Accumulated Other Comprehensive Loss - Additional Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 15, 2013		Jun. 16, 2012		Jun. 15, 2013		Jun. 16, 2012
Losses/(gains) on cash flow hedges:
Total before tax	$ (8)				$ 51
Tax amounts	2				(19)
(Gains)/losses after tax	(6)				32
Amortization of pension and retiree medical items:
Net prior service cost (a)	1	[1]			0	[1]
Net actuarial losses	83	[1]			163	[1]
Total before tax	84		73		163		140
Tax amounts	(27)		(24)		(54)		(47)
Losses after tax	57		49		109		93
Total net losses reclassified for the period, net of tax	51				141
Cash Flow Hedges
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	(8)		26		51		38
Cash Flow Hedges | Foreign exchange contracts
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	1	[2]	5	[2]	4	[2]	2	[2]
Cash Flow Hedges | Foreign exchange contracts | Cost of Sales
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	1				4
Cash Flow Hedges | Interest rate derivatives
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	(18)	[2]	5	[2]	33	[2]	9	[2]
Cash Flow Hedges | Interest rate derivatives | Interest Expense
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	(18)				33
Cash Flow Hedges | Commodity contracts
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	9	[2]	16	[2]	14	[2]	27	[2]
Cash Flow Hedges | Commodity contracts | Cost of Sales
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	8				14
Cash Flow Hedges | Commodity contracts | Selling, General and Administrative Expenses
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	$ 1

[1] These items are included in the components of net periodic benefit cost for pension and retiree medical plans (see Note 7 for additional details).

[2] Interest rate derivative losses are included in interest expense. All other gains/losses are primarily included in cost of sales.