Gross Amount and Related Tax Benefit/(Expense) Recorded in and Associated with each Component of Other Comprehensive Income/(Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Foreign currency translation adjustments
OCI Before Reclassifications
Before Tax Amount	$ (776)	$ 207
Tax	0	0
Net of Tax Amount	(776)	207
Net investment hedge adjustments
OCI Before Reclassifications
Before Tax Amount	222	(19)
Tax	(56)	5
Net of Tax Amount	166	(14)
Amounts Excluded from Effectiveness Assessment
Before Tax Amount	7	6
Tax	(2)	(2)
Net of Tax Amount	5	4
Reclassifications
Before Tax Amount	(8)	0
Tax	2	2
Net of Tax Amount	(6)	2
Net cash flow hedge adjustments
OCI Before Reclassifications
Before Tax Amount	114	(18)
Tax	(13)	2
Net of Tax Amount	101	(16)
Amounts Excluded from Effectiveness Assessment
Before Tax Amount	5	6
Tax	0	0
Net of Tax Amount	5	6
Reclassifications
Before Tax Amount	(10)	(12)
Tax	0	4
Net of Tax Amount	(10)	(8)
Amortization of unrecognized losses/(gains)
OCI Before Reclassifications
Before Tax Amount	0	(1)
Tax	0	1
Net of Tax Amount	0	0
Net postemployment benefit plan adjustments
Reclassifications
Before Tax Amount	(34)	(78)
Tax	9	20
Net of Tax Amount	$ (25)	$ (58)