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Leases - Schedule of Future Minimum Lease Payments Under Operating Leases (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Operating Lease Liabilities, Payments Due [Abstract]    
2021 $ 133  
2022 98  
2023 69  
2024 51  
2025 39  
2026 and thereafter 108  
Total future minimum lease payments 498  
Less: Interest (45)  
Operating lease liabilities $ 453 $ 449