Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss Roll Forward (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 19, 2022	Mar. 20, 2021	Dec. 25, 2021	Dec. 26, 2020
Statement of Other Comprehensive Income [Abstract]
Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Post retirement Plans Taxes	$ 1,279	$ 1,509	$ 1,283	$ 1,514
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	(549)	128
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax	0	18
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax	(549)	146
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	(11)	(15)
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	(12,869)	(11,809)	(12,309)	(11,940)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	200	97
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	(62)	(1)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax	138	96
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax, Parent	(32)	(24)
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax	265	76	159	4
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax	(8)	(20)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax	25	52
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	17	32
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	(4)	(5)
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax	(2,737)	(3,493)	(2,750)	(3,520)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0	0
Other Comprehensive Income, Other, Before Tax	0	0
Other Comprehensive Income, Other, Taxes	(4)	0
Accumulated Other Comprehensive Income Loss Other	(2)	(20)	2	(20)
OCI, before Reclassifications, before Tax, Attributable to Parent	(357)	205
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	(37)	69
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(394)	274
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	(51)	(44)
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (15,343)	$ (15,246)	$ (14,898)	$ (15,476)