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Net Periodic Pension and Postretirement Benefit Costs (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
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 1 $ 1 2 $ 2
Interest cost 2 3 4 6
Expected return on plan assets (4) (6) (9) (11)
Net periodic benefit cost (1) (2) (3) (3)
Anticipated cash contributions        
Anticipated cash contributions in current year 1   1  
Pension Plan | Non-US        
Components of Net Periodic Benefit Costs        
Service cost 1 1 2 2
Interest cost 2 3 5 6
Expected return on plan assets (2) (2) (4) (4)
Amortization of actuarial loss   1 1 1
Net periodic benefit cost 1 3 4 5
Anticipated cash contributions        
Anticipated cash contributions in current year $ 3   3  
Postemployment Retirement Benefits        
Components of Net Periodic Benefit Costs        
Interest cost   1 1 2
Amortization of prior service credit     $ (1) (1)
Net periodic benefit cost   $ 1   $ 1