Future policy benefits and related reinsurance recoverable - Narrative (Details) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Insurance [Abstract] | ||
| Reinsurance assumed | $ 4.2 | |
| Increase in liability for future policy benefits | $ 3.0 | $ 13.0 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of increase (decrease) in expected future policy benefit and expense component for liability for future policy benefit. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount, after allowance for credit loss, recoverable under reinsurance of liability for future policy benefit. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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