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Unaudited Quarterly Financial Data (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2008
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Selected Quarterly Financial Information [Abstract]                        
Revenue $ 1,579 $ 927 $ 913 $ 914 $ 904 $ 895 $ 892 $ 900   $ 4,333 $ 3,591 $ 3,695
Gross Margin 919 585 566 557 552 542 534 529        
Operating Income (Loss) 45 7 3 (3) (5) (18) (27) (38)   52 (88) (56)
Net Loss (164) (208) (180) (204) (55) (164) (168) (236)   (756) (622) (618)
Loss per share (Basic and Diluted) (in dollars per share) $ (0.80) $ (1.76) $ (1.58) $ (1.82) $ (0.49) $ (1.48) $ (1.52) $ (2.15)   $ (5.51) [1] $ (5.62) $ (5.68) [1]
Depreciation expense                   706 775 814
Losses on early extinguishment of debt (27) (30) (23) (20)     4 55   100 59 (14)
Restructuring Charges                 12 11 2 9
Impairment of Intangible Assets (Excluding Goodwill) 20                      
Tax benefit primarily as a result of releasing valuation allowances                   2 (92) 0
Deferred Tax Assets, Operating Loss Carryforwards, Foreign
                        
Selected Quarterly Financial Information [Abstract]                        
Tax benefit primarily as a result of releasing valuation allowances         93              
Service Life
                        
Selected Quarterly Financial Information [Abstract]                        
Net Loss                   74    
Loss per share (Basic and Diluted) (in dollars per share)                   $ 0.54    
Depreciation expense (74)                 (74)    
Convertible Senior Notes due 2013 (15.0%)
                        
Selected Quarterly Financial Information [Abstract]                        
Debt instrument, stated interest rate (as a percent) 15.00%                 15.00%    
Debt Instrument, Interest Rate, Stated Percentage 15.00%                 15.00%    
Convertible Senior Notes due 2012 (3.5%)
                        
Selected Quarterly Financial Information [Abstract]                        
Losses on early extinguishment of debt       12                
Debt instrument, stated interest rate (as a percent) 3.50%                 3.50%    
Debt Instrument, Interest Rate, Stated Percentage 3.50%                 3.50%    
Senior Notes due 2014 (9.25%)
                        
Selected Quarterly Financial Information [Abstract]                        
Losses on early extinguishment of debt     23                  
Debt instrument, stated interest rate (as a percent) 9.25%                 9.25%    
Debt Instrument, Interest Rate, Stated Percentage 9.25%                 9.25%    
Convertible Senior Notes due 2011 (5.25%)
                        
Selected Quarterly Financial Information [Abstract]                        
Debt instrument, stated interest rate (as a percent) 5.25%     5.25%       5.25%   5.25%    
Debt Instrument, Interest Rate, Stated Percentage 5.25%     5.25%       5.25%   5.25%    
Convertible Senior Discount Notes due 2013 (9.0%)
                        
Selected Quarterly Financial Information [Abstract]                        
Debt instrument, stated interest rate (as a percent) 9.00%     9.00%           9.00%    
Debt Instrument, Interest Rate, Stated Percentage 9.00%     9.00%           9.00%    
10% Convertible Senior Notes due 2011
                        
Selected Quarterly Financial Information [Abstract]                        
Losses on early extinguishment of debt             $ 4          
Debt instrument, stated interest rate (as a percent)             10.00%          
Debt Instrument, Interest Rate, Stated Percentage             10.00%          
Convertible notes | Convertible Senior Notes due 2013 (15.0%)
                        
Selected Quarterly Financial Information [Abstract]                        
Debt instrument, stated interest rate (as a percent) 15.00%                 15.00%    
Debt Instrument, Interest Rate, Stated Percentage 15.00%                 15.00%    
Convertible notes | Convertible Senior Notes due 2012 (3.5%)
                        
Selected Quarterly Financial Information [Abstract]                        
Debt instrument, stated interest rate (as a percent) 3.50%                 3.50%    
Debt Instrument, Interest Rate, Stated Percentage 3.50%                 3.50%    
Convertible notes | Convertible Senior Notes due 2011 (5.25%)
                        
Selected Quarterly Financial Information [Abstract]                        
Debt instrument, stated interest rate (as a percent) 5.25%                 5.25%    
Debt Instrument, Interest Rate, Stated Percentage 5.25%                 5.25%    
Convertible notes | Convertible Senior Discount Notes due 2013 (9.0%)
                        
Selected Quarterly Financial Information [Abstract]                        
Debt instrument, stated interest rate (as a percent) 9.00%                 9.00%    
Debt Instrument, Interest Rate, Stated Percentage 9.00%                 9.00%    
Senior Notes | Senior Notes due 2014 (9.25%)
                        
Selected Quarterly Financial Information [Abstract]                        
Debt instrument, stated interest rate (as a percent) 9.25%                 9.25%    
Debt Instrument, Interest Rate, Stated Percentage 9.25%                 9.25%    
[1] Adjusted to give effect to the 1 for 15 reverse stock split that became effective on October 19, 2011. See Note 1 - Organization and Summary of Significant Accounting Policies.