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Retirement Plans (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 29, 2024
Jul. 01, 2023
Jun. 29, 2024
Jul. 01, 2023
Pension Benefits        
Net periodic benefit income        
Service cost $ 17 $ 16 $ 34 $ 33
Interest cost 91 91 181 182
Expected return on plan assets (159) (153) (318) (305)
Amortization of net actuarial loss 1 1 2 1
Amortization of prior service cost 3 3 5 6
Net periodic benefit income (47) (42) (96) (83)
Pension Benefits | United States        
Net periodic benefit income        
Cost associated with the defined contribution component 2 2 6 6
Postretirement Benefits Other Than Pensions        
Net periodic benefit income        
Service cost 1 1 1 1
Interest cost 1 2 3 4
Amortization of net actuarial loss (2) (2) (4) (4)
Amortization of prior service cost (1) (1) (1) (2)
Net periodic benefit income $ (1) $ 0 $ (1) $ (1)