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Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Financing Receivable, Allowance for Credit Losses |  |  |  |  |
Percent of Loans Held for Investment | 100.00% | 100.00% | 100.00% | 100.00% |
Impairment expense | $ 31 | $ 46 |  |  |
Warrants exercise price (in usd per share) | $ 7.50 | $ 7.50 | $ 7.50 |  |
Warrant outstanding (in shares) |  |  | 105 |  |
Preferred stock, par value (in usd per share) | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01
Premises |  |  |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |  |  |
Estimated useful lives | 20 years | 20 years | 20 years |  |
Furniture, fixtures and equipment, and building improvements |  |  |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |  |  |
Estimated useful lives | 13 years 6 months | 13 years 6 months | 13 years 6 months |  |
Furniture, fixtures and equipment, and building improvements | Minimum |  |  |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |  |  |
Estimated useful lives | 3 years | 3 years | 3 years |  |
Furniture, fixtures and equipment, and building improvements | Maximum |  |  |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |  |  |
Estimated useful lives | 10 years | 10 years | 10 years |  |

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- Definition Percentage, before allowance for credit loss, of financing receivable to total financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph c -Publisher SEC + Details
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