Shareholders' Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 28, 2013		Dec. 29, 2012		Dec. 31, 2011
Repurchase Of Shares Of The Company's Common Stock By Authorization Date
Shares Repurchased (in shares)	10,922,000	[1]	14,891,000	[1]	14,305,000	[2]
Stock Repurchased During Period, Value	$ 750	[1]	$ 985	[1]	$ 733	[2]
Stock Repurchase Program, Remaining Authorized Repurchase Amount	953
Value of share repurchases in current fiscal year but with settlement dates in subsequent year			20		19
Value of share repurchases in current fiscal year but with settlement dates in subsequent year (in shares)			300,000		400,000
November 2012
Repurchase Of Shares Of The Company's Common Stock By Authorization Date
Shares Repurchased (in shares)	10,922,000		1,069,000		0
Stock Repurchased During Period, Value	750		47		0
Authorized Share Repurchases			1,000
Expiration Date Of Share Repurchase Authorization			May 2014
November 2013
Repurchase Of Shares Of The Company's Common Stock By Authorization Date
Shares Repurchased (in shares)	0		0		0
Stock Repurchased During Period, Value	0		0		0
Authorized Share Repurchases	750
Expiration Date Of Share Repurchase Authorization	May 2015
November 2011
Repurchase Of Shares Of The Company's Common Stock By Authorization Date
Shares Repurchased (in shares)	0		11,035,000		0
Stock Repurchased During Period, Value	0		750		0
January 2011
Repurchase Of Shares Of The Company's Common Stock By Authorization Date
Shares Repurchased (in shares)	0		2,787,000		10,864,000
Stock Repurchased During Period, Value	0		188		562
March 2010
Repurchase Of Shares Of The Company's Common Stock By Authorization Date
Shares Repurchased (in shares)	0		0		3,441,000
Stock Repurchased During Period, Value	$ 0		$ 0		$ 171

[1] 2013 amount excludes and 2012 amount includes the effect of $20 million in share repurchases (0.3 million shares) with trade dates prior to the 2012 fiscal year end but with settlement dates subsequent to the 2012 fiscal year end.

[2] 2011 amount excludes the effect of $19 million in share repurchases (0.4 million shares) with trade dates prior to the 2010 fiscal year end but cash settlement dates subsequent to the 2010 fiscal year.