Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Investments
Fixed maturities, at fair value (amortized cost: 2018—$10,552; 2017—$10,314)	$ 10,636	$ 10,699
Equity securities, at fair value (cost: 2018—$3,198; 2017—$3,094)	6,200	6,249
Other invested assets	108	103
Total investments	16,944	17,051
Cash and cash equivalents	521	657
Investment income receivable	130	134
Finance receivable	66	61
Premiums receivable	1,733	1,589
Reinsurance recoverable	420	432
Prepaid reinsurance premiums	39	42
Deferred policy acquisition costs	728	670
Land, building and equipment, net, for company use (accumulated depreciation: 2018—$264; 2017—$253)	188	185
Other assets	199	216
Separate accounts	792	806
Total assets	21,760	21,843
Insurance reserves
Loss and loss expense reserves	5,468	5,273
Life policy and investment contract reserves	2,760	2,729
Unearned premiums	2,578	2,404
Other liabilities	707	792
Deferred income tax	650	745
Note payable	61	24
Long-term debt and capital lease obligations	828	827
Separate accounts	792	806
Total liabilities	13,844	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	1,266	1,265
Retained earnings	7,696	5,180
Accumulated other comprehensive income	55	2,788
Treasury stock at cost (2018—35.7 million shares and 2017—34.4 million shares)	(1,498)	(1,387)
Total shareholders' equity	7,916	8,243
Total liabilities and shareholders' equity	$ 21,760	$ 21,843