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Financial Guaranty Variable Interest Entities and Consolidated Investment Vehicles - Number of Consolidated CIVs by Type (Details) - Variable Interest Entity, Primary Beneficiary - Consolidated Investment Vehicles | Jun. 30, 2022 consolidatedInvestmentVehicle | Jun. 30, 2022 consolidatedInvestmentFund | Jun. 30, 2022 consolidatedCLO | Jun. 30, 2022 cLOWarehouse | Jun. 30, 2022 Entity | Dec. 31, 2021 consolidatedInvestmentVehicle | Dec. 31, 2021 consolidatedInvestmentFund | Dec. 31, 2021 consolidatedCLO | Dec. 31, 2021 cLOWarehouse | Dec. 31, 2021 Entity | Jun. 30, 2021 Entity | Dec. 31, 2020 Entity
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Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total number of entities consolidated | 21 |  |  |  | 21 | 20 |  |  |  | 20 | 15 | 11
Investment Managed Funds |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total number of entities consolidated | consolidatedInvestmentFund |  | 9 |  |  |  |  | 8 |  |  |  |  |
Collateralized Loan Obligations |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total number of entities consolidated | consolidatedCLO |  |  | 10 |  |  |  |  | 9 |  |  |  |
Collateralized Loan Obligation Warehouses |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total number of entities consolidated | cLOWarehouse |  |  |  | 2 |  |  |  |  | 3 |  |  |

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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. + References No definition available. + Details
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