Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss Roll Forward (Details) - USD ($) $ in Millions	3 Months Ended						8 Months Ended
	Sep. 04, 2021	Jun. 12, 2021	Mar. 20, 2021	Sep. 05, 2020	Jun. 13, 2020	Mar. 21, 2020	Sep. 04, 2021	Sep. 05, 2020	Dec. 26, 2020	Dec. 28, 2019
Statement of Other Comprehensive Income [Abstract]
Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Post retirement Plans Taxes	$ 1,478	$ 1,504	$ 1,509	$ 1,340	$ 1,337	$ 1,356	$ 1,478	$ 1,340	$ 1,514	$ 1,370
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	(319)	255	128	385	(827)	(735)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax	0	0	18	0	0	0	18	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax	(319)	255	146	385	(827)	(735)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	(16)	13	(15)	29	31	(19)
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	(11,876)	(11,541)	(11,809)	(12,426)	(12,840)	(12,044)	(11,876)	(12,426)	(11,940)	(11,290)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(45)	175	97	115	144	(236)
Net losses/(gains) before tax	14	(53)	(1)	(100)	(127)	157	(40)	(70)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax	(31)	122	96	15	17	(79)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	10	(29)	(24)	(4)	(4)	18
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	148	169	76	(40)	(51)	(64)	148	(40)	4	(3)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax	49	(28)	(20)	(59)	25	21
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax	67	57	52	55	57	50	176	162
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	116	29	32	(4)	82	71
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	(26)	(5)	(5)	3	(19)	(14)
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax	(3,379)	(3,469)	(3,493)	(2,869)	(2,868)	(2,931)	(3,379)	(2,869)	(3,520)	(2,988)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	0	2	0	(3)	(1)	1
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0	0	0	0	0	0
Other Comprehensive Income, Other, Before Tax	0	2	0	(3)	(1)	1
Other Comprehensive Income, Other, Taxes	0	0	0	0	0	0
Accumulated Other Comprehensive Income Loss Other	(18)	(18)	(20)	(22)	(19)	(18)	(18)	(22)	(20)	(19)
OCI, before Reclassifications, before Tax, Attributable to Parent	(315)	404	205	438	(659)	(949)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	81	4	69	(45)	(70)	207
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(234)	408	274	393	(729)	(742)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	(32)	(21)	(44)	28	8	(15)
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (15,125)	$ (14,859)	$ (15,246)	$ (15,357)	$ (15,778)	$ (15,057)	$ (15,125)	$ (15,357)	$ (15,476)	$ (14,300)