Commitments and Contingencies (Restricted Assets) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Loss Contingencies [Line Items]
Other fixed maturities-state deposits	$ 13.1		$ 13.4
Securities pledged	140.1	[1]	219.7	[1]
Total restricted assets	153.2		233.1
Fair value of loaned securities	97.6		180.2
Securities pledged as collateral	140.1		219.7
Fixed maturities
Loss Contingencies [Line Items]
Securities pledged as collateral	$ 42.5		$ 39.5

[1] Includes the fair value of loaned securities of $97.6 and $180.2 as of December 31, 2013 and 2012, respectively, which is included in Securities pledged on the Consolidated Balance Sheets. In addition, as of December 31, 2013 and 2012, the Company delivered securities as collateral of $42.5 and $39.5, respectively, which was included in Securities pledged on the Consolidated Balance Sheets.