Retirement Plans - Obligations and Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2024	Dec. 30, 2023	Dec. 31, 2022
Pension Benefits
Change in projected benefit obligation
Projected benefit obligation at beginning of year	$ 7,205	$ 6,848
Service cost	69	67	$ 108
Interest cost	362	364	272
Plan participants’ contributions	0	0
Actuarial losses (gains)	(392)	330
Benefits paid	(454)	(444)
Plan amendment	19	7
Foreign exchange rate changes and other	(21)	33
Projected benefit obligation at end of year	6,788	7,205	6,848
Change in fair value of plan assets
Balance at beginning of year	8,413	7,943
Actual return on plan assets	806	832
Employer contributions	34	36
Benefits paid	(454)	(444)
Foreign exchange rate changes and other	(27)	46
Balance at end of year	8,772	8,413	7,943
Funded status at end of year	1,984	1,208
Postretirement Benefits Other than Pensions
Change in projected benefit obligation
Projected benefit obligation at beginning of year	136	150
Service cost	1	2	2
Interest cost	7	8	6
Plan participants’ contributions	3	3
Actuarial losses (gains)	(7)	(7)
Benefits paid	(19)	(20)
Plan amendment	0	0
Foreign exchange rate changes and other	0	0
Projected benefit obligation at end of year	121	136	$ 150
Change in fair value of plan assets
Funded status at end of year	$ (121)	$ (136)