Retirement Plans - Net Periodic Benefit Cost (Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Other changes in plan assets and benefit obligations recognized in OCI
Current year actuarial loss (gain)	$ (285)	$ (1,148)	$ 144
Amortization of net actuarial gain (loss)	(83)	(150)	(184)
Amortization of prior service credit (cost)	(8)	(7)	(6)
Cost associated with defined the defined contribution component	140	131	128
Pension Benefits
Net periodic benefit cost (income)
Service cost	108	116	106
Interest cost	272	252	293
Expected return on plan assets	(609)	(573)	(574)
Amortization of prior service cost (credit)	13	12	11
Amortization of net actuarial loss (gain)	87	152	185
Net periodic benefit cost (income)	(129)	(41)	21
Other changes in plan assets and benefit obligations recognized in OCI
Current year actuarial loss (gain)	(246)	(1,135)	146
Current year prior service cost	4	20	8
Amortization of net actuarial gain (loss)	(87)	(152)	(185)
Amortization of prior service credit (cost)	(13)	(12)	(11)
Total recognized in OCI, before taxes	(342)	(1,279)	(42)
Total recognized in net periodic benefit cost (income) and OCI	(471)	(1,320)	(21)
Pension Benefits | United States
Other changes in plan assets and benefit obligations recognized in OCI
Cost associated with defined the defined contribution component	11	11	11
Postretirement Benefits Other than Pensions
Net periodic benefit cost (income)
Service cost	2	3	2
Interest cost	6	5	8
Expected return on plan assets	0	0	0
Amortization of prior service cost (credit)	(5)	(5)	(5)
Amortization of net actuarial loss (gain)	(4)	(2)	(1)
Net periodic benefit cost (income)	(1)	1	4
Other changes in plan assets and benefit obligations recognized in OCI
Current year actuarial loss (gain)	(39)	(13)	(2)
Current year prior service cost	0	0	0
Amortization of net actuarial gain (loss)	4	2	1
Amortization of prior service credit (cost)	5	5	5
Total recognized in OCI, before taxes	(30)	(6)	4
Total recognized in net periodic benefit cost (income) and OCI	$ (31)	$ (5)	$ 8