Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2021	Sep. 26, 2020	Oct. 02, 2021	Sep. 26, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 36,854	$ 29,875	$ 34,507	$ 29,675
Other comprehensive items before reclassifications			128
Amounts reclassified from accumulated other comprehensive items			25
Total other comprehensive items	(24)	19	153	(291)
Balance	38,710	31,824	38,710	31,824
Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(2,438)
Other comprehensive items before reclassifications			121
Total other comprehensive items			121
Balance	(2,317)		(2,317)
Unrealized Losses on Hedging Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(91)
Amounts reclassified from accumulated other comprehensive items			16
Total other comprehensive items			16
Balance	(75)		(75)
Pension and Other Postretirement Benefit Liability Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(278)
Other comprehensive items before reclassifications			7
Amounts reclassified from accumulated other comprehensive items			9
Total other comprehensive items			16
Balance	(262)		(262)
Accumulated Other Comprehensive Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(2,630)	(2,989)	(2,807)	(2,679)
Total other comprehensive items	(24)	19	153	(291)
Balance	$ (2,654)	$ (2,970)	$ (2,654)	$ (2,970)