v2.4.0.6
Stock-Based Compensation Narrative (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
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
Cash Received from Exercise of Stock Options     4,000,000 0
Fair Value of Restricted Stock That Vested     19,000,000 7,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]        
Expected Term     6 years 6 months [1] 6 years 6 months [1]
Expected Dividend Rate     0.00% [2] 0.00% [2]
Weighted Average Grant Date Fair Value     $ 5.18 $ 5.49
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]        
Nonvested Restricted Stock, Beginning balance     3,510,358  
Nonvested Restricted Stock, Beginning balance, Weighted Average Grant Date Fair Value     $ 12.10  
Grants in Period     1,557,214  
Grants in Period, Weighted Average Grant Date Fair Value     $ 15.38  
Forfeitures in Period     207,798  
Forfeitures in Period, Weighted Average Grant Date Fair Value     $ 13.61  
Vested in Period     1,052,157  
Vested in Period, Weighted Average Grant Date Fair Value     $ 10.10  
Nonvested Restricted Stock, Ending balance 3,807,617   3,807,617  
Nonvested Restricted Stock, Ending balance, Weighted Average Grant Date Fair Value $ 13.89   $ 13.89  
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   567,000  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized for Employees 27,533,000   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 6,000,000 6,000,000 19,000,000 18,000,000
Minimum [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]        
Risk Free Interest Rate     1.20% [3] 1.70% [3]
Expected Volatility Rate     27.00% [4] 31.20% [4]
Maximum [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]        
Risk Free Interest Rate     1.60% [3] 3.20% [3]
Expected Volatility Rate     30.50% [4] 44.90% [4]
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 8,000,000   8,000,000  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition     1 year  
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 21,000,000   21,000,000  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition     1 year 4 months 24 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   $ 0  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition     7 months 6 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.
[3] Zero Coupon U.S. Treasury rate or equivalent based on expected term.
[4] Volatility calculated using the implied volatility of our exchange traded stock options.