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Pensions and Other Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 3 Months Ended
Apr. 02, 2023
Apr. 03, 2022
Retirement Plans    
Components of net periodic benefit cost    
Service cost $ 212 $ 321
Interest cost 354 230
Expected return on plan assets (668) (699)
Amortization of prior service cost/(credit) (46) (46)
Recognized actuarial (gains) losses (50) 162
Curtailments and settlements 0 1
Net periodic benefit cost/(credit) (198) (31)
Other Benefit Plans    
Components of net periodic benefit cost    
Service cost 68 80
Interest cost 54 26
Expected return on plan assets (1) (2)
Amortization of prior service cost/(credit) 0 (1)
Recognized actuarial (gains) losses 6 30
Curtailments and settlements 0 0
Net periodic benefit cost/(credit) $ 127 $ 133