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Earnings (Loss) Per Share (Details) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Reconciliation of basic earnings (loss) per share to diluted earnings (loss) per share    
Net Loss (Basic and Diluted)$ (115)$ (100)$ (290)$ (284)
Shares, Basic105,304,781100,108,673103,592,89999,671,209
Shares, Diluted105,304,781100,108,673103,592,89999,671,209
Weighted Average Per-Share Amount, Basic$ (1.09)$ (1.00)$ (2.80)$ (2.85)
Weighted Average Per-Share Amount, Diluted$ (1.09)$ (1.00)$ (2.80)$ (2.85)
Earnings Loss Per Share (Textual) [Abstract]    
Potential conversion of convertible senior notes$ 400 $ 400 
Interest rate of convertible senior notes10.00% 10.00% 
Shares issuable upon conversion of 10% convertible senior notes not included in the computation of diluted loss per share35,100,00035,100,00035,100,00035,100,000
Shares not included in the computation of diluted loss per share4,900,0006,500,0003,400,0006,700,000
Initial conversion price of 10% convertible senior notes not included in the computation of diluted loss per share$ 11.40 $ 11.40