Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Assets
Fixed maturities, at fair value (amortized cost of $6,785.1 and $6,815.2)	$ 7,058.5	$ 6,970.6
Equity securities, at fair value (cost of $446.4 and $366.5)	530.5	430.2
Other investments	238.5	192.5
Total investments	7,827.5	7,593.3
Cash and cash equivalents	606.2	486.2
Accrued investment income	70.0	68.0
Premiums and accounts receivable, net	1,515.9	1,324.6
Reinsurance recoverable on paid and unpaid losses and unearned premiums	2,416.7	2,335.0
Deferred acquisition costs	540.6	506.0
Deferred income taxes	145.6	239.7
Goodwill	185.2	184.9
Other assets	542.1	526.1
Assets of discontinued operations	115.0	114.9
Total assets	13,964.8	13,378.7
Liabilities
Loss and loss adjustment expense reserves	6,448.0	6,231.5
Unearned premiums	2,689.0	2,515.8
Expenses and taxes payable	569.7	637.2
Reinsurance premiums payable	443.2	374.7
Debt	903.9	903.9
Liabilities of discontinued operations	115.9	121.1
Total liabilities	11,169.7	10,784.2
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	1,824.5	1,830.1
Accumulated other comprehensive income	267.1	177.6
Retained earnings	1,451.7	1,349.1
Treasury stock at cost (16.6 and 16.8 million shares)	(748.8)	(762.9)
Total shareholders' equity	2,795.1	2,594.5
Total liabilities and shareholders' equity	$ 13,964.8	$ 13,378.7