XML 70 R23.htm IDEA: XBRL DOCUMENT

Common Stock	3 Months Ended
Common Stock	Mar. 31, 2012
Common Stock [Abstract]
Common Stock	Common Stock At March 31, 2012, 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 first quarter of 2012 and 2011.