987,207)	$ 4,592,979	$ 4,218,752	$ 84,729
Balance (in shares) at Dec. 31, 2013			(61,265,000)	(9,257,000)

[1] Net of tax benefits of $43 and $158 for the years ended December 31, 2013 and 2012, respectively, and tax of $96 for the year ended December 31, 2011