Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Investments
Fixed maturities, at fair value (amortized cost: 2014—$8,609; 2013—$8,638)	$ 9,180	$ 9,121
Equity securities, at fair value (cost: 2014—$2,545; 2013—$2,523)	4,426	4,375
Other invested assets	72	68
Total investments	13,678	13,564
Cash and cash equivalents	521	433
Investment income receivable	116	121
Finance receivable	83	85
Premiums receivable	1,396	1,346
Reinsurance recoverable	546	547
Prepaid reinsurance premiums	27	26
Deferred policy acquisition costs	564	565
Land, building and equipment, net, for company use (accumulated depreciation: 2014—$424; 2013—$420)	207	210
Other assets	79	73
Separate accounts	725	692
Total assets	17,942	17,662
Insurance reserves
Loss and loss expense reserves	4,375	4,311
Life policy and investment contract reserves	2,435	2,390
Unearned premiums	2,035	1,976
Other liabilities	545	611
Deferred income tax	721	673
Note payable	104	104
Long-term debt and capital lease obligations	834	835
Separate accounts	725	692
Total liabilities	11,774	11,592
Commitments and contingent liabilities (Note 12)	0	0
Shareholders' Equity
Common stock, par value—$2 per share; (authorized: 2014 and 2013—500 million shares; issued: 2014 and 2013—198 million shares)	397	397
Paid-in capital	1,191	1,191
Retained earnings	4,287	4,268
Accumulated other comprehensive income	1,578	1,504
Treasury stock at cost (2014 and 2013—35 million shares)	(1,285)	(1,290)
Total shareholders' equity	6,168	6,070
Total liabilities and shareholders' equity	$ 17,942	$ 17,662