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Financial Guaranty Variable Interest Entities and Consolidated Investment Vehicles - Consolidated FG VIE's By Type of Collateral (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023 | Jun. 30, 2023
--- | --- | --- | ---
Variable Interest Entity [Line Items] |  |  |
Assets | $ 12,088 | $ 12,539 |
Liabilities | 6,493 | 6,774 |
Cash | 92 | 97 | $ 114
Variable Interest Entity, Primary Beneficiary | Recourse | Financial Guaranty Variable Interest Entities |  |  |
Variable Interest Entity [Line Items] |  |  |
Liabilities | 383 | 543 |
Variable Interest Entity, Primary Beneficiary | Nonrecourse | Financial Guaranty Variable Interest Entities |  |  |
Variable Interest Entity [Line Items] |  |  |
Liabilities | 10 | 11 |
Variable Interest Entity, Primary Beneficiary | Puerto Rico Trusts | Recourse | Financial Guaranty Variable Interest Entities |  |  |
Variable Interest Entity [Line Items] |  |  |
Liabilities | 219 | 366 |
Variable Interest Entity, Primary Beneficiary | United States | RMBS | First Lien | Recourse | Financial Guaranty Variable Interest Entities |  |  |
Variable Interest Entity [Line Items] |  |  |
Liabilities | 145 | 156 |
Variable Interest Entity, Primary Beneficiary | United States | RMBS | First Lien | Nonrecourse | Financial Guaranty Variable Interest Entities |  |  |
Variable Interest Entity [Line Items] |  |  |
Liabilities | 10 | 11 |
Variable Interest Entity, Primary Beneficiary | United States | RMBS | Second Lien | Recourse | Financial Guaranty Variable Interest Entities |  |  |
Variable Interest Entity [Line Items] |  |  |
Liabilities | 19 | 21 |
Financial Guaranty Variable Interest Entities | Variable Interest Entity, Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Assets | 160 | 328 |
Financial Guaranty Variable Interest Entities | Variable Interest Entity, Primary Beneficiary | Puerto Rico Trusts |  |  |
Variable Interest Entity [Line Items] |  |  |
Assets | 2 | 155 |
Total assets carried at fair value | 2 | 1 |
Cash |  | 154 |
Financial Guaranty Variable Interest Entities | Variable Interest Entity, Primary Beneficiary | United States | RMBS | First Lien |  |  |
Variable Interest Entity [Line Items] |  |  |
Assets | 133 | 145 |
Financial Guaranty Variable Interest Entities | Variable Interest Entity, Primary Beneficiary | United States | RMBS | Second Lien |  |  |
Variable Interest Entity [Line Items] |  |  |
Assets | $ 25 | $ 28 |

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