v3.26.3
Insurance - Schedule of Weighted-Average Interest Rates for the Liability of Future Policy Benefits (Details)
Sep. 30, 2026
Sep. 30, 2025
Term and Whole Life    
Additional Liability, Long-Duration Insurance [Line Items]    
Interest accretion rate 5.29% 5.29%
Current discount rate 5.93% 4.98%
Accidental Death and Disability Protection    
Additional Liability, Long-Duration Insurance [Line Items]    
Interest accretion rate 4.85% 4.86%
Current discount rate 5.98% 5.14%