Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Available for sale:
Fixed maturity securities (at fair value) (amortized cost: $8,329.4 and $7,993.1)	$ 8,630.7		$ 8,566.2
Equity securities (at fair value) (adjusted cost: $591.9 and $452.1)	911.2		739.7
Short‑term investments (at fair value which approximates cost)	1,149.5		1,264.9
Miscellaneous investments	18.6		29.6
Total	10,710.1		10,600.5
Other investments	5.4		8.2
Total investments	10,715.5		10,608.8
Other Assets:
Cash	156.3		101.2
Securities and indebtedness of related parties	21.6		12.7
Accrued investment income	92.5		90.4
Accounts and notes receivable	1,229.6		1,134.7
Federal income tax recoverable: Current	69.3		71.9
Federal income tax recoverable: Deferred	95.7		148.1
Reinsurance balances and funds held	197.1		201.6
Reinsurance recoverable: Paid losses	107.7		103.7
Reinsurance recoverable: Policy and claim reserves	3,201.7		3,133.3
Deferred policy acquisition costs	189.2		165.5
Sundry assets	449.7		454.2
Total Other Assets	5,810.8		5,618.0
Total Assets	16,526.4		16,226.8
Liabilities, Preferred Stock, and Common Shareholders' Equity Liabilities:
Losses, claims, and settlement expenses	9,358.4		9,303.3
Unearned premiums	1,543.5		1,364.4
Other policyholders' benefits and funds	201.0		201.8
Total policy liabilities and accruals	11,103.0		10,869.6
Commissions, expenses, fees, and taxes	433.4		511.1
Reinsurance balances and funds	500.8		437.9
Debt	569.2		572.9
Sundry liabilities	203.7		238.8
Commitments and contingent liabilities
Total Liabilities	12,810.3		12,630.6
Preferred Stock	0	[1]	0	[1]
Common Shareholders' Equity:
Common stock	259.9	[1]	259.4	[1]
Additional paid‑in capital	666.8		660.9
Retained earnings	2,436.9		2,222.3
Accumulated other comprehensive income (loss)	376.5		481.7
Unallocated ESSOP shares (at cost)	(24.3)		(28.2)
Total Common Shareholders' Equity	3,716.0		3,596.2
Total Liabilities, Preferred Stock and Common Shareholders' Equity	$ 16,526.4		$ 16,226.8

[1] At September 30, 2013 and December 31, 2012, there were 75,000,000 shares of $0.01 par value preferred stock authorized, of which no shares were outstanding. As of the same dates, there were 500,000,000 shares of common stock, $1.00 par value, authorized, of which 259,997,750 and 259,490,089 were issued as of September 30, 2013 and December 31, 2012, respectively. At September 30, 2013 and December 31, 2012, there were 100,000,000 shares of Class B Common Stock, $1.00 par value, authorized, of which no shares were issued.