Property and Casualty Insurance Reserves (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Property and Casulty Insurance Reserve - Gross of Reinsurance at Beginning of Year	$ 733.9	$ 843.5
Less Reinsurance Recoverables at Beginning of Year	54.9	63.4
Property and Casualty Insurance Reserves - Net of Reinsurance at Beginning of Year	679.0	780.1
Property and Casualty Insurance Reserves Acquired, Net of Reinsurance and Indemnification				$ 125.4		$ 0.0
Incurred Losses and LAE Related to Prior Years	(13.9)	(34.3)
Total Incurred Losses and LAE	487.3	496.9
Paid Losses and LAE Related to Prior Years	233.9	237.7
Total Paid Losses and LAE	498.0	522.9
Property and Casualty Insurance Reserves - Net of Reinsurance at End of Period	679.0	780.1	$ 793.7	$ 679.0	$ 754.1	$ 780.1
Plus Reinsurance Recoverables at End of Period	80.7	61.1
Property and Casualty Insurance Reserves - Gross of Reinsurance at End of Period	874.4	815.2
Continuing Operations [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Incurred Losses and LAE Related to Current Year	501.2	531.2
Incurred Losses and LAE Related to Prior Years	(10.4)	(34.2)
Paid Losses and LAE Related to Current Year	264.1	285.2
Paid Losses and LAE Related to Prior Years	230.2	233.0
Discontinued Operations [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Incurred Losses and LAE Related to Prior Years	(3.5)	(0.1)
Paid Losses and LAE Related to Prior Years	3.7	4.7
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	(9.5)	(34.1)
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	(4.4)	(0.2)
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	(0.9)	(0.1)
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	(3.5)	(0.1)
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	(6.4)	(23.5)
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	(4.6)	(8.8)
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	$ 1.4	$ (1.8)