Insurance Expenses (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Insurance Expenses [Abstract]
Commissions									$ 366.1	$ 363.5	$ 358.8
General Expenses									262.9	270.1	273.5
Taxes, Licenses and Fees									44.7	46.4	47.3
Total Costs Incurred									673.7	680.0	679.6
Policy Acquisition Costs:
Deferred									(266.4)	(268.5)	(276.9)
Amortized									257.0	260.7	272.2
Net Policy Acquisition Costs Deferred									(9.4)	(7.8)	(4.7)
Life VIF and P&C Customer Relationships Amortized									8.0	11.4	11.0
Insurance Expenses	$ 169.5	$ 172.7	$ 167.7	$ 162.4	$ 170.1	$ 176.8	$ 170.6	$ 166.1	$ 672.3	$ 683.6	$ 685.9