| Other Stock-based Compensation | |||||||||||
| Weighted | |||||||||||
| Weighted | average | Aggregate | |||||||||
| average | remaining | intrinsic | |||||||||
| Shares | grant date | contractual | value | ||||||||
| (In thousands) | fair value | term (In years) | (In millions) | ||||||||
| RSUs outstanding at January 1, 2013 | 14,878 | $ | 22.45 | ||||||||
| Granted | 3,951 | 24.54 | |||||||||
| Vested | (4,583) | 24.35 | |||||||||
| Forfeited | (674) | 21.25 | |||||||||
| RSUs outstanding at December 31, 2013 | 13,572 | $ | 22.58 | 2.8 | $ | 380 | |||||
| RSUs expected to vest | 12,352 | $ | 22.32 | 2.7 | $ | 346 | |||||