Retirement Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2023	Jul. 03, 2022	Jul. 02, 2023	Jul. 03, 2022
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 16	$ 26	$ 33	$ 52
Interest cost	162	100	325	200
Expected return on plan assets	(208)	(227)	(415)	(455)
Net actuarial loss (gain)	184	53	367	107
Prior service (credit) cost	(3)	(5)	(7)	(10)
Net periodic benefit cost (credit)	151	(53)	303	(106)
Other Post-retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	2	2	3
Interest cost	8	5	15	10
Expected return on plan assets	(8)	(8)	(16)	(16)
Net actuarial loss (gain)	(8)	(5)	(16)	(9)
Prior service (credit) cost	0	1	1	1
Net periodic benefit cost (credit)	$ (7)	$ (5)	$ (14)	$ (11)