v2.4.0.6
Stock-Based Compensation (Details) (USD $)
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value $ 1,000,000 $ 6,000,000
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) 4.8  
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 879,527  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price $ 15.31  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period 7,300  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price $ 16.90  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period 34,604  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price $ 12.10  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period 44,200  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price $ 17.69  
Options Outstanding, Ending balance, Number 18,459,325  
Options Outstanding, Ending balance, Weighted Average Exercise Price $ 17.23  
Options Ouststanding, Ending balance, Weighted Average Remaining Term (in years) 4.8  
Options Outstanding, Ending balance, Aggregate Intrinsic Value (in $ millions) 35,000,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number 8,262,451  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price $ 19.48  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term 4.3  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value 3,000,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number 17,987,325  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price $ 17.31  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term 4.7  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value 33,000,000  
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 6.5 [1] 6.5 [1]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 1.60% 3.20%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 30.00% 31.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 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 $ 5.48
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 1,504,473  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 15.31  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period 45,058  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period, Weighted Average Grant Date Fair Value $ 12.82  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period 72,484  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value $ 13.75  
Nonvested Restricted Stock, Ending balance, Number 4,897,289  
Nonvested Restricted Stock, Ending balance, Weighted Average Grant Date Fair Value $ 13.06  
Disclosure of Compensation Related Costs Share-based Payments (Textuals) [Abstract]    
Vesting period for graded and cliff vesting options - minimum 1  
Vesting period for graded and cliff vesting options - maximum 5  
Share-based Compensation Arrangement by Share-based Payment Award, Award Expiration Minimum Range 5  
Share-based Compensation Arrangement by Share-based Payment Award, Award Expiration Maximum Range 10  
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  
Vest Term of the Second Sub-Grant 2  
Vest Term of the Third Sub-Grant 3  
Grants in Option Grants with Three Year Cliff Vesting 1  
Vesting term of option grants with three year cliff vesting 3  
Allocated Share-based Compensation Expense 6,000,000 5,000,000
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 12,000,000  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 1.2  
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 29,000,000  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 1.6  
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 0.1  
[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.