Equity Reclassifications Out of AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Derivative Instruments, Gain (Loss) [Line Items]
COGS	$ (9,043)	$ (9,197)	$ (8,821)
SGA	(2,966)	(2,980)	(3,020)
Interest expense	281	284	287
Net experience (gain) loss, pre-tax	(3)	(5)	(5)
Prior service cost	(1)	(1)	0
Other (income) expense	(121)	(188)	90
Total before tax	1,601	1,305	1,329
Tax (expense) benefit	(323)	(321)	(181)
Net income	1,264	977	1,344
Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Net income	7	(6)	2
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Total before tax	14	4	8
Tax (expense) benefit	(4)	(1)	(2)
Net income	10	3	6
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	14	4	8
Reclassification out of Accumulated Other Comprehensive Income | Amortization of postretirement and postemployment benefits
Derivative Instruments, Gain (Loss) [Line Items]
Net experience (gain) loss, pre-tax	(3)	(5)	(5)
Prior service cost	(1)	(1)	0
Total before tax	(4)	(6)	(5)
Tax (expense) benefit	1	1	1
Net income	(3)	(5)	(4)
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on available-for-sale securities
Derivative Instruments, Gain (Loss) [Line Items]
Total before tax	0	(4)	0
Tax (expense) benefit	0	0	0
Net income	0	(4)	0
Corporate bonds | Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on available-for-sale securities
Derivative Instruments, Gain (Loss) [Line Items]
Other (income) expense	$ 0	$ (4)	$ 0