Accumulated Other Comprehensive Loss - Additional Information (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 23, 2019		Mar. 24, 2018		Dec. 29, 2018		Dec. 30, 2017
Reclassification Adjustments out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Post retirement Plans Taxes		$ 1,465		$ 1,332		$ 1,466		$ 1,338
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax		(11,445)	[1]	(9,987)	[2]	(11,918)	[1]	(10,277)	[2]
Losses/(gains) on cash flow hedges:
Total before tax		(15)		(55)
Tax amounts		4		14
Net gains after tax		(11)		(41)
Amortization of pension and retiree medical items:
Amortization of prior service credits		(2)		(4)
Net actuarial losses		36		47
Total before tax		34		43
Tax amounts		(7)		(10)
Net losses after tax		27		33
Total net losses/(gains) reclassified, net of tax		16		(8)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax		0		0
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax		60	[1]	75	[2]	87	[1]	47	[2]
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax		(3,254)	[1]	(2,780)	[2]	(3,271)	[1]	(2,804)	[2]
Accumulated Other Comprehensive Income (Loss), Debt Securities, Available-for-sale, Adjustment, after Tax		2	[1]	(6)	[2]	2	[1]	(4)	[2]
Accumulated Other Comprehensive Income Loss Other		(19)	[1]	(19)	[2]	(19)	[1]	(19)	[2]
Accumulated Other Comprehensive Income (Loss), Net of Tax		(14,656)	[1]	(12,717)	[2]	$ (15,119)	[1]	$ (13,057)	[2]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax		475	[3]	288
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax		(20)	[3]	93
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax		(16)	[3]	(13)
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, before Tax		0	[3]	(2)
Other Comprehensive Income (Loss), before Reclassifications, before Tax		0	[3]	0
OCI, before Reclassifications, before Tax, Attributable to Parent		439	[3]	366
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax		0		0
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		0		0
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent		19		(12)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax		475		288
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax		(35)		38
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax		18		30
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Tax		0		(2)
Other Comprehensive Income, Other, Before Tax		0		0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent		458		354
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax		(2)		2
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax		8		(10)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax		(1)		(6)
Other Comprehensive Income, Other, Taxes		0		0
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent		5		(14)
Cash Flow Hedges
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	[4]	(15)		(55)
Amortization of pension and retiree medical items:
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax		(10)		84
Cash Flow Hedges | Foreign exchange contracts
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	[4]	(5)		6
Amortization of pension and retiree medical items:
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax		(31)		(5)
Cash Flow Hedges | Foreign exchange contracts | Cost of Sales
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges		(5)		6
Cash Flow Hedges | Interest rate derivatives
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	[4]	(11)		(62)
Amortization of pension and retiree medical items:
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax		7		96
Cash Flow Hedges | Interest rate derivatives | Interest Expense
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges		(11)		(62)
Cash Flow Hedges | Commodity contracts
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	[4]	1		1
Amortization of pension and retiree medical items:
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax		4		2
Cash Flow Hedges | Commodity contracts | Cost of Sales
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges		1		2
Cash Flow Hedges | Commodity contracts | Selling, General and Administrative Expenses
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges		$ 0		$ (1)

[1] Pension and retiree medical amounts are net of taxes of $1,466 million as of December 29, 2018 and $1,465 million as of March 23, 2019.

[2] Currency translation adjustment primarily reflects appreciation of the Russian ruble and Mexican peso.

[3] Currency translation adjustment primarily reflects appreciation of the Russian ruble, Mexican peso and Pound sterling

[4] 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.