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Schedule of Participating Mortgage Loans by Internal Credit Rating and Loan to Value (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
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Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 2,490.7 | $ 2,560.4
Loan to Value Ratio Below or Equal to 65 Percent |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 1,296.3 | $ 1,346.1
Mortgage Loans, Percent of Total | 52.10% | 52.60%
Loan To Value Ratio Above 65 To 75 Percent |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 1,091.4 | $ 1,076.8
Mortgage Loans, Percent of Total | 43.80% | 42.00%
Loan To Value Ratio Above 75 To 85 Percent |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 90.8 | $ 114.9
Mortgage Loans, Percent of Total | 3.60% | 4.50%
Loan To Value Ratio Above 85 Percent |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 12.2 | $ 22.6
Mortgage Loans, Percent of Total | 0.50% | 0.90%
Total |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Percent of Total | 100.00% | 100.00%
AA Credit Rating |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 30.2 | $ 27.3
Mortgage Loans, Percent of Total | 1.20% | 1.10%
A Credit Rating |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 696.8 | $ 709.6
Mortgage Loans, Percent of Total | 28.00% | 27.70%
BBB Credit Rating |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 1,743.3 | $ 1,802.6
Mortgage Loans, Percent of Total | 70.00% | 70.40%
BB Credit Rating |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 20.4 | $ 20.9
Mortgage Loans, Percent of Total | 0.80% | 0.80%
Total |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Percent of Total | 100.00% | 100.00%

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- Definition The balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(c)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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