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Leases (Supplemental Information Relating to Operating Leases) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Leases [Abstract]    
Lease expense incurred: Operating lease cost $ 28 $ 27
Operating lease right of use assets $ 128 $ 139
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Other Assets Other Assets
Operating lease liabilities $ 147 $ 158
Operating Lease, Liability, Statement of Financial Position [Extensible List] Other liabilities Other liabilities
Operating cash flows from operating leases $ (20) $ (18)
Weighted average remaining operating lease term 10 years 9 months 18 days 11 years 7 months 6 days
Weighted average discount rate on operating leases 4.08% 4.08%