Future Policy Benefits Reserves - Earned Premiums and Interest Expense (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Insurance [Abstract] | ||||
| Earned premiums | $ 101 | $ 106 | $ 307 | $ 318 |
| Interest accretion | $ 188 | $ 185 | $ 558 | $ 555 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of gross premium income recognized for liability for future policy benefit. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of interest expense recognized for liability for future policy benefit. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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