v2.4.0.6
Stock-Based Compensation (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value $ 1,000,000 $ 0 $ 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value 20,000,000 7,000,000 4,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Options Outstanding, Beginning balance, Number 17,665,902    
Options Outstanding, Beginning balance, Weighted Average Exercise Price $ 17.32    
Options Ouststanding, Beginning balance, Weighted Average Remaining Term (in years) 4 years 0 months 0 days 4 years 9 months 18 days  
Options Outstanding, Beginning balance, Aggregate Intrinsic Value (in $ millions) 26,000,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 898,115    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price $ 15.35    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period 348,500    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price $ 14.94    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period 187,716    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price $ 13.42    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period 165,300    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price $ 17.77    
Options Outstanding, Ending balance, Number 17,862,501 17,665,902  
Options Outstanding, Ending balance, Weighted Average Exercise Price $ 17.30 $ 17.32  
Options Ouststanding, Ending balance, Weighted Average Remaining Term (in years) 4 years 0 months 0 days 4 years 9 months 18 days  
Options Outstanding, Ending balance, Aggregate Intrinsic Value (in $ millions) 42,000,000 26,000,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number 10,251,149    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price $ 19.16    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term 3 years 7 months 6 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value 12,000,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number 17,588,775    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price $ 17.34    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term 3 years 10 months 24 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value 41,000,000    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 6 years 6 months 0 days [1] 6 years 6 months 0 days  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 0.00% [2] 0.00% [2] 0.00% [2]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 5.18 $ 5.49 $ 1.98
Restricted Stock and Stock Unit Activity [Abstract]      
Nonvested Restricted Stock, Beginning balance, Number 3,510,358    
Nonvested Restricted Stock, Beginning balance, Weighted Average Grant Date Fair Value $ 12.10    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 1,991,894    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 15.97    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period 297,166    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period, Weighted Average Grant Date Fair Value $ 13.70    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period 1,071,049    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value $ 10.17    
Nonvested Restricted Stock, Ending balance, Number 4,134,037 3,510,358  
Nonvested Restricted Stock, Ending balance, Weighted Average Grant Date Fair Value $ 14.33 $ 12.10  
Disclosure of Compensation Related Costs Share-based Payments (Textuals) [Abstract]      
Vesting period for graded and cliff vesting options - minimum 1 year    
Vesting period for graded and cliff vesting options - maximum 5 years    
Share-based Compensation Arrangement by Share-based Payment Award, Award Expiration Minimum Range 5 years    
Share-based Compensation Arrangement by Share-based Payment Award, Award Expiration Maximum Range 10 years    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized for Directors 567,000    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized for Employees 27,533,000    
Vest Term of First Sub Grant 1 year    
Vest Term of the Second Sub-Grant 2 years    
Vest Term of the Third Sub-Grant 3 years    
Grants in Option Grants with Three Year Cliff Vesting 1    
Vesting term of option grants with three year cliff vesting 3 years    
Stock-based compensation expense 25,000,000 24,000,000 24,000,000
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options 5,000,000 0 0
Minimum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term     4 years 0 months 0 days
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 1.20% 1.70% 1.30%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 27.00% 31.20% 31.40%
Maximum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term     6 years 6 months 0 days
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 1.60% 3.20% 3.30%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 30.50% 44.90% 37.60%
Stock Options [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]      
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized 6,000,000    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 0 years 9 months 18 days    
Restricted Stock [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]      
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized 25,000,000    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 1 year 3 months 18 days    
Restricted Stock Units (RSUs) [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]      
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized $ 0    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 0 years 4 months 24 days    
[1] Expected term calculated using the simplified method prescribed by the SEC due to the lack of sufficient historical exercise data to provide a reasonable basis to estimate the expected term.
[2] We have never paid cash dividends on our common stock, and it is not anticipated that any cash dividends will be paid on our common stock in the near future