Consolidated Statements Of Equity (Deficit) (USD $) In Millions, except Share data	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss		Non- controlling Interests
Balance at Dec. 31, 2011	$ (1,499)	$ 0	$ 2,033	$ (3,502)	$ (32)		$ 2
Balance (in shares) at at Dec. 31, 2011		8,000,000
Net income (loss)	(540)			(543)			3
Other comprehensive income	1				1	[1]
Issuance of common stock (in shares)		46,000,000
Issuance of common stock in conjunction with the initial public offering	1,176		1,176
Issuance of common stock for Convertible Notes conversion (in shares)		81,000,000
Issuance of common stock for Convertible Notes conversion	2,110	1	2,109
Issuance of common stock pursuant to letter agreements with certain holders of Convertible Notes (in shares)		9,700,000
Issuance of common stock pursuant to letter agreements with certain holders of Convertible Notes	256		256
Stock-based compensation (in shares)		600,000
Stock-based compensation	17		17
Dividends	(2)						(2)
Balance at Dec. 31, 2012	1,519	1	5,591	(4,045)	(31)		3
Balance (in shares) at at Dec. 31, 2012		145,300,000
Net income (loss)	443			438			5
Other comprehensive income	12				12	[1]
Exercise of stock options (in shares)		200,000
Exercise of stock options	5		5
Stock-based compensation	19		19
Issuance of common stock (in shares)		900,000
Issuance of shares under the Phantom Value Plan	42		42
Issuance of shares for vesting of restricted stock awards, net of forfeitures		100,000
Shares withheld for taxes on equity awards (in shares)		(400,000)
Shares withheld for taxes on equity awards	(22)		(22)
Dividends	(5)						(5)
Balance at Dec. 31, 2013	2,013	1	5,635	(3,607)	(19)		3
Balance (in shares) at at Dec. 31, 2013	146,125,337	146,100,000
Net income (loss)	147			143			4
Other comprehensive income	(16)				(16)	[1]
Exercise of stock options (in shares)		300,000
Exercise of stock options	6		6
Stock-based compensation	42		42
Issuance of shares for vesting of restricted stock awards, net of forfeitures		100,000
Shares withheld for taxes on equity awards (in shares)		(100,000)
Shares withheld for taxes on equity awards	(6)		(6)
Dividends	(4)						(4)
Noncontrolling Interest, Increase from Business Combination	1
Balance at Dec. 31, 2014	$ 2,183	$ 1	$ 5,677	$ (3,464)	$ (35)		$ 4
Balance (in shares) at at Dec. 31, 2014	146,382,923	146,400,000

[1] As of December 31, 2014, the Company does not have any after-tax components of accumulated other comprehensive loss attributable to noncontrolling interests.