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Investments - Other Investments Carrying Values (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]    
Loans to Policyholders at Unpaid Principal $ 305.6 $ 300.6
Real Estate at Depreciated Cost 111.4 114.2
Mortgage Loans 27.5 0.0
Total Investments $ 444.5 $ 414.8