Consolidated Statement of Stockholders' Equity (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Accumulated Other Comprehensive Income (Loss)	Additional Paid-in Capital	Treasury Stock	Accumulated Deficit	Convertible Perpetual Preferred Stock, Series B-1
Beginning balance at Dec. 31, 2012	$ 4,039,565	$ 5,263	$ 120	$ 10,345,566	$ 0	$ (6,311,390)	$ 6
Beginning balance (in shares) at Dec. 31, 2012		5,262,440,085			0		6,250,100
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income, net of tax	248,843		(281)			249,124
Share-based payment expense	30,012			30,012
Exercise of options and vesting of restricted stock units	19,118	16		19,102
Exercise of stock options and vesting of restricted stock units (in shares)		16,153,122
Conversion of preferred stock to common stock	0	1,293		(1,287)			(6)
Conversion of preferred stock to common stock (in shares)		1,293,509,076					6,250,100
Conversion of Exchangeable Notes to common stock	45,097	28		45,069
Conversion of Exchangeable Notes to common stock (in shares)		27,687,850
Common stock repurchased	(1,143,789)				(1,143,789)
Common stock repurchased (in shares)					352,568,635
Common stock retired	0	(342)		(1,108,274)	1,108,616
Common stock retired (in shares)		(342,068,635)			(342,068,635)
Ending balance at Jun. 30, 2013	$ 3,238,846	$ 6,258	$ (161)	$ 9,330,188	$ (35,173)	$ (6,062,266)	$ 0
Beginning balance (in shares) at Jun. 30, 2013		6,257,721,498			10,500,000		0