Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss Roll Forward (Details) - USD ($) $ in Millions	3 Months Ended						8 Months Ended
	Sep. 05, 2020	Jun. 13, 2020	Mar. 21, 2020	Sep. 07, 2019	Jun. 15, 2019	Mar. 23, 2019	Sep. 05, 2020	Sep. 07, 2019	Dec. 28, 2019	Dec. 29, 2018
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	$ 0			$ 2			$ 0	$ 6
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	55			38			162	113
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax	0			18			0	18
Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Post retirement Plans Taxes	1,340	$ 1,337	$ 1,356	1,437	$ 1,454	$ 1,465	1,340	1,437	$ 1,370	$ 1,466
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	(12,426)	(12,840)	(12,044)	(11,969)	(11,810)	(11,445)	(12,426)	(11,969)	(11,290)	(11,918)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	(40)	(51)	(64)	16	54	60	(40)	16	(3)	87
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax	(2,869)	(2,868)	(2,931)	(3,156)	(3,212)	(3,254)	(2,869)	(3,156)	(2,988)	(3,271)
Accumulated Other Comprehensive Income Loss Other	(22)	(19)	(18)	(17)	(16)	(17)	(22)	(17)	(19)	(17)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(15,357)	(15,778)	(15,057)	(15,126)	(14,984)	(14,656)	(15,357)	(15,126)	$ (14,300)	$ (15,119)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	385	(827)	(735)	(149)	(365)	475
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	115	144	(236)	(95)	(37)	(20)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax	(59)	25	21	19	16	(16)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(3)	(1)	1	(1)	1	0
OCI, before Reclassifications, before Tax, Attributable to Parent	438	(659)	(949)	(226)	(385)	439
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax	0	0	0	0	0	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	(100)	(127)	157	43	29	(15)	(70)	57
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax	55	57	50	54	37	34	162	125
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0	0	0	0	0	0
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	(45)	(70)	207	97	66	19
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax	385	(827)	(735)	(149)	(365)	475
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax	15	17	(79)	(52)	(8)	(35)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	(4)	82	71	73	53	18
Other Comprehensive Income, Other, Before Tax	(3)	(1)	1	(1)	1	0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	393	(729)	(742)	(129)	(319)	458
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	29	31	(19)	(10)	0	(2)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	(4)	(4)	18	14	2	8
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	3	(19)	(14)	(17)	(11)	(1)
Other Comprehensive Income, Other, Taxes	0	0	0	0	0	0
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	28	$ 8	$ (15)	(13)	$ (9)	$ 5
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	100			(43)			70	(57)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(3)			(55)			(136)	(97)
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	22			(4)			37	0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	$ (31)			$ 2			$ 47	$ (16)