Consolidated Balance Sheets Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Amortized Cost of Fixed Maturity Securities	$ 6,284.5	$ 5,021.6
Equity Securities at Cost	0.0	476.2
Fair Value of Notes Payable	$ 911.2	$ 614.6
Common Stock, Par Value	$ 0.1	$ 0.1
Common Stock, Shares Authorized	100,000,000	100,000,000
Common Stock, Shares Issued	64,756,833	51,462,405
Common Stock, Shares Outstanding	64,756,833	51,462,405