Accumulated Other Comprehensive Loss - Additional Information (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 25, 2017	Mar. 19, 2016
Losses/(gains) on cash flow hedges:
Total before tax		$ (33)	$ (21)
Tax amounts		11	5
Net gains after tax		(22)	(16)
Amortization of pension and retiree medical items:
Amortization of prior service credits (a)		(6)	(9)
Net actuarial losses		34	46
Total before tax		28	37
Tax amounts		(9)	(12)
Net losses after tax		19	25
Total net (gains)/losses reclassified, net of tax		(3)	9
Cash Flow Hedges
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges		(33)	(21)
Cash Flow Hedges | Foreign exchange contracts
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	[1]	(5)	(21)
Cash Flow Hedges | Foreign exchange contracts | Cost of Sales
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges		(5)	(21)
Cash Flow Hedges | Interest rate derivatives
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	[1]	(30)	(3)
Cash Flow Hedges | Interest rate derivatives | Interest Expense
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges		(30)	(3)
Cash Flow Hedges | Commodity contracts
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	[1]	2	3
Cash Flow Hedges | Commodity contracts | Cost of Sales
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges		$ 2	1
Cash Flow Hedges | Commodity contracts | Selling, General and Administrative Expenses
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges			$ 2

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