Effective Portion of Pre Tax Gains and Losses on Derivative Instruments (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 19, 2016	Mar. 21, 2015
Derivatives, Fair Value [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months		$ (3)
Fair Value/Non-designated Hedges
Derivatives, Fair Value [Line Items]
(Gains)/Losses Recognized in Income Statement (a)		(32)	$ 23
Cash Flow Hedges
Derivatives, Fair Value [Line Items]
Losses/(Gains) Recognized in Accumulated Other Comprehensive Loss		0	155
Losses/(Gains) Reclassified from Accumulated Other Comprehensive Loss into Income Statement (b)		(21)	179
Commodity Contract [Member] | Fair Value/Non-designated Hedges
Derivatives, Fair Value [Line Items]
(Gains)/Losses Recognized in Income Statement (a)	[1]	4	54
Commodity Contract [Member] | Cash Flow Hedges
Derivatives, Fair Value [Line Items]
Losses/(Gains) Recognized in Accumulated Other Comprehensive Loss			2
Losses/(Gains) Reclassified from Accumulated Other Comprehensive Loss into Income Statement (b)	[2]	$ 3	$ 8

[1] Foreign exchange derivative gains/losses are primarily included in selling, general and administrative expenses. Interest rate derivative gains/losses are primarily from fair value hedges and are included in interest expense. These gains/losses are substantially offset by increases/decreases in the value of the underlying debt, which are also included in interest expense. Commodity derivative gains/losses are included in either cost of sales or selling, general and administrative expenses, depending on the underlying commodity.

[2] Foreign exchange derivative gains/losses are primarily included in cost of sales. Interest rate derivative gains/losses are included in interest expense. Commodity derivative gains/losses are included in either cost of sales or selling, general and administrative expenses, depending on the underlying commodity.