Contracts Accounted for as Insurance - Net Earned Premiums (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
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| Insurance [Abstract] | ||||
| Scheduled net earned premiums | $ 75 | $ 72 | $ 151 | $ 143 |
| Accelerations from refundings and terminations | 4 | 3 | 9 | 42 |
| Accretion of discount on net premiums receivable | 9 | 8 | 18 | 15 |
| Financial guaranty insurance net earned premiums | 88 | 83 | 178 | 200 |
| Specialty net earned premiums | 1 | 1 | 2 | 3 |
| Net earned premiums | $ 89 | $ 84 | $ 180 | $ 203 |
| X | ||||||||||
- Definition This element represents the accretion of the discount for premiums receivable, net of ceded contracts, on financial guaranty insurance contracts. No definition available.
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- Definition Financial Guarantee Insurance Contracts, Premiums Earned, Net No definition available.
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- Definition Represents the amount of premium revenue on financial guaranty insurance contracts recognized during the period, excluding acceleration of premium earnings and accretion of discount on net premium receivable. No definition available.
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- Definition Premiums Earned, Net, Specialty Insurance and Reinsurance No definition available.
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- Definition This element represents the amount of premium revenue on financial guarantee insurance contracts recognized during the period that was accelerated for revenue recognition purposes. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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| X | ||||||||||
- Definition Amount, after premiums ceded to other entities and premiums assumed by the entity, of premiums earned. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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