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Pension and Other Postretirement Benefits - Components (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Other Postretirement Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Interest cost $ 1 $ 1
Recognized prior service credit (7) (6)
Recognized net loss 1 1
Net periodic cost (benefit) (5) (4)
U.S. | Pension Plan    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 5 5
Interest cost 6 10
Expected return on plan assets (15) (18)
Recognized net loss 15 14
Net periodic cost (benefit) 11 11
Pension Benefits - Non-U.S. Plans | Pension Plan    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 3 3
Interest cost 9 14
Expected return on plan assets (20) (31)
Settlement loss 0 37
Recognized net loss 9 9
Net periodic cost (benefit) $ 1 $ 32