Shareholders' Equity (Summary of Shares Outstanding) (Detail) - shares		12 Months Ended
	Jan. 28, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)		(271,964,566)	(277,292,764)	(307,132,594)
Treasury Stock, Shares, Acquired	(21,650,454)
Purchases (in shares)		(6,992,772)	(7,626,382)	(11,491,058)
Issuances (in shares)		1,904,215	2,298,184	3,301,682
Ending balance (in shares)		(266,876,009)	(271,964,566)	(277,292,764)
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)		(581,146,136)	(581,146,136)	(581,146,136)
Ending balance (in shares)		(581,146,136)	(581,146,136)	(581,146,136)
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)		(309,181,570)	(303,853,372)	(274,013,542)
Treasury Stock, Shares, Acquired				(21,650,454)
Purchases (in shares)		(6,992,772)	(7,626,382)	(11,491,058)
Issuances (in shares)		1,904,215	2,298,184	3,301,682
Ending balance (in shares)		(314,270,127)	(309,181,570)	(303,853,372)