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Financial Guaranty Variable Interest Entities and Consolidated Investment Vehicles - Number of Consolidated CIVs by Type (Details) (Details) - Consolidated Investment Vehicles	Dec. 31, 2022 consolidatedInvestmentFund	Dec. 31, 2022 consolidatedCLO	Dec. 31, 2022 cLOWarehouse	Dec. 31, 2022 consolidatedInvestmentVehicle	Dec. 31, 2022 Entity	Dec. 31, 2021 consolidatedInvestmentFund	Dec. 31, 2021 consolidatedCLO	Dec. 31, 2021 cLOWarehouse	Dec. 31, 2021 consolidatedInvestmentVehicle	Dec. 31, 2021 Entity	Dec. 31, 2020 Entity
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Total number of entities consolidated				22	22				20	20	11
Variable Interest Entity, Primary Beneficiary | Funds
Variable Interest Entity [Line Items]
Total number of entities consolidated | consolidatedInvestmentFund	8					8
Variable Interest Entity, Primary Beneficiary | CLO contracts
Variable Interest Entity [Line Items]
Total number of entities consolidated | consolidatedCLO		10					9
Variable Interest Entity, Primary Beneficiary | CLO warehouses
Variable Interest Entity [Line Items]
Total number of entities consolidated | cLOWarehouse			4					3
Voting Interest Entity
Variable Interest Entity [Line Items]
Total number of entities consolidated | consolidatedInvestmentVehicle				2					1

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- Definition

Variable Interest Entity, Number of Entities Consolidated

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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.

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No definition available.

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