Condensed Consolidated Statements of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues:
Earned Premiums	$ 527.3	$ 543.0	$ 1,586.3	$ 1,637.1
Net Investment Income	70.4	58.6	223.0	222.7
Other Income	0.2	0.4	0.6	0.8
Net Realized Gains (Losses) on Sales of Investments	50.9	(4.2)	59.9	27.8
Other-than-temporary Impairment Losses:
Total Other-than-temporary Impairment Losses	(3.2)	(5.0)	(4.1)	(6.7)
Portion of Losses Recognized in Other Comprehensive Income	0	0	0	0
Net Impairment Losses Recognized in Earnings	(3.2)	(5.0)	(4.1)	(6.7)
Total Revenues	645.6	592.8	1,865.7	1,881.7
Expenses:
Policyholders' Benefits and Incurred Losses and Loss Adjustment Expenses	368.7	399.6	1,169.1	1,269.0
Insurance Expenses	172.7	176.8	502.8	513.5
Interest and Other Expenses	22.7	21.4	65.4	62.0
Total Expenses	564.1	597.8	1,737.3	1,844.5
Income (Loss) from Continuing Operations before Income Taxes	81.5	(5.0)	128.4	37.2
Income Tax Benefit (Expense)	(25.9)	6.1	(34.9)	(0.5)
Income from Continuing Operations	55.6	1.1	93.5	36.7
Income from Discontinued Operations	0	0.9	8.0	13.5
Net Income	$ 55.6	$ 2.0	$ 101.5	$ 50.2
Income from Continuing Operations Per Unrestricted Share:
Basic (in dollars per share)	$ 0.95	$ 0.01	$ 1.57	$ 0.61
Diluted (in dollars per share)	$ 0.95	$ 0.01	$ 1.56	$ 0.61
Net Income Per Unrestricted Share:
Basic (in dollars per share)	$ 0.95	$ 0.03	$ 1.71	$ 0.83
Diluted (in dollars per share)	$ 0.95	$ 0.03	$ 1.70	$ 0.83
Dividends Paid to Shareholders Per Share (in dollars per share)	$ 0.24	$ 0.24	$ 0.72	$ 0.72