Our Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Capitalized Computer Software, Net	$ 791	$ 863
Capitalized Computer Software, Amortization	214	202	$ 208
Shipping and handling expenses	9,700	9,400	9,700
Research and development costs	760	754	718
Amount of prepaid incentive arrangements	291	321
Advertising and other marketing activities	4,200	3,900	3,900
Advertising expenses	2,500	2,400	$ 2,300
Deferred advertising costs	$ 32	$ 40