Reserve for Future Policy Benefits and Contractholder Funds - Schedule of Key Assumptions used in Calculating the Reserve for Future Policy Benefits (Details)	Jun. 30, 2024	Jun. 30, 2023
Accident and health insurance
Liability for Future Policy Benefit, Activity [Line Items]
Weighted-average duration (in years)	8 years	3 years 10 months 24 days
Weighted-average interest rates
Interest accretion rate (discount rate at contract issuance)	5.04%	5.08%
Current discount rate (upper-medium grade fixed income yield)	5.26%	4.79%
Traditional life
Liability for Future Policy Benefit, Activity [Line Items]
Weighted-average duration (in years)	15 years 1 month 6 days	14 years
Weighted-average interest rates
Interest accretion rate (discount rate at contract issuance)	5.37%	5.46%
Current discount rate (upper-medium grade fixed income yield)	5.35%	5.14%