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Leases (Future Minimum Lease Payments Under Leases) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Leases [Abstract]  
2022 $ 17
2023 11
2024 3
2025 1
2026 1
2027 and thereafter 6
Total future minimum lease payments 39
Imputed interest (2)
Lease liabilities $ 37