Additional Insurance Liabilities - Schedule of Additional Liability Long Duration Insurance Revenue and Interest Accretion (Expense) Recognized (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
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| Insurance [Abstract] | |||
| Gross assessments | $ 127 | $ 132 | $ 513 |
| Interest accretion | $ 26 | $ 25 | $ 102 |
| X | ||||||||||
- Definition Amount of gross premium income recognized for present value of total expected payment to policyholder in excess of present value of total expected assessment. Excludes benefit classified as market risk benefit or under provisions of Topic 815 on derivative and hedging. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of interest income (expense) for present value of total expected payment to policyholder in excess of present value of total expected assessment. Excludes benefit classified as market risk benefit or under provisions of Topic 815 on derivative and hedging. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- References No definition available.
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