Nonpension Postretirement and Postemployment Benefits Change in Projected Benefit Obligations, Plan Assets, and Funded Status, Postretirement (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Amounts Recognized in Balance Sheet
Other Assets	$ 448	$ 324
Other Liabilities	(32)	(34)
Nonpension postretirement
Defined Benefit Plan Change In Accumulated Benefit Obligation [Roll Forward]
Actuarial (gain) loss	152
U.S. and Canada | Nonpension postretirement
Defined Benefit Plan Change In Accumulated Benefit Obligation [Roll Forward]
Beginning of Year	1,157	1,116
Service Cost	13	13	$ 15
Interest Cost	20	31	37
Actuarial (gain) loss	(68)	55
Benefits paid	(57)	(58)
End of Year	1,065	1,157	1,116
Change in plan assets
Fair Value, Beginning of Year	1,491	1,364
Actual Return on Plan Assets	175	178
Employer Contributions	16	24
Benefits Paid, Plan Assets	(74)	(75)
Fair Value, End of Year	1,608	1,491	$ 1,364
Funded Status	543	334
Amounts Recognized in Balance Sheet
Other Assets	577	369
Other Current Liabilities	(2)	(1)
Other Liabilities	(32)	(34)
Net Amount Recognized	543	334
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss)
Prior Service Cost	(41)	(50)
Net Amount Recognized	$ (41)	$ (50)