Quarterly Financial Data (Unaudited) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 26, 2014	Sep. 26, 2014	Jun. 27, 2014	Mar. 28, 2014	Dec. 27, 2013	Sep. 27, 2013	Jun. 28, 2013	Mar. 29, 2013	Dec. 26, 2014	Dec. 27, 2013	Dec. 28, 2012
Selected Quarterly Financial Information [Abstract]
Revenue	$ 3,192	$ 3,221	$ 3,244	$ 3,012	$ 3,032	$ 2,985	$ 3,046	$ 2,963	$ 12,669	$ 12,026	$ 11,763
Operating Income	901	976	997	739	813	840	940	880	3,613	3,473	3,464
Net Earnings	$ 491	$ 509	$ 529	$ 398	$ 426	$ 455	$ 521	$ 462	$ 1,927	$ 1,864	$ 1,863
Earnings Per Share, Basic (dollars per share)	$ 0.49	$ 0.51	$ 0.53	$ 0.40	$ 0.42	$ 0.45	$ 0.51	$ 0.45	$ 1.93	$ 1.83	$ 1.80
Earnings Per Share, Assuming Dilution (dollars per share)	$ 0.49	$ 0.51	$ 0.53	$ 0.40	$ 0.42	$ 0.45	$ 0.51	$ 0.45	$ 1.92	$ 1.83	$ 1.79