Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 27,586	$ 25,413
Other comprehensive income (loss) before reclassifications	(14)
Amounts reclassified from accumulated other comprehensive items	3
Total other comprehensive items	(11)	49
Balance	27,693	26,123
Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(2,243)
Other comprehensive income (loss) before reclassifications	(15)
Total other comprehensive items	(15)
Balance	(2,258)
Unrealized Losses on Hedging Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(52)
Amounts reclassified from accumulated other comprehensive items	2
Total other comprehensive items	2
Balance	(50)
Pension and Other Postretirement Benefit Liability Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(203)
Other comprehensive income (loss) before reclassifications	1
Amounts reclassified from accumulated other comprehensive items	1
Total other comprehensive items	2
Balance	(201)
Accumulated Other Comprehensive Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(2,498)	(2,003)
Total other comprehensive items	(11)	49
Balance	$ (2,509)	$ (2,042)