Pensions and Other Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Retirement Plans
Components of net periodic benefit cost
Service cost	$ 313	$ 339	$ 953	$ 1,019
Interest cost	226	192	685	578
Expected return on plan assets	(683)	(661)	(2,075)	(1,988)
Amortization of prior service cost/(credit)	(46)	(46)	(138)	(136)
Recognized actuarial losses	163	314	492	944
Curtailments and settlements	0	0	1	1
Net periodic benefit cost	(27)	138	(82)	418
Other Benefit Plans
Components of net periodic benefit cost
Service cost	80	78	240	232
Interest cost	26	20	79	61
Expected return on plan assets	(2)	(1)	(6)	(5)
Amortization of prior service cost/(credit)	(1)	(8)	(4)	(23)
Recognized actuarial losses	30	38	91	113
Curtailments and settlements	0	0	0	0
Net periodic benefit cost	$ 133	$ 127	$ 400	$ 378