UNAUDITED CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY - 9 months ended Sep. 30, 2015 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Earnings	Accumulated Other Comprehensive Loss
Balance at Dec. 31, 2014	$ 8,566,694	$ 480	$ (2,737,585)	$ 4,923,196	$ 6,640,505	$ (259,902)
Balance (in shares) at Dec. 31, 2014		61,821	(9,888)
Increase (Decrease) in Stockholders' Equity
Net income applicable to common stockholders	2,047,091				2,047,091
Foreign currency translation adjustments, net of tax of $41,930	(78,071)					(78,071)
Unrealized gain on marketable securities, net of tax benefit of $3,804	152,508					152,508
Reclassification adjustment for convertible debt in mezzanine	329			329
Exercise of stock options and vesting of restricted stock units and performance share units	19,139	$ 2		19,137
Exercise of stock options and vesting of restricted stock units and/or performance share units (in shares)		206
Repurchase of common stock	(2,335,815)		$ (2,335,815)
Repurchase of common stock (in shares)			(1,960)
Stock-based compensation and other stock-based payments	174,068			174,068
Conversion of debt	(110,105)	$ 0		(110,105)
Conversion of debt (in shares)		0
Excess tax benefits on stock-based awards	90,935			90,935
Balance (in shares) at Sep. 30, 2015		62,027	(11,848)
Balance at Sep. 30, 2015	$ 8,526,773	$ 482	$ (5,073,400)	$ 5,097,560	$ 8,687,596	$ (185,465)