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Benefit Expenses (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Defined Benefit Plan Disclosure [Line Items]    
Pension Financing Benefits, net $ 4 $ 2
Scenario, Forecast [Member]    
Benefit Expenses    
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year 20  
Foreign Plan [Member]    
Benefit Expenses    
Interest cost (2) (2)
Expected return on plan assets 2 2
Domestic Plan [Member]    
Benefit Expenses    
Interest cost (6) (8)
Expected return on plan assets 10 10
Net pension (income) expense 3 $ 2
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits $ (1)