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Income Taxes (Tables) | 3 Months Ended
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Mar. 31, 2025
Income Tax Disclosure [Abstract] |
Differences Between Statutory Income Tax Rate And Effective Income Tax Rate | The differences between the 21% statutory federal income tax rate and our effective income tax rate were as follows:
(Dollars in millions) |  |  |  | Three months ended March 31,
|  |  |  |  |  | 2025 |  | 2024
Tax at statutory rate: |  |  |  |  |  |  |  |  |  | $ | (27) |  |  | 21.0 | % |  | $ | 200 |  |  | 21.0 | %
Increase (decrease) resulting from: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax-exempt income from municipal bonds |  |  |  |  |  |  |  |  |  | (5) |  |  | 3.9 |  |  | (5) |  |  | (0.5) |
Dividend received exclusion |  |  |  |  |  |  |  |  |  | (5) |  |  | 3.9 |  |  | (5) |  |  | (0.5) |
Other |  |  |  |  |  |  |  |  |  | (1) |  |  | 0.9 |  |  | 8 |  |  | 0.8 |
Provision (benefit) for income taxes |  |  |  |  |  |  |  |  |  | $ | (38) |  |  | 29.7 | % |  | $ | 198 |  |  | 20.8 | %

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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 231 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-231 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12A Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 + Details
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