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Leases (Maturities of Lease Liabilities) (Details)
$ in Millions
3 Months Ended
Mar. 31, 2023
USD ($)
Leases [Abstract]  
2023 (remainder) $ 3
2024 2
2025 2
2026 2
2027 3
2028 2
Thereafter 10
Total future minimum lease payments 23
Less imputed interest (6)
Total 17
Projected annual sublease income $ 4