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LIABILITIES FOR INSURANCE PRODUCTS - WEIGHTED AVERAGE DURATIONS OF LIABILITY (Details)
Sep. 30, 2023
Sep. 30, 2022
Other annuities    
Liability for Future Policy Benefit, Activity [Line Items]    
Weighted average duration 9 years 8 months 12 days 9 years 8 months 12 days
Supplemental health    
Liability for Future Policy Benefit, Activity [Line Items]    
Weighted average duration 11 years 8 months 12 days 12 years
Medicare supplement    
Liability for Future Policy Benefit, Activity [Line Items]    
Weighted average duration 6 years 6 years 1 month 6 days
Long-term care    
Liability for Future Policy Benefit, Activity [Line Items]    
Weighted average duration 10 years 3 months 18 days 10 years 8 months 12 days
Traditional life    
Liability for Future Policy Benefit, Activity [Line Items]    
Weighted average duration 10 years 4 months 24 days 10 years 9 months 18 days