Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss Roll Forward (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 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)		$ (4)	$ (8)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	(39)		(50)		(75)	(97)
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)
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
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	29	(15)	128	(55)	14	73
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax	37	34	46	43	71	89
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, 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 (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax	0	0	0	0
Other Comprehensive Income, Other, Taxes	0	0	0	0
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	(9)	$ 5	(46)	$ (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	(29)		(128)		(14)	(73)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(32)		(6)		(42)	78
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	(1)		(10)		4	(16)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	$ 13		$ 35		$ (18)	$ 30