Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Available for sale:
Fixed maturity securities (at fair value) (amortized cost: $8,255.9 and $8,477.3)	$ 8,554.6		$ 8,712.3
Equity securities (at fair value) (cost: $966.4 and $632.0)	1,190.0		1,004.2
Short-term investments (at fair value which approximates cost)	1,291.5		1,124.8
Miscellaneous investments	21.9		21.6
Total	11,058.0		10,863.1
Other investments	5.9		5.3
Total investments	11,063.9		10,868.5
Other Assets:
Cash	130.2		153.3
Securities and indebtedness of related parties	20.2		18.0
Accrued investment income	92.0		87.2
Accounts and notes receivable	1,288.0		1,190.5
Federal income tax recoverable: Current	9.2		114.7
Federal income tax recoverable: Deferred	78.3		48.4
Prepaid Taxes	20.1		0
Reinsurance balances and funds held	179.4		189.2
Reinsurance recoverable: Paid losses	69.3		64.9
Reinsurance recoverable: Policy and claim reserves	3,201.0		3,150.8
Deferred policy acquisition costs	204.6		192.6
Sundry assets	454.1		455.7
Total Other Assets	5,747.0		5,665.9
Total Assets	16,811.0		16,534.4
Liabilities, Preferred Stock, and Common Shareholders' Equity Liabilities:
Losses, claims, and settlement expenses	9,498.0		9,433.5
Unearned premiums	1,575.7		1,487.8
Other policyholders' benefits and funds	207.1		207.8
Total policy liabilities and accruals	11,280.8		11,129.2
Commissions, expenses, fees, and taxes	376.9		409.8
Reinsurance balances and funds	508.0		441.9
Debt	566.2		569.2
Sundry liabilities	213.1		209.0
Commitments and contingent liabilities
Total Liabilities	12,945.2		12,759.4
Preferred Stock	0	[1]	0	[1]
Common Shareholders' Equity:
Common stock	260.5	[1]	260.4	[1]
Additional paid-in capital	674.5		673.9
Retained earnings	2,632.8		2,485.3
Accumulated other comprehensive income (loss)	319.5		378.2
Unallocated ESSOP shares (at cost)	(21.6)		(23.0)
Total Common Shareholders' Equity	3,865.8		3,775.0
Total Liabilities, Preferred Stock and Common Shareholders' Equity	$ 16,811.0		$ 16,534.4

[1] At March 31, 2014 and December 31, 2013, 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 260,546,465 and 260,462,217 were issued as of March 31, 2014 and December 31, 2013, respectively. At March 31, 2014 and December 31, 2013, there were 100,000,000 shares of Class B Common Stock, $1.00 par value, authorized, of which no shares were issued.