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Net Periodic Pension and Postretirement Benefit Costs (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
US        
Employer contributions        
Employer contributions     $ 1  
Non-US        
Employer contributions        
Employer contributions     2  
Pension Plan        
Anticipated cash contributions        
Anticipated cash contributions in current year $ 4   4  
Pension Plan | US        
Components of Net Periodic Benefit Costs        
Service cost 2 $ 2 4 $ 4
Interest cost 2 4 8 11
Expected return on plan assets (5) (5) (16) (14)
Net periodic benefit cost/(benefit) (1) 1 (4) 1
Anticipated cash contributions        
Anticipated cash contributions in current year 1   1  
Pension Plan | Non-US        
Components of Net Periodic Benefit Costs        
Service cost 1   3 2
Interest cost 2 3 8 8
Expected return on plan assets (2) (2) (6) (6)
Amortization of actuarial loss 1   2 1
Net periodic benefit cost/(benefit) 2 1 7 5
Anticipated cash contributions        
Anticipated cash contributions in current year $ 3   3  
Postemployment Retirement Benefits        
Components of Net Periodic Benefit Costs        
Interest cost   1 2 2
Amortization of prior service credit     (1) (1)
Net periodic benefit cost/(benefit)   $ 1 $ 1 $ 1