Property and Casualty Insurance Reserves (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Property and Casulty Insurance Reserve - Gross of Reinsurance at Beginning of Year	$ 970.6	$ 1,029.1
Less Reinsurance and Indemnification Recoverables at Beginning of Year	66.2	74.5
Property and Casualty Insurance Reserves - Net of Reinsurance and Indemnification at Beginning of Year	904.4	954.6
Incurred Losses and LAE Related to Prior Years	(47.7)	(23.7)
Total Incurred Losses and LAE	763.4	901.3
Paid Losses and LAE Related to Prior Years	364.2	396.1
Total Paid Losses and LAE	850.0	941.1
Property and Casualty Insurance Reserves - Net of Reinsurance and Indemnification at End of Period	817.8	914.8
Plus Reinsurance and Indemnification Recoverabe at End of Period	66.8	67.0
Property and Casualty Insurance Reserves - Gross of Reinsurance at End of Period	884.6	981.8
Continuing Operations [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Incurred Losses and LAE Related to Current Year	811.1	925.0
Incurred Losses and LAE Related to Prior Years	(43.2)	(23.2)
Paid Losses and LAE Related to Current Year	485.8	545.0
Paid Losses and LAE Related to Prior Years	354.4	382.0
Discontinued Operations [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Incurred Losses and LAE Related to Prior Years	(4.5)	(0.5)
Paid Losses and LAE Related to Prior Years	9.8	14.1
Property and Casualty, Personal Insurance Product Line [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Incurred Losses and LAE Related to Prior Years	(41.2)	(10.4)
Property and Casualty, Commercial Insurance Product Line [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Incurred Losses and LAE Related to Prior Years	(6.5)	(13.3)
Property and Casualty, Commercial Insurance Product Line [Member] | Continuing Operations [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Incurred Losses and LAE Related to Prior Years	(2.0)	(12.8)
Property and Casualty, Commercial Insurance Product Line [Member] | Discontinued Operations [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Incurred Losses and LAE Related to Prior Years	(4.5)	(0.5)
Personal Automobile [Member] | Property and Casualty, Personal Insurance Product Line [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Incurred Losses and LAE Related to Prior Years	(22.6)	3.6
Homeowners [Member] | Property and Casualty, Personal Insurance Product Line [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Incurred Losses and LAE Related to Prior Years	(13.3)	(11.3)
Other Personal Lines [Member] | Property and Casualty, Personal Insurance Product Line [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Incurred Losses and LAE Related to Prior Years	$ (5.3)	$ (2.7)