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Leases - Maturity of lease liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Operating leases    
2022 $ 42  
2023 29  
2024 21  
2024 12  
2026 7  
2027 and thereafter 17  
Total lease payments 128  
Less: imputed interest (12)  
Total operating lease liabilities 116 $ 138
Finance leases    
2022 17  
2023 17  
2024 15  
2025 15  
2026 15  
2027 and thereafter 28  
Total lease payments 107  
Less: imputed interest (9)  
Total finance lease liabilities 98 $ 108
Minimum payments related to leases not yet commenced-Finance leases $ 12