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Investments Investments - Schedule of Other Investments (Details) - USD ($)
$ in Millions
Jun. 30, 2015
Dec. 31, 2014
Investments Disclosures [Abstract]    
Loans to Policyholders at Unpaid Principal $ 284.8 $ 283.4
Real Estate at Depreciated Cost 159.1 160.9
Trading Securities at Fair Value 5.0 4.9
Other 2.1 0.4
Total $ 451.0 $ 449.6