Equity - Reclassifications Out of AOCI (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Oct. 02, 2021	Sep. 26, 2020	Oct. 02, 2021	Sep. 26, 2020
Derivative Instruments, Gain (Loss) [Line Items]
COGS		$ 2,457	$ 2,228	$ 7,206	$ 6,764
SG&A		(718)	(790)	(2,132)	(2,166)
Interest expense		55	63	172	196
Net experience (gain) loss		0	0	2	2
Prior service cost			0		(1)
Other (Income) expense		0	70	155	151
Total before tax		392	418	1,406	1,331
Tax expense (benefit)		(92)	(65)	(345)	(268)
Net income		305	352	1,061	1,056
Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Net income		1	3	11	6
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Total before tax		4	4	19	11
Tax expense (benefit)		(1)	(1)	(5)	(3)
Net income		3	3	14	8
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]	4	4	19	11
Reclassification out of Accumulated Other Comprehensive Income | Amortization of postretirement and postemployment benefits
Derivative Instruments, Gain (Loss) [Line Items]
Total before tax		0	0	(2)	(3)
Tax expense (benefit)		0	0	1	1
Net income		0	0	(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]	0	0	(2)	(2)
Prior service cost	[2]		$ 0		$ (1)
Corporate bonds | Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Total before tax		(2)		(2)
Tax expense (benefit)		0		0
Net income		(2)		(2)
Corporate bonds | Reclassification out of Accumulated Other Comprehensive Income | Other income (expense)
Derivative Instruments, Gain (Loss) [Line Items]
Other (Income) expense	[1]	$ (2)		$ (2)

[1] See Derivative instruments and fair value measurements note

[2] See Employee benefits note