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
Premiums	$ 1,071.0	$ 1,018.6	$ 3,156.6	$ 2,550.8
Net investment income	69.2	67.8	206.5	189.2
Net realized investment gains (losses):
Net realized gains from sales and other	7.2	9.7	10.4	28.6
Net other-than-temporary impairment losses on investments recognized in earnings	(2.2)	(1.5)	(5.7)	(3.7)
Total net realized investment gains	5.0	8.2	4.7	24.9
Fees and other income	12.5	13.4	38.9	30.8
Total revenues	1,157.7	1,108.0	3,406.7	2,795.7
LOSSES AND EXPENSES
Losses and loss adjustment expenses	708.4	734.9	2,101.9	1,863.4
Policy acquisition expenses	235.8	222.3	697.0	547.5
Interest expense	14.6	17.4	46.7	38.6
Other operating expenses	145.7	152.7	426.0	388.2
Total losses and expenses	1,104.5	1,127.3	3,271.6	2,837.7
Income (loss) before income taxes	53.2	(19.3)	135.1	(42.0)
Income tax expense (benefit):
Current	(16.9)	(18.4)	11.2	(40.7)
Deferred	29.2	9.1	22.5	13.6
Total income tax expense (benefit)	12.3	(9.3)	33.7	(27.1)
Income (loss) from continuing operations	40.9	(10.0)	101.4	(14.9)
Net gain from discontinued operations (net of income tax benefit of $0.3 and $0.1 for the three months ended September 30, 2012 and September 30, 2011 and $0.7 for the nine months ended September 30, 2012)	(0.5)		9.5	2.0
Net income (loss)	$ 40.4	$ (10.0)	$ 110.9	$ (12.9)
Basic
Income (loss) from continuing operations	$ 0.92	$ (0.22)	$ 2.26	$ (0.33)
Net gain from discontinued operations	$ (0.01)		$ 0.21	$ 0.05
Net income (loss) per share	$ 0.91	$ (0.22)	$ 2.47	$ (0.28)
Weighted average shares outstanding	44.6	45.3	44.8	45.4
Diluted
Income (loss) from continuing operations	$ 0.90	$ (0.22)	$ 2.23	$ (0.33)
Net gain from discontinued operations	$ (0.01)		$ 0.21	$ 0.05
Net income (loss) per share	$ 0.89	$ (0.22)	$ 2.44	$ (0.28)
Weighted average shares outstanding	45.2	45.3	45.4	45.4