Variable Interest Entities (Summary of Unconsolidated Tax Structures) (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
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| Variable Interest Entity [Line Items] | ||
| Investment Carrying Amount | $ 846.5 | $ 876.7 |
| Unfunded Commitments | 193.2 | 227.1 |
| Affordable Housing | ||
| Variable Interest Entity [Line Items] | ||
| Investment Carrying Amount | 618.2 | 657.0 |
| Unfunded Commitments | 193.2 | 227.1 |
| New Markets | ||
| Variable Interest Entity [Line Items] | ||
| Investment Carrying Amount | 228.3 | 219.7 |
| Unfunded Commitments | 0.0 | 0.0 |
| Variable Interest Entity, Not Primary Beneficiary | ||
| Variable Interest Entity [Line Items] | ||
| Investment Carrying Amount | 821.7 | 849.3 |
| Unfunded Commitments | $ 189.9 | $ 221.0 |
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- Definition Amount of investment that generates income tax credit and other income tax benefit under tax credit program elected to be accounted for using proportional amortization method. Includes, but is not limited to, investment under program not meeting condition for accounting under proportional amortization method. Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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- Definition Amount of commitment and contingent commitment, including amount of delayed equity contribution, for investment that generates income tax credit and other income tax benefit under tax credit program elected to be accounted for using proportional amortization method. Includes, but is not limited to, commitment and contingent commitment related to investment under tax credit program not meeting condition for accounting under proportional amortization method. Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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