Basis of Presentation and Our Divisions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 21, 2015		Mar. 22, 2014
Basis Of Presentation And Our Divisions [Line Items]
Operating Profit	$ 1,797		$ 1,807
Corporate Unallocated Net Impact Of Mark To Market On Commodity Hedges [Member]
Basis Of Presentation And Our Divisions [Line Items]
Operating Profit	(1)		34
Corporate Unallocated Restructuring And Impairment Charges [Member]
Basis Of Presentation And Our Divisions [Line Items]
Operating Profit	(6)	[1]	3	[1]
Corporate Unallocated Other [Member]
Basis Of Presentation And Our Divisions [Line Items]
Operating Profit	$ (229)		$ (259)

[1] Income amount represents adjustments for changes in estimates of previously recorded amounts.