Nonpension Postretirement and Postemployment Benefits Change in Projected Benefit Obligations, Plan Assets, and Funded Status, Postemployment (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019
Defined Benefit Plan Change In Accumulated Benefit Obligation [Roll Forward]
Other Assets	$ 324	$ 241
Amounts Recognized in Balance Sheet
Other Liabilities	(34)	(33)
Postemployment
Defined Benefit Plan Change In Accumulated Benefit Obligation [Roll Forward]
Beginning of Year	48	42
Service Cost	3	3
Interest Cost	1	2
Actuarial (gain) loss	0	8
Benefits paid	(4)	(7)
End of Year	48	48
Funded Status	(48)	(48)
Amounts Recognized in Balance Sheet
Other Current Liabilities	(6)	(7)
Other Liabilities	(42)	(41)
Net Amount Recognized	(48)	(48)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss)
Prior Service Cost	2	3
Net experience loss	(18)	(22)
Net Amount Recognized	$ (16)	$ (19)