Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013		Jun. 30, 2013
Investments - Available-for-sale, at fair value:
Fixed maturities (amortized cost: $12,265.4, $12,824.1, and $13,415.3)	$ 12,498.6		$ 13,540.4		$ 12,949.4
Equity securities:
Nonredeemable preferred stocks (cost: $497.1, $416.8, and $445.7)	760.2		711.2		754.4
Common equities (cost: $1,265.2, $1,438.2, and $1,451.1)	2,381.7		2,530.5		2,224.5
Short-term investments (amortized cost: $3,118.7, $1,558.1, and $1,272.6)	3,118.7		1,272.6		1,558.1
Total investments at fair value	18,759.2	[1],[2]	18,054.7	[1],[2]	17,486.4	[1],[2]
Cash	126.1		75.1		96.9
Accrued investment income	82.9		89.8		90.4
Premiums receivable, net of allowance for doubtful accounts of $133.4, $125.6, and $142.4	3,566.3		3,310.7		3,401.9
Reinsurance recoverables, including $36.2, $35.1, and $44.3 on paid losses and loss adjustment expenses	1,135.0		1,090.2		962.2
Prepaid reinsurance premiums	89.8		74.9		79.6
Deferred acquisition costs	479.0		447.6		468.1
Property and equipment, net of accumulated depreciation of $706.3, $666.0, and $680.4	952.5		960.9		950.6
Net deferred income taxes	0		0		67.9
Other assets	261.9		304.3		237.8
Total assets	25,452.7		24,408.2		23,841.8
Liabilities and Shareholders’ Equity
Unearned premiums	5,582.6		5,174.5		5,323.5
Loss and loss adjustment expense reserves	8,639.9		8,479.7		8,086.2
Net deferred income taxes	98.8		28.4		0
Dividends payable	0		890.2		0
Accounts payable, accrued expenses, and other liabilities	2,134.2		1,785.0		1,844.3
Debt	2,208.0	[3]	1,860.9	[3]	2,063.9	[3]
Total liabilities	18,663.5		18,218.7		17,317.9
Common Shares, $1.00 par value (authorized 900.0; issued 797.6, including treasury shares of 206.1, 197.2, and 201.8)	591.5		595.8		600.4
Paid-in capital	1,169.3		1,142.0		1,109.3
Retained earnings	3,989.5		3,500.0		4,000.0
Accumulated other comprehensive income, net of tax:
Net non-credit related OTTI losses, adjusted for valuation changes	0		0		0
Other net unrealized gains (losses) on securities	1,035.3		947.0		807.6
Total net unrealized gains (losses) on securities	1,035.3		947.0		807.6
Net unrealized gains on forecasted transactions	2.5		4.1		5.4
Foreign currency translation adjustment	1.1		0.6		1.2
Total accumulated other comprehensive income	1,038.9		951.7		814.2
Total shareholders’ equity	6,789.2		6,189.5		6,523.9
Total liabilities and shareholders’ equity	$ 25,452.7		$ 24,408.2		$ 23,841.8

[1] Our portfolio reflects the effect of unsettled security transactions and collateral on open derivative positions; at June 30, 2014, $235.8 million was included in "other liabilities," compared to $117.0 million and $61.3 million at June 30, 2013 and December 31, 2013, respectively.

[2] The total fair value of the portfolio at June 30, 2014 and 2013, and December 31, 2013 included $1.1 billion, $1.2 billion, and $1.8 billion, respectively, of securities held in a consolidated, non-insurance subsidiary of the holding company, net of any unsettled security transactions.

[3] Consists of both short- and long-term debt. See Note 4 - Debt.