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Investments Investments - Debt Service and Fixed Charge Coverage Ratios (Details) $ in Millions | Dec. 31, 2019 USD ($)
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Commercial mortgage loans |
Loans and Leases Receivable Disclosure [Line Items] |
Fair market value, trading | $ 156.6
Middle market loans |
Loans and Leases Receivable Disclosure [Line Items] |
Fair market value, trading | 111.7
Greater than 1.20x | Commercial mortgage loans |
Loans and Leases Receivable Disclosure [Line Items] |
Fair market value, trading | 94.6
Greater than 1.20x | Middle market loans |
Loans and Leases Receivable Disclosure [Line Items] |
Fair market value, trading | 68.4
1.00 - 1.20x | Commercial mortgage loans |
Loans and Leases Receivable Disclosure [Line Items] |
Fair market value, trading | 48.3
1.00 - 1.20x | Middle market loans |
Loans and Leases Receivable Disclosure [Line Items] |
Fair market value, trading | 25.5
Less than 1.00x | Commercial mortgage loans |
Loans and Leases Receivable Disclosure [Line Items] |
Fair market value, trading | 13.7
Less than 1.00x | Middle market loans |
Loans and Leases Receivable Disclosure [Line Items] |
Fair market value, trading | $ 17.8

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