v3.25.2
Fair Value of Financial Instruments - Financial Instrument Not Carried at Fair Value (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Level 1    
Investments    
Other investments $ 0.0 $ 0.0
Deposit asset on reinsurance 0.0 0.0
Financial Liabilities    
Policyholders' account balances 0.0 0.0
Reverse repurchase agreement   0.0
Other policyholder funds 0.0 0.0
Long-term debt 0.0 0.0
Level 2    
Investments    
Other investments 37.5 37.0
Deposit asset on reinsurance 0.0 0.0
Financial Liabilities    
Policyholders' account balances 0.0 0.0
Reverse repurchase agreement   12.4
Other policyholder funds 1,002.9 992.9
Long-term debt 577.1 575.1
Level 3    
Investments    
Other investments 185.4 187.3
Deposit asset on reinsurance 2,145.2 2,121.9
Financial Liabilities    
Policyholders' account balances 4,726.0 4,710.1
Reverse repurchase agreement   0.0
Other policyholder funds 2.9 2.8
Long-term debt 0.0 0.0
Carrying Amount    
Investments    
Other investments 219.7 221.0
Deposit asset on reinsurance 2,412.6 2,434.3
Financial Liabilities    
Policyholders' account balances 5,090.9 5,020.2
Reverse repurchase agreement   12.0
Other policyholder funds 1,005.8 995.7
Long-term debt 547.5 547.0
Fair Value    
Investments    
Other investments 222.9 224.3
Deposit asset on reinsurance 2,145.2 2,121.9
Financial Liabilities    
Policyholders' account balances 4,726.0 4,710.1
Reverse repurchase agreement   12.4
Other policyholder funds 1,005.8 995.7
Long-term debt $ 577.1 $ 575.1