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Pension and Other Postretirement Benefits - Pension benefit payments (Details) - Pension Plan - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
UNITED STATES    
Benefit plans    
Employer contributions $ 1 $ 1
Expected contribution in next fiscal year 1  
Expected future benefit payments    
2022 23  
2023 24  
2024 24  
2025 23  
2026 25  
Years 2027 - 2030 125  
Non-US    
Benefit plans    
Employer contributions 7 $ 4
Expected contribution in next fiscal year 3  
Expected future benefit payments    
2022 12  
2023 13  
2024 13  
2025 13  
2026 13  
Years 2027 - 2030 $ 72