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Benefit Plans - Components of Net Periodic Pension Cost/(Benefit) (Details) - Pension Plans - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
U.S. Plans        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 0 $ 1 $ 2 $ 4
Interest cost 16 13 48 36
Expected return on plan assets (24) (21) (73) (57)
Amortization:        
Net loss from experience differences 0 1 0 6
Prior service cost/(benefit) 0 1 1 1
Settlement losses and other expenses 5 5 13 12
Net periodic pension (benefit)/cost (3) 0 (9) 2
Non-U.S. Plans        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 13 22 40 77
Interest cost 76 47 228 135
Expected return on plan assets (101) (92) (303) (279)
Amortization:        
Net loss from experience differences 10 14 31 48
Prior service cost/(benefit) 0 0 0 (1)
Settlement losses and other expenses 0 0 0 0
Net periodic pension (benefit)/cost $ (2) $ (9) $ (4) $ (20)