Common Stock	12 Months Ended
Dec. 31, 2011
Class of Stock Disclosures [Abstract]
Common Stock	Common Stock During 2011, the Company repurchased approximately 12.3 million shares of its common stock for total consideration of approximately $361 million, at an average price per share of $29.44. The repurchased shares were reflected as an increase in treasury shares (a decrease in shares outstanding). During the third quarter of 2011, the Company received authorization to increase the share repurchase program to $1 billion from $500 million. The Company remains authorized to repurchase additional shares of its common stock up to a value of $553 million. There is no time limit on this authorization. The Company did not repurchase any shares in the fourth quarter of 2011.

Common Stock

During 2011, the Company repurchased approximately 12.3 million shares of its common stock for total consideration of approximately $361 million, at an average price per share of $29.44. The repurchased shares were reflected as an increase in treasury shares (a decrease in shares outstanding). During the third quarter of 2011, the Company received authorization to increase the share repurchase program to $1 billion from $500 million. The Company remains authorized to repurchase additional shares of its common stock up to a value of $553 million. There is no time limit on this authorization. The Company did not repurchase any shares in the fourth quarter of 2011.