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Outstanding Exposure - Puerto Rico Net Par Outstanding (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Aug. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Schedule of Insured Financial Obligations [Line Items] |  |  |
Net | $ 241,833 | $ 108 | $ 233,258
Puerto Rico |  |  |
Schedule of Insured Financial Obligations [Line Items] |  |  |
Net | 1,105 |  | 1,361
Puerto Rico | Other Puerto Rico Exposure |  |  |
Schedule of Insured Financial Obligations [Line Items] |  |  |
Net | 109 |  | 132
Puerto Rico | Other Puerto Rico Exposure | MFA |  |  |
Schedule of Insured Financial Obligations [Line Items] |  |  |
Net | 108 |  | 131
Puerto Rico | Other Puerto Rico Exposure | PRASA and U of PR |  |  |
Schedule of Insured Financial Obligations [Line Items] |  |  |
Net | 1 |  | 1
Puerto Rico | Puerto Rico Defaulted Exposures Subject to a Plan Support Agreement | Puerto Rico Electric Power Authority |  |  |
Schedule of Insured Financial Obligations [Line Items] |  |  |
Net | 624 |  | 720
Puerto Rico | Puerto Rico Resolved Exposures Subject to a Plan Support Agreement |  |  |
Schedule of Insured Financial Obligations [Line Items] |  |  |
Net | 372 |  | 509
Puerto Rico | Puerto Rico Resolved Exposures Subject to a Plan Support Agreement | Puerto Rico Transportation Authority |  |  |
Schedule of Insured Financial Obligations [Line Items] |  |  |
Net | 244 |  | 298
Puerto Rico | Puerto Rico Resolved Exposures Subject to a Plan Support Agreement | Puerto Rico Highways Authority |  |  |
Schedule of Insured Financial Obligations [Line Items] |  |  |
Net | 128 |  | 182
Puerto Rico | Puerto Rico Resolved Exposures Subject to a Plan Support Agreement | Commonwealth of Puerto Rico |  |  |
Schedule of Insured Financial Obligations [Line Items] |  |  |
Net | 0 |  | 25
Puerto Rico | Puerto Rico Resolved Exposures Subject to a Plan Support Agreement | PBA |  |  |
Schedule of Insured Financial Obligations [Line Items] |  |  |
Net | $ 0 |  | $ 4

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- Definition Represents the outstanding principal amounts of the underlying insured obligations for financial guaranty contracts, after netting out ceded contracts. + References No definition available. + Details
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