Federal Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions |
12 Months Ended | |
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Dec. 31, 2024 |
Dec. 31, 2023 |
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| Unrecognized Tax Benefits [Roll Forward] | ||
| Balance as of beginning-of-year | $ 87 | $ 68 |
| Decreases for prior year tax positions | (48) | (6) |
| Increases for prior year tax positions | 0 | 25 |
| Balance as of end-of-year | $ 39 | $ 87 |
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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