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Pension and Other Postretirement Benefit Plans - Summary of Components of Net Periodic Pension Costs (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Other Postretirement Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 2 $ 2
Interest cost 3 4
Expected return on plan assets 0 0
Amortization:    
Actuarial loss 0 0
Prior service credit (2) (2)
Settlement and curtailment (gain) loss 0 (7)
Net periodic benefit cost (credit) 3 (3)
United States Pension Benefits | Pension Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 1 1
Interest cost 25 31
Expected return on plan assets (41) (44)
Amortization:    
Actuarial loss 15 12
Prior service credit 0 (1)
Settlement and curtailment (gain) loss 0 0
Net periodic benefit cost (credit) 0 (1)
Foreign Pension Benefits | Pension Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 2 1
Interest cost 4 6
Expected return on plan assets (8) (7)
Amortization:    
Actuarial loss 3 2
Prior service credit 0 0
Settlement and curtailment (gain) loss 0 1
Net periodic benefit cost (credit) $ 1 $ 3