v3.26.1
Future Policy Benefits - Weighted-average interest rates (Details)
Mar. 31, 2026
Mar. 31, 2025
Individual Retirement    
Liability for Future Policy Benefit, Activity [Line Items]    
Weighted-average interest rate, original discount rate 3.98% 3.85%
Weighted-average interest rate, current discount rate 5.42% 5.31%
Group Retirement    
Liability for Future Policy Benefit, Activity [Line Items]    
Weighted-average interest rate, original discount rate 5.20% 5.29%
Weighted-average interest rate, current discount rate 5.24% 5.22%
Life Insurance    
Liability for Future Policy Benefit, Activity [Line Items]    
Weighted-average interest rate, original discount rate 4.70% 4.70%
Weighted-average interest rate, current discount rate 5.65% 5.51%
Life Insurance | Universal Life    
Liability for Future Policy Benefit, Activity [Line Items]    
Weighted-average interest rate, current discount rate 3.93% 4.08%
Institutional Markets    
Liability for Future Policy Benefit, Activity [Line Items]    
Weighted-average interest rate, original discount rate 4.59% 4.31%
Weighted-average interest rate, current discount rate 5.98% 5.68%
Corporate & Other    
Liability for Future Policy Benefit, Activity [Line Items]    
Weighted-average interest rate, original discount rate 4.87% 4.87%
Weighted-average interest rate, current discount rate 5.65% 5.48%
Corporate & Other | Universal Life    
Liability for Future Policy Benefit, Activity [Line Items]    
Weighted-average interest rate, current discount rate 4.20% 4.20%