Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Investments
Fixed maturities, at fair value (amortized cost: 2018—$10,364; 2017—$10,314)	$ 10,528	$ 10,699
Equity securities, at fair value (cost: 2017—$3,094)	6,086	6,249
Other invested assets	107	103
Total investments	16,721	17,051
Cash and cash equivalents	604	657
Investment income receivable	124	134
Finance receivable	61	61
Premiums receivable	1,626	1,589
Reinsurance recoverable	423	432
Prepaid reinsurance premiums	39	42
Deferred policy acquisition costs	691	670
Land, building and equipment, net, for company use (accumulated depreciation: 2018—$259; 2017—$253)	186	185
Other assets	192	216
Separate accounts	803	806
Total assets	21,470	21,843
Insurance reserves
Loss and loss expense reserves	5,345	5,273
Life policy and investment contract reserves	2,740	2,729
Unearned premiums	2,459	2,404
Other liabilities	672	792
Deferred income tax	652	745
Note payable	24	24
Long-term debt and capital lease obligations	829	827
Separate accounts	803	806
Total liabilities	13,524	13,600
Commitments and contingent liabilities (Note 12)
Shareholders' Equity
Common stock, par value—$2 per share; (authorized: 2018 and 2017—500 million shares; issued: 2018 and 2017—198.3 million shares)	397	397
Paid-in capital	1,258	1,265
Retained earnings	7,565	5,180
Accumulated other comprehensive income	115	2,788
Treasury stock at cost (2018—34.2 million shares and 2017—34.4 million shares)	(1,389)	(1,387)
Total shareholders' equity	7,946	8,243
Total liabilities and shareholders' equity	$ 21,470	$ 21,843