Accumulated Other Comprehensive Loss - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 15, 2019	Mar. 23, 2019	Jun. 16, 2018	Mar. 24, 2018	Jun. 15, 2019	Jun. 16, 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	$ 1,454	$ 1,465	$ 1,314	$ 1,332	$ 1,454	$ 1,314	$ 1,466	$ 1,338
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	(11,810)	(11,445)	(10,958)	(9,987)	(11,810)	(10,958)	(11,918)	(10,277)
Losses/(gains) on cash flow hedges:
Total before tax	29	(15)	128	(55)	14	73
Tax amounts	(6)		(31)		(2)	(17)
Net losses after tax	23		97		12	56
Amortization of pension and retiree medical items:
Amortization of prior service credits	(2)		(4)		(4)	(8)
Net actuarial losses	39		50		75	97
Total before tax	37	34	46	43	71	89
Tax amounts	(8)		(10)		(15)	(20)
Net losses after tax	29		36		56	69
Total net losses reclassified, net of tax	52		133		68	125
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	0	0	0	0
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	54	60	123	75	54	123	87	47
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax	(3,212)	(3,254)	(2,724)	(2,780)	(3,212)	(2,724)	(3,271)	(2,804)
AOCI, Debt Securities, Available-for-sale, Adjustment, after Tax	3	2	(2)	(6)	3	(2)	2	(4)
Accumulated Other Comprehensive Income Loss Other	(19)	(19)	(19)	(19)	(19)	(19)	(19)	(19)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(14,984)	(14,656)	(13,580)	(12,717)	(14,984)	(13,580)	$ (15,119)	$ (13,057)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	(365)	475	(953)	288
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(37)	(20)	(70)	93
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax	16	(16)	28	(13)
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, before Tax	1	0	4	(2)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	0	0	0	0
OCI, before Reclassifications, before Tax, Attributable to Parent	(385)	439	(991)	366
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax	0	0	0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0	0	0	0
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	66	19	174	(12)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax	(365)	475	(953)	288
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax	(8)	(35)	58	38
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	53	18	74	30
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Tax	1	0	4	(2)
Other Comprehensive Income, Other, Before Tax	0	0	0	0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(319)	458	(817)	354
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	0	(2)	(18)	2
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	2	8	(10)	(10)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	(11)	(1)	(18)	(6)
Other Comprehensive Income, Other, Taxes	0	0	0	0
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	(9)	$ 5	(46)	$ (14)
Cash Flow Hedges
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	29		128		14	73
Amortization of pension and retiree medical items:
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(32)		(6)		(42)	78
Cash Flow Hedges | Foreign exchange contracts
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	1		10		(4)	16
Amortization of pension and retiree medical items:
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	13		35		(18)	30
Cash Flow Hedges | Foreign exchange contracts | Revenue, Net [Member]
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	1		0		1	0
Cash Flow Hedges | Foreign exchange contracts | Cost of sales
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	0		10		(5)	16
Cash Flow Hedges | Interest rate derivatives
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	27		117		16	55
Amortization of pension and retiree medical items:
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(59)		(105)		(52)	(9)
Cash Flow Hedges | Interest rate derivatives | Interest Expense
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	27		117		16	55
Cash Flow Hedges | Commodity contracts
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	1		1		2	2
Amortization of pension and retiree medical items:
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	9		0		13	2
Cash Flow Hedges | Commodity contracts | Cost of sales
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	1		1		2	3
Cash Flow Hedges | Commodity contracts | Selling, general and administrative expenses
Losses/(gains) on cash flow hedges:
Losses/(gains) on cash flow hedges	$ 0		$ 0		$ 0	$ (1)