Consolidated Balance Sheets Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Amortized Cost of Fixed Maturity Securities	$ 4,370.5	$ 4,283.8
Equity Securities at Cost	530.0	462.7
Fair Value of Notes Payable	$ 667.1	$ 675.5
Common Stock, Par Value	$ 0.1	$ 0.1
Common Stock, Shares Authorized	100,000,000	100,000,000
Common Stock, Shares Issued	55,653,437	58,454,390
Common Stock, Shares Outstanding	55,653,437	58,454,390