Equity - Reclassifications Out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
COGS	$ 2,268	$ 2,415
SG&A	(685)	(726)
Interest expense	64	74
Net experience (gain) loss	1	1
Other (Income) expense	51	52
Total before tax	446	359
Tax expense (benefit)	(94)	(72)
Net income	350	285
Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Net income	1	0
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Total before tax	2	1
Tax expense (benefit)	0	0
Net income	2	1
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	2	1
Reclassification out of Accumulated Other Comprehensive Income | Amortization of postretirement and postemployment benefits
Derivative Instruments, Gain (Loss) [Line Items]
Total before tax	(1)	(1)
Tax expense (benefit)	0	0
Net income	(1)	(1)
Reclassification out of Accumulated Other Comprehensive Income | Amortization of postretirement and postemployment benefits | Other income (expense)
Derivative Instruments, Gain (Loss) [Line Items]
Net experience (gain) loss	$ (1)	$ (1)