Equity - Reclassifications Out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Derivative Instruments, Gain (Loss) [Line Items]
COGS	$ 2,268	$ 2,275	$ 4,536	$ 4,690
SG&A	(691)	(789)	(1,375)	(1,515)
Interest expense	69	75	133	149
Net experience (gain) loss	1	1	2	2
Prior service cost	(1)		(1)
Other (Income) expense	30	45	79	97
Total before tax	467	367	912	726
Tax expense (benefit)	(109)	(74)	(203)	(146)
Net income	354	292	704	577
Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Net income	2	1	3	1
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Total before tax	5	2	7	3
Tax expense (benefit)	(2)	(1)	(2)	(1)
Net income	3	1	5	2
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	5	2	7	3
Reclassification out of Accumulated Other Comprehensive Income | Amortization of postretirement and postemployment benefits
Derivative Instruments, Gain (Loss) [Line Items]
Total before tax	(2)	(1)	(3)	(2)
Tax expense (benefit)	1	1	1	1
Net income	(1)	0	(2)	(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)	(2)	$ (2)
Prior service cost	$ (1)		$ (1)