Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss Roll Forward (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 23, 2019		Mar. 24, 2018		Dec. 29, 2018		Dec. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax		$ (2)		$ (4)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax		(36)		(47)
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]
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
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax		(15)		(55)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax		34		43
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, 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 (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax		0		0
Other Comprehensive Income, Other, Taxes		0		0
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent		5		(14)
Cash Flow Hedging [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	[4]	15		55
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax		(10)		84
Cash Flow Hedging [Member] | Foreign Exchange Forward [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	[4]	5		(6)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax		$ (31)		$ (5)

[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.