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Financial Guaranty Variable Interest Entities and Consolidated Investment Vehicles - Additional Information (Details) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 USD ($) Entity entity consolidatedInvestmentVehicle policy | Mar. 31, 2021 USD ($) | Dec. 31, 2021 USD ($) Entity policy consolidatedInvestmentVehicle
Variable Interest Entity [Line Items] |  |  |
Liabilities | $ 11,829,000,000 |  | $ 11,708,000,000
Estimated Fair Value | 8,156,000,000 |  | 8,202,000,000
Fixed-maturity securities, trading | 174,000,000 |  | 0
Net fair value gains and losses on FG VIEs are expected to reverse to zero at maturity of the VIE debt | 1,000,000 |  | 1,000,000
Fair value gains (losses) on credit derivatives | (3,000,000) | $ (19,000,000) |
Other consolidated VIE assets | 92,000,000 |  | 96,000,000
Other consolidated VIE liabilities | $ 12,000,000 |  | $ 11,000,000
Number of policies monitored | policy | 16,000 |  |
Number of policies monitored, not within the scope of ASC 810 | policy | 14,000 |  |
Number of policies that contain provisions for consolidation | policy | 63 |  | 69
Joint Healthcare Fund | Line of Credit |  |  |
Variable Interest Entity [Line Items] |  |  |
Maximum borrowing capacity | $ 80,000,000 |  |
Long-term line of credit | 15,000,000 |  |
Consolidated Healthcare Fund | Line of Credit |  |  |
Variable Interest Entity [Line Items] |  |  |
Maximum borrowing capacity | $ 48,000,000 |  |
Prime Rate | Joint Healthcare Fund | Line of Credit |  |  |
Variable Interest Entity [Line Items] |  |  |
Base interest rate floor | 3.00% |  |
EURIBOR | Joint Healthcare Fund | Line of Credit |  |  |
Variable Interest Entity [Line Items] |  |  |
Base interest rate floor | 0.00% |  |
London Interbank Offered Rate (LIBOR) | Joint Healthcare Fund | Line of Credit |  |  |
Variable Interest Entity [Line Items] |  |  |
Base interest rate floor | 0.00% |  |
Financial Guaranty Variable Interest Entities |  |  |
Variable Interest Entity [Line Items] |  |  |
Maximum loss exposure | $ 0 |  |
Financial Guaranty Variable Interest Entities | Variable Interest Entity, Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Total number of entities consolidated | Entity | 26 |  | 25
Change in the instrument specific credit risk of the VIEs' assets | $ (5,000,000) | (3,000,000) |
Financial Guaranty Variable Interest Entities | Puerto Rico | Variable Interest Entity, Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Estimated Fair Value | 45,000,000 |  |
Amortized Cost | 48,000,000 |  |
Fixed-maturity securities, trading | 8,000,000 |  |
Initial consolidation, gain (loss) | $ 4,000,000 |  |
Puerto Rico Trusts [Line Items] | Variable Interest Entity, Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Total number of entities consolidated | entity | 9 |  |
Custody receipts, notice period | 30 days |  |
Consolidated Investment Vehicles |  |  |
Variable Interest Entity [Line Items] |  |  |
Number of entities consolidated that meets VOE criteria | consolidatedInvestmentVehicle | 1 |  | 1
Collateral posting requirement | $ 68,000,000 |  | $ 49,000,000
Fair value gains (losses) on credit derivatives | 4,000,000 | $ 2,000,000 |
Consolidated Investment Vehicles | Variable Interest Entity, Primary Beneficiary | Line of Credit |  |  |
Variable Interest Entity [Line Items] |  |  |
Maximum borrowing capacity | 1,000,000,000 |  |
Remaining borrowing capacity | 591,000,000 |  |
Long-term line of credit | $ 310,000,000 |  |
Consolidated Investment Vehicles | EURIBOR | Variable Interest Entity, Primary Beneficiary | Line of Credit |  |  |
Variable Interest Entity [Line Items] |  |  |
Basis spread on variable rate | 1.00% |  |
Consolidated Investment Vehicles | London Interbank Offered Rate (LIBOR) | Variable Interest Entity, Primary Beneficiary | Line of Credit |  |  |
Variable Interest Entity [Line Items] |  |  |
Basis spread on variable rate | 1.00% |  |
Consolidated Investment Vehicles | Maximum | Future Equity Investments |  |  |
Variable Interest Entity [Line Items] |  |  |
Committed capital | $ 345,000,000 |  |
Consolidated Investment Vehicles | Average |  |  |
Variable Interest Entity [Line Items] |  |  |
Collateral posting requirement | $ 59,000,000 |  | $ 34,000,000

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- Details
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