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Outstanding Exposure - Puerto Rico Net Par Outstanding (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Schedule of Insured Financial Obligations [Line Items] |  |
Net | $ 244,013 | $ 233,258
Puerto Rico |  |
Schedule of Insured Financial Obligations [Line Items] |  |
Net | 1,349 | 1,361
Puerto Rico | Puerto Rico Defaulted and Resolved Exposures Subject to a Plan Support Agreement |  |
Schedule of Insured Financial Obligations [Line Items] |  |
Net | 504 | 509
Puerto Rico | Puerto Rico Defaulted and Resolved Exposures Subject to a Plan Support Agreement | Puerto Rico Electric Power Authority |  |
Schedule of Insured Financial Obligations [Line Items] |  |
Net | 720 | 720
Puerto Rico | Puerto Rico Defaulted and Resolved Exposures Subject to a Plan Support Agreement | Puerto Rico Transportation Authority |  |
Schedule of Insured Financial Obligations [Line Items] |  |
Net | 293 | 298
Puerto Rico | Puerto Rico Defaulted and Resolved Exposures Subject to a Plan Support Agreement | Puerto Rico Highways Authority |  |
Schedule of Insured Financial Obligations [Line Items] |  |
Net | 182 | 182
Puerto Rico | Puerto Rico Defaulted and Resolved Exposures Subject to a Plan Support Agreement | Commonwealth of Puerto Rico |  |
Schedule of Insured Financial Obligations [Line Items] |  |
Net | 25 | 25
Puerto Rico | Puerto Rico Defaulted and Resolved Exposures Subject to a Plan Support Agreement | PBA |  |
Schedule of Insured Financial Obligations [Line Items] |  |
Net | 4 | 4
Puerto Rico | Other Puerto Rico Exposure |  |
Schedule of Insured Financial Obligations [Line Items] |  |
Net | 125 | 132
Puerto Rico | Other Puerto Rico Exposure | MFA |  |
Schedule of Insured Financial Obligations [Line Items] |  |
Net | 124 | 131
Puerto Rico | Other Puerto Rico Exposure | PRASA and U of PR |  |
Schedule of Insured Financial Obligations [Line Items] |  |
Net | $ 1 | $ 1

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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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