Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 03, 2021	Mar. 28, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 34,507	$ 29,675
Other comprehensive items before reclassifications	230
Amounts reclassified from accumulated other comprehensive items	15
Total other comprehensive items	245	(409)
Balance	35,058	28,559
Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(2,438)
Other comprehensive items before reclassifications	224
Total other comprehensive items	224
Balance	(2,214)
Unrealized Losses on Hedging Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(91)
Amounts reclassified from accumulated other comprehensive items	13
Total other comprehensive items	13
Balance	(78)
Pension and Other Postretirement Benefit Liability Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(278)
Other comprehensive items before reclassifications	6
Amounts reclassified from accumulated other comprehensive items	2
Total other comprehensive items	8
Balance	(270)
Accumulated Other Comprehensive Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(2,807)	(2,679)
Total other comprehensive items	245	(409)
Balance	$ (2,562)	$ (3,088)