Equity - Reclassifications Out of AOCI (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020
Derivative Instruments, Gain (Loss) [Line Items]
COGS		$ 2,331	$ 2,268	$ 4,749	$ 4,536
SG&A		(720)	(691)	(1,414)	(1,375)
Interest expense		58	69	117	133
Net experience (gain) loss		1	1	2	2
Prior service cost			(1)		(1)
Other (Income) expense		86	30	155	79
Total before tax		532	467	1,014	912
Tax expense (benefit)		(144)	(109)	(253)	(203)
Net income		385	354	756	704
Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Net income		7	2	10	3
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Total before tax		10	5	15	7
Tax expense (benefit)		(3)	(2)	(4)	(2)
Net income		7	3	11	5
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	[1]	10	5	15	7
Reclassification out of Accumulated Other Comprehensive Income | Amortization of postretirement and postemployment benefits
Derivative Instruments, Gain (Loss) [Line Items]
Total before tax		(1)	(2)	(2)	(3)
Tax expense (benefit)		1	1	1	1
Net income		0	(1)	(1)	(2)
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	[2]	$ (1)	(1)	$ (2)	(2)
Prior service cost	[2]		$ (1)		$ (1)

[1] See Derivative instruments and fair value measurements note

[2] See Employee benefits note