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Other Insurance Liabilities and Separate Accounts - Weighted-average Interest Rates and Durations (Details)
Jun. 30, 2025
Jun. 30, 2024
Large Case Pensions    
Liability for Future Policy Benefit, Activity [Line Items]    
Interest accretion rate 4.20% 4.20%
Current discount rate 5.24% 5.42%
Weighted-average duration of long-duration insurance liabilities 7 years 2 months 12 days 7 years 3 months 18 days
Long-Term Care    
Liability for Future Policy Benefit, Activity [Line Items]    
Interest accretion rate 5.11% 5.11%
Current discount rate 5.59% 5.57%
Weighted-average duration of long-duration insurance liabilities 11 years 4 months 24 days 11 years 10 months 24 days