Earnings (Loss) Per Share (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Reconciliation of basic earnings (loss) per share to diluted earnings (loss) per share
Net Loss (Basic and Diluted)	$ (70)	$ (74)	$ (175)	$ (184)
Shares, Basic	103,550,643	99,519,512	103,286,025	99,452,477
Shares, Diluted	103,550,643	99,519,512	103,286,025	99,452,477
Weighted Average Per-Share Amount, Basic	$ (0.69)	$ (0.74)	$ (1.70)	$ (1.85)
Weighted Average Per-Share Amount, Diluted	$ (0.69)	$ (0.74)	$ (1.70)	$ (1.85)
Earnings (Loss) Per Share (Textuals)
Potential conversion of convertible senior notes	$ 400		$ 400
Interest rate of convertible senior notes	10.00%		10.00%
Shares issuable upon conversion of 10% convertible senior notes not included in the computation of diluted loss per share	35,100,000	35,100,000	35,100,000	35,100,000
Shares not included in the computation of diluted loss per share	7,100,000	6,500,000	7,200,000	6,800,000
Initial conversion price of 10% convertible senior notes not included in the computation of diluted loss per share	$ 11.40		$ 11.40