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Income Taxes, Textuals (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Operating Loss Carryforwards [Line Items] |  |
Bad debt from acquired savings banks | $ 100 |
Deferred tax on bad debt from acquired savings banks | 25 |
Income Tax Examination, Penalties and Interest Expense | 0 | $ 0
State and Local Jurisdiction |  |
Operating Loss Carryforwards [Line Items] |  |
Operating Loss Carryforwards | 117 |
Operating tax loss carryforwards from acquisitions | $ 2 |
Operating Loss Carryforwards, Expiration Date | 2025 |

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- Definition The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-15 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-3 + Details
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