Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 35,058	$ 28,559	$ 34,507	$ 29,675
Other comprehensive items before reclassifications			157
Amounts reclassified from accumulated other comprehensive items			20
Total other comprehensive items	(68)	99	177	(310)
Balance	36,854	29,875	36,854	29,875
Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(2,438)
Other comprehensive items before reclassifications			153
Total other comprehensive items			153
Balance	(2,285)		(2,285)
Unrealized Losses on Hedging Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(91)
Amounts reclassified from accumulated other comprehensive items			14
Total other comprehensive items			14
Balance	(77)		(77)
Pension and Other Postretirement Benefit Liability Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(278)
Other comprehensive items before reclassifications			4
Amounts reclassified from accumulated other comprehensive items			6
Total other comprehensive items			10
Balance	(268)		(268)
Accumulated Other Comprehensive Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(2,562)	(3,088)	(2,807)	(2,679)
Total other comprehensive items	(68)	99	177	(310)
Balance	$ (2,630)	$ (2,989)	$ (2,630)	$ (2,989)