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Reserve for Future Policy Benefits and Contractholder Funds - Schedule of key assumptions used in calculating the reserve for future policy benefits (Details) | Jun. 30, 2023 | Jun. 30, 2022
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Accident and health insurance |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Weighted-average duration (in years) | 3 years 10 months 24 days | 4 years
Interest accretion rate (discount rate at contract issuance) | 5.08% | 5.46%
Current discount rate (upper-medium grade fixed income yield) | 4.79% | 3.66%
Traditional life |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Weighted-average duration (in years) | 14 years | 13 years
Interest accretion rate (discount rate at contract issuance) | 5.46% | 5.67%
Current discount rate (upper-medium grade fixed income yield) | 5.14% | 4.55%

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