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Leases - Schedule of Future Lease Payments Under Non-cancellable Operating Leases (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Leases [Abstract]  
2020 $ 72
2021 59
2022 50
2023 44
2024 41
Thereafter 37
Total future lease payments 303
Less imputed interest (30)
Total lease liabilities $ 273