Schedule V - Valuation and Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Reserve for unrecoverable reinsurance [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 21.2		$ 28.2		$ 28.2
Charged to Cost and Expenses	0		0		0
Charged to Other Accounts - Describe	0		0		0
Deductions - Describe	0		(7.0)		0
Balance at End of Period	21.2		21.2		28.2
Deferred tax asset valuation Allowance [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	9.6	[1]	12.2	[1]	13.5	[1]
Charged to Cost and Expenses	0	[1]	0	[1]	0	[1]
Charged to Other Accounts - Describe	0	[1]	0	[1]	0	[1]
Deductions - Describe	0	[1]	(2.5)	[1]	(1.3)	[1]
Balance at End of Period	$ 9.6	[1]	$ 9.6	[1]	$ 12.2	[1]

[1] (1) A valuation allowance was established against deferred tax assets as of December 31, 2013, 2012 and 2011 related to certain net operating loss and tax credit carryforwards which the Company did not expect to realize. In valuing the deferred tax assets, the Company considered certain factors including primarily the scheduled reversals of certain deferred tax liabilities, estimates of future taxable income, the impact of available carryback and carryforward periods, as well as the availability of certain tax planning strategies. The Company estimates that all remaining deferred tax assets at year end 2013 will more likely than not be fully realized.