Shareholders' Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended			12 Months Ended
	Jun. 15, 2013		Jun. 16, 2012	Dec. 29, 2012
Repurchase Of Shares Of Common Stock [Line Items]
Dollar Value of Shares Repurchased	$ 324	[1]	$ 289
Remaining dollar value of shares that may be repurchased	629
Shares Repurchased	4,778,000	[1]	4,315,000
Value Of Share Repurchases In Current Fiscal Quarter But With Settlement Dates In Subsequent Fiscal Quarter	15			20
Share Repurchases In Current Fiscal Quarter But With Settlement Dates In Subsequent Fiscal Quarter	200,000			300,000
January 2011 [Member]
Repurchase Of Shares Of Common Stock [Line Items]
Dollar Value of Shares Repurchased	0		188
Remaining dollar value of shares that may be repurchased	0
Expiration Date	June 2012
Shares Repurchased	0		2,787,000
November 2011 [Member]
Repurchase Of Shares Of Common Stock [Line Items]
Dollar Value of Shares Repurchased	0		101
Remaining dollar value of shares that may be repurchased	0
Expiration Date	May 2013
Shares Repurchased	0		1,528,000
November 2012 [Member]
Repurchase Of Shares Of Common Stock [Line Items]
Dollar Value of Shares Repurchased	324		0
Remaining dollar value of shares that may be repurchased	$ 629
Expiration Date	May 2014
Shares Repurchased	4,778,000		0

[1] Amount excludes the effect of $20 million in share repurchases (0.3 million shares) with trade dates prior to the 2012 fiscal year end but cash settlement dates subsequent to the 2012 fiscal year end and includes the effect of $15 million in share repurchases (0.2 million shares) with trade dates prior to June 15, 2013 but cash settlement dates subsequent to June 15, 2013.