Retirement Plans - Obligations and Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Pension Benefits
Change in projected benefit obligation
Projected benefit obligation at beginning of year	$ 9,339	$ 9,833
Service cost	108	116	$ 106
Interest cost	272	252	293
Plan participants’ contributions	0	0
Actuarial gains	(2,373)	(436)
Benefits paid	(448)	(446)
Plan amendment	1	18
Foreign exchange rate changes and other	(51)	2
Projected benefit obligation at end of year	6,848	9,339	9,833
Change in fair value of plan assets
Balance at beginning of year	9,947	9,080
Actual return on plan assets	(1,520)	1,273
Employer contributions	37	42
Benefits paid	(448)	(446)
Foreign exchange rate changes and other	(73)	(2)
Balance at end of year	7,943	9,947	9,080
Funded status at end of year	1,095	608
Postretirement Benefits Other than Pensions
Change in projected benefit obligation
Projected benefit obligation at beginning of year	202	230
Service cost	2	3	2
Interest cost	6	5	8
Plan participants’ contributions	4	4
Actuarial gains	(40)	(13)
Benefits paid	(24)	(27)
Plan amendment	0	0
Foreign exchange rate changes and other	0	0
Projected benefit obligation at end of year	150	202	$ 230
Change in fair value of plan assets
Funded status at end of year	$ (150)	$ (202)