Pensions and Other Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Apr. 02, 2023
Retirement Plans
Components of net periodic benefit cost
Service cost	$ 224	$ 210
Interest cost	352	352
Expected return on plan assets	(642)	(668)
Amortization of prior service cost/‍(credit)	(46)	(46)
Recognized actuarial (gains)/losses	43	(50)
Curtailments and settlements	0	0
Net periodic benefit cost/(credit)	(69)	(202)
Other Benefit Plans
Components of net periodic benefit cost
Service cost	69	68
Interest cost	52	54
Expected return on plan assets	(2)	(1)
Amortization of prior service cost/‍(credit)	0	0
Recognized actuarial (gains)/losses	13	6
Curtailments and settlements	0	0
Net periodic benefit cost/(credit)	$ 132	$ 127