Share-Based Compensation Level 4 (Details)
| 9 Months Ended |
|---|
Sep. 30, 2011 |
|---|
Stock Options [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Dividend yield | 2.40% |
| Expected volatility | 38.40% |
| Risk-free interest rate | 2.40% |
| Expected holding period | 5.0 |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] | |
| Options outstanding at beggining of period | 12,312,783 |
| Options outstanding at beginning of period, weighted average exercise price | 7.53 |
| Granted | 2,394,430 |
| Granted, Weighted Average Exercise Price | 9.09 |
| Exercised | 1,136,808 |
| Exercised, Weighted Average Exercise Price | 6.77 |
| Cancelled | (94,857) |
| Cancelled, Weighted Average Exercise Price | 5.32 |
| Options outstanding at end of period | 13,475,548 |
| Options outstanding at end of period, weighted average exercise price | 7.88 |
| Options exercisable at September 30, 2011 | 8,288,301 |
| Options exercisable at September 30, 2011, Weighted Average Exercise Price | 8.16 |
Restricted Stock [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] | |
| Nonvested restricted shares at beginning of period | 1,167,273 |
| Nonvested restricted shares at beginning of period, weighted average grant date fair value | 6.35 |
| Granted | 538,620 |
| Granted, Weighted Average Grant Date Fair Value | 9.13 |
| Vested | (540,723) |
| Vested, Weighted Average Grant Date Fair Value | 6.58 |
| Nonvested restricted shares at end of period | 1,165,170 |
| Nonvested restricted shares at end of period, weighted average grant date fair value | 7.53 |