CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Investments:
Fixed maturities, at fair value (amortized cost of $6,529.5 and $6,008.7)	$ 6,952.2	$ 6,284.7
Equity securities, at fair value (cost of $299.0 and $239.9)	315.8	246.4
Other investments	210.3	190.2
Total investments	7,478.3	6,721.3
Cash and cash equivalents	564.8	820.4
Accrued investment income	69.0	71.8
Premiums and accounts receivable, net	1,308.8	1,168.1
Reinsurance recoverable on paid and unpaid losses and unearned premiums	2,479.7	2,262.2
Deferred policy acquisition costs	489.5	458.6
Deferred income taxes	267.6	274.0
Goodwill	184.9	185.5
Other assets	511.8	515.5
Assets of discontinued operations	130.5	121.2
Total assets	13,484.9	12,598.6
Liabilities
Loss and loss adjustment expense reserves	6,197.0	5,760.3
Unearned premiums	2,474.8	2,292.1
Expenses and taxes payable	775.8	642.9
Reinsurance premiums payable	466.2	378.9
Debt	849.4	911.1
Liabilities of discontinued operations	126.3	129.3
Total liabilities	10,889.5	10,114.6
Commitments and contingencies
Shareholders' Equity
Preferred stock, par value $0.01 per share; 20.0 million shares authorized; none issued
Common stock, par value $0.01 per share; 300.0 million shares authorized; 60.5 million shares issued	0.6	0.6
Additional paid-in capital	1,787.1	1,784.8
Accumulated other comprehensive income	325.8	210.4
Retained earnings	1,211.6	1,211.3
Treasury stock at cost (16.2 and 15.9 million shares)	(729.7)	(723.1)
Total shareholders' equity	2,595.4	2,484.0
Total liabilities and shareholders' equity	$ 13,484.9	$ 12,598.6