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Retirement Plans (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 28, 2024
Sep. 30, 2023
Sep. 28, 2024
Sep. 30, 2023
Pension Benefits        
Net periodic benefit income        
Service cost $ 18 $ 17 $ 52 $ 50
Interest cost 91 91 272 273
Expected return on plan assets (159) (152) (477) (457)
Amortization of net actuarial loss 1 0 3 1
Amortization of prior service cost 1 3 6 9
Net periodic benefit income (48) (41) (144) (124)
Pension Benefits | United States        
Net periodic benefit income        
Cost associated with the defined contribution component 2 2 8 8
Postretirement Benefits Other Than Pensions        
Net periodic benefit income        
Service cost 0 1 1 2
Interest cost 2 2 5 6
Amortization of net actuarial loss (2) (2) (6) (6)
Amortization of prior service cost 0 (1) (1) (3)
Net periodic benefit income $ 0 $ 0 $ (1) $ (1)