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Leases (Schedule of Additional Lease Information) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Cash outflows for lease liabilities:    
Operating cash flows, Finance lease $ 8 $ 7
Right-of-use assets obtained in exchange for new lease liabilities, Finance lease $ 20  
Weighted average remaining lease term (years), Finance lease 5 years 6 years
Weighted average discount rate, Finance lease 4.20% 4.20%
Operating cash flows, Operating lease $ 14 $ 15
Investing cash flows, Operating lease $ 9 9
Right-of-use assets obtained in exchange for new lease liabilities, Operating lease   $ 7
Weighted average remaining lease term (years), Operating lease 1 year 8 months 12 days 1 year 6 months
Weighted average discount rate, Operating lease 2.80% 1.30%