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Schedule of Participating Mortgage Loans by Internal Credit Rating and Loan to Value (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
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Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 2,261.1 | $ 2,318.2
Mortgage Loans, Percent of Total | 100.00% | 100.00%
Loan to Value Ratio Below or Equal to 65 Percent |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 1,485.8 | $ 1,409.9
Mortgage Loans, Percent of Total | 65.70% | 60.80%
Loan To Value Ratio Above 65 To 75 Percent |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 588.7 | $ 707.0
Mortgage Loans, Percent of Total | 26.00% | 30.50%
Loan To Value Ratio Above 75 To 85 Percent |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 116.5 | $ 136.5
Mortgage Loans, Percent of Total | 5.20% | 5.90%
Loan To Value Ratio Above 85 Percent |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 70.1 | $ 64.8
Mortgage Loans, Percent of Total | 3.10% | 2.80%
AA Credit Rating |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 83.6 | $ 85.2
Mortgage Loans, Percent of Total | 3.70% | 3.70%
A Credit Rating |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 988.6 | $ 942.5
Mortgage Loans, Percent of Total | 43.80% | 40.60%
BBB Credit Rating |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 1,133.8 | $ 1,249.5
Mortgage Loans, Percent of Total | 50.10% | 53.90%
BB Credit Rating |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 55.1 | $ 41.0
Mortgage Loans, Percent of Total | 2.40% | 1.80%

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