Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ 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
Numerator:
Net Earnings	$ 466	$ 507	$ 553	$ 442	$ 491	$ 509	$ 529	$ 398	$ 1,968	$ 1,927	$ 1,864
Dividend Equivalents on Restricted Stock									(1)	(1)	0
Net Earnings, Attributable to Common Shareholders									$ 1,967	$ 1,926	$ 1,864
Denominator:
Average Common Shares Outstanding (in shares)									983	1,001	1,019
Other Potentially Dilutive Common Shares (in shares)									1	1	0
Average Common Shares Outstanding, Assuming Dilution (in shares)									984	1,002	1,019
Net 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
Net 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