Stock Repurchase Programs (Tables)

12 Months Ended

Dec. 31, 2013

Stock Repurchase Programs [Abstract]

Summary of stock repurchase activity under stock repurchase program

The stock repurchase activity under the 2012 stock repurchase program during 2013 is summarized as follows:

	Shares Repurchased	Average Price per Share (1)		Value of Shares Repurchased		Remaining Amount Authorized
	(In millions, except per share amounts)
Balance at January 1, 2013	—	$	51.89	$	17	$	1,983
Repurchase of common stock	25	54.33		1,343		(1,343		)
Balance at December 31, 2013	25	$	54.30	$	1,360	$	640

(1) Stock repurchase activity excludes broker commissions.