v3.25.1
Mortgage Loans, Allowance for Credit Losses Rollforward (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Financing Receivable, Allowance for Credit Loss    
Financing Receivable, Allowance for Credit Loss, Beginning Balance $ 16.1  
Financing Receivable, Allowance for Credit Loss, Ending Balance 16.6  
Commercial Real Estate    
Financing Receivable, Allowance for Credit Loss    
Financing Receivable, Allowance for Credit Loss, Beginning Balance [1] 16.1 $ 10.2
Current Period Provisions [1] 0.5 0.5
Write-offs [1] 0.0 0.0
Recoveries [1] 0.0 0.0
Financing Receivable, Allowance for Credit Loss, Ending Balance [1] 16.6 10.7
Commercial Real Estate | Loan to Value Ratio Below or Equal to 65 Percent    
Financing Receivable, Allowance for Credit Loss    
Financing Receivable, Allowance for Credit Loss, Beginning Balance [1] 4.2 3.8
Current Period Provisions [1] (0.4) (0.2)
Write-offs [1] 0.0 0.0
Recoveries [1] 0.0 0.0
Financing Receivable, Allowance for Credit Loss, Ending Balance [1] 3.8 3.6
Commercial Real Estate | Loan To Value Ratio Above 65 To 75 Percent    
Financing Receivable, Allowance for Credit Loss    
Financing Receivable, Allowance for Credit Loss, Beginning Balance [1] 1.7 3.8
Current Period Provisions [1] 0.0 (0.4)
Write-offs [1] 0.0 0.0
Recoveries [1] 0.0 0.0
Financing Receivable, Allowance for Credit Loss, Ending Balance [1] 1.7 3.4
Commercial Real Estate | Loan To Value Ratio Above 75 To 85 Percent    
Financing Receivable, Allowance for Credit Loss    
Financing Receivable, Allowance for Credit Loss, Beginning Balance [1] 2.2 1.2
Current Period Provisions [1] 0.9 0.0
Write-offs [1] 0.0 0.0
Recoveries [1] 0.0 0.0
Financing Receivable, Allowance for Credit Loss, Ending Balance [1] 3.1 1.2
Commercial Real Estate | Loan To Value Ratio Above 85 Percent    
Financing Receivable, Allowance for Credit Loss    
Financing Receivable, Allowance for Credit Loss, Beginning Balance [1] 8.0 1.4
Current Period Provisions [1] 0.0 1.1
Write-offs [1] 0.0 0.0
Recoveries [1] 0.0 0.0
Financing Receivable, Allowance for Credit Loss, Ending Balance [1] $ 8.0 $ 2.5
[1]
1Loan-to-Value Ratio utilizes the most recent internal valuation of the property