Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 25, 2015	Sep. 25, 2015	Jun. 26, 2015	Mar. 27, 2015	Dec. 26, 2014	Sep. 26, 2014	Jun. 27, 2014	Mar. 28, 2014	Dec. 25, 2015	Dec. 26, 2014	Dec. 27, 2013
Selected Quarterly Financial Information [Abstract]
Revenue	$ 2,781	$ 2,939	$ 3,064	$ 3,027	$ 3,192	$ 3,221	$ 3,244	$ 3,012	$ 11,811	$ 12,669	$ 12,026
Operating Income	791	933	1,017	843	901	976	997	739	3,584	3,613	3,473
Net Earnings	$ 466	$ 507	$ 553	$ 442	$ 491	$ 509	$ 529	$ 398	$ 1,968	$ 1,927	$ 1,864
Earnings Per Share, Basic (dollars per share)	$ 0.48	$ 0.52	$ 0.56	$ 0.45	$ 0.49	$ 0.51	$ 0.53	$ 0.40	$ 2.00	$ 1.93	$ 1.83
Earnings Per Share, Assuming Dilution (dollars per share)	$ 0.48	$ 0.52	$ 0.56	$ 0.45	$ 0.49	$ 0.51	$ 0.53	$ 0.40	$ 2.00	$ 1.92	$ 1.83