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Federal Income Taxes (Reconciliation Of The Effective Tax Rate Differences) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Reconciliation of effective tax rate differences [Abstract] |  |  |
Income (loss) before taxes | $ (2,811) | $ 1,638 | $ 423
Federal statutory rate | 21.00% | 21.00% | 21.00%
Federal income tax expense (benefit) at federal statutory rate | $ (590) | $ 344 | $ 89
Effect of: |  |  |
Tax-preferred investment income | (90) | (88) | (98)
Tax credits | (42) | (26) | (39)
Excess tax benefits from share-based compensation | (1) |  | 3
Goodwill impairment | 133 |  |
Tax impact associated with the Tax Cuts and Jobs Act |  |  | (37)
Other items | 6 | 3 | 6
Federal income tax expense (benefit) | $ (584) | $ 233 | $ (76)
Effective tax rate | 21.00% | 14.00% | (18.00%)

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