Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 29,675	$ 27,586
Other comprehensive items before reclassifications	(414)
Amounts reclassified from accumulated other comprehensive items	5
Total other comprehensive items	(409)	(11)
Balance	28,559	27,693
Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(2,320)
Other comprehensive items before reclassifications	(357)
Amounts reclassified from accumulated other comprehensive items	0
Total other comprehensive items	(357)
Balance	(2,677)
Unrealized Losses on Hedging Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(71)
Other comprehensive items before reclassifications	(62)
Amounts reclassified from accumulated other comprehensive items	1
Total other comprehensive items	(61)
Balance	(132)
Pension and Other Postretirement Benefit Liability Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(288)
Other comprehensive items before reclassifications	5
Amounts reclassified from accumulated other comprehensive items	4
Total other comprehensive items	9
Balance	(279)
Accumulated Other Comprehensive Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(2,679)	(2,498)
Total other comprehensive items	(409)	(11)
Balance	$ (3,088)	$ (2,509)