Concentrations of Risk - Narrative (Details) - USD ($) $ in Billions |
12 Months Ended | |
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Dec. 31, 2024 |
Dec. 31, 2023 |
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| Private investors | ||
| Concentration Risk [Line Items] | ||
| Transfer of loans held-for-sale to portfolio loans | $ 1.1 | $ 1.1 |
| Private investors | Non-agency reverse mortgage loans | Credit Concentration Risk | ||
| Concentration Risk [Line Items] | ||
| Concentration risk (in percent) | 90.70% | 87.30% |
| Private investors | Loans held for sale - residential mortgage loans | Credit Concentration Risk | ||
| Concentration Risk [Line Items] | ||
| Concentration risk (in percent) | 9.30% | 12.70% |
| FNMA, FHLMC, and Ginnie Mae | ||
| Concentration Risk [Line Items] | ||
| Transfer of loans held-for-sale to portfolio loans | $ 1.0 | $ 1.1 |
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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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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Value of loans held-for-sale transferred to loans held in the entity's portfolio in noncash transactions. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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