Future policy benefits (Weighted average interest rates) (Details) - Segment Life [Member] |
Sep. 30, 2026 |
Sep. 30, 2025 |
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| Term Life Insurance | ||
| Liability for Future Policy Benefit, Activity [Line Items] | ||
| Interest Accretion Rate | 3.20% | 3.00% |
| Current Discount Rate | 6.40% | 5.70% |
| Whole Life Insurance | ||
| Liability for Future Policy Benefit, Activity [Line Items] | ||
| Interest Accretion Rate | 3.60% | 3.40% |
| Current Discount Rate | 4.40% | 4.10% |
| Accident and Health Insurance Product Line [Member] | ||
| Liability for Future Policy Benefit, Activity [Line Items] | ||
| Interest Accretion Rate | 4.20% | 4.20% |
| Current Discount Rate | 6.70% | 5.80% |
| Insurance, Other | ||
| Liability for Future Policy Benefit, Activity [Line Items] | ||
| Interest Accretion Rate | 3.10% | 3.30% |
| Current Discount Rate | 3.40% | 3.50% |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Current weighted-average discount rate used to measure liability for future policy benefit. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Original weighted-average discount rate at contract issue date used to measure liability for future policy benefit. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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