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Future policy benefits (Weighted average interest rates) (Details) - Segment Life [Member] | Jun. 30, 2025 | Jun. 30, 2024
--- | --- | ---
Term Life Insurance |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Interest Accretion Rate | 3.00% | 2.90%
Current Discount Rate | 5.90% | 5.70%
Whole Life Insurance |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Interest Accretion Rate | 3.40% | 3.20%
Current Discount Rate | 3.90% | 4.60%
Accident and Health Insurance Product Line [Member] |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Interest Accretion Rate | 4.00% | 3.70%
Current Discount Rate | 5.80% | 6.30%
Insurance, Other |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Interest Accretion Rate | 3.20% | 2.70%
Current Discount Rate | 3.30% | 4.20%

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