Shareholders' Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended			12 Months Ended
	Mar. 22, 2014	Mar. 23, 2013		Dec. 28, 2013
Repurchase Of Shares Of Common Stock [Line Items]
Dollar Value of Shares Repurchased	$ 124	$ 78	[1]
Remaining dollar value of shares that may be repurchased	829
Shares Repurchased	1,696,000	1,198,000	[1]
Value Of Share Repurchases In Current Fiscal Quarter But With Settlement Dates In Subsequent Fiscal Quarter				20
Share Repurchases In Current Fiscal Quarter But With Settlement Dates In Subsequent Fiscal Quarter				300,000
November 2012 [Member]
Repurchase Of Shares Of Common Stock [Line Items]
Dollar Value of Shares Repurchased	124	78
Remaining dollar value of shares that may be repurchased	79
Shares Repurchased	1,696,000	1,198,000
November 2013 [Member]
Repurchase Of Shares Of Common Stock [Line Items]
Dollar Value of Shares Repurchased	0	0
Remaining dollar value of shares that may be repurchased	$ 750
Shares Repurchased	0	0

[1] Amount excludes the effect of $20 million in share repurchases (0.3 million shares) with trade dates prior to 2013 and cash settlement dates during 2013.