Consolidated Statement of Earnings (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues:
Property and casualty insurance net earned premiums	$ 1,327	$ 1,267	$ 3,595	$ 3,354
Life, accident and health net earned premiums	6	6	18	17
Net investment income	527	471	1,552	1,366
Realized gains (losses) on securities	34	(12)	(28)	(1)
Income (loss) of managed investment entities:
Investment income	65	54	187	155
Gain (loss) on change in fair value of assets/liabilities	(5)	1	(10)	12
Other income	54	48	146	154
Total revenues	2,008	1,835	5,460	5,057
Costs and Expenses:
Property and casualty insurance: Losses and loss adjustment expenses	872	995	2,206	2,239
Property and casualty insurance: Commissions and other underwriting expenses	424	357	1,205	1,062
Annuity benefits	222	215	664	635
Life, accident and health benefits	10	6	32	21
Annuity and supplemental insurance acquisition expenses	71	55	203	156
Interest charges on borrowed money	15	21	46	65
Expenses of managed investment entities	52	45	154	137
Other expenses	98	112	272	285
Total costs and expenses	1,764	1,806	4,782	4,600
Earnings before income taxes	244	29	678	457
Provision for income taxes	41	18	126	146
Net earnings, including noncontrolling interests	203	11	552	311
Less: Net earnings (losses) attributable to noncontrolling interests	(1)	0	(7)	2
Net Earnings Attributable to Shareholders	$ 204	$ 11	$ 559	$ 309
Earnings Attributable to Shareholders per Common Share:
Basic (USD per share)	$ 2.30	$ 0.13	$ 6.29	$ 3.52
Diluted (USD per share)	$ 2.26	$ 0.13	$ 6.17	$ 3.44
Average number of Common Shares:
Basic (shares)	89.1	88.1	88.9	87.7
Diluted (shares)	90.7	90.0	90.6	89.7
Cash dividends per Common Share (USD per share)	$ 0.35	$ 0.3125	$ 2.55	$ 2.4375
Supplemental disclosure of Realized gains on securities:
Realized gains (losses) before impairments	$ 36	$ 26	$ (25)	$ 52
Losses on securities with impairment	(2)	(38)	(3)	(54)
Non-credit portion recognized in other comprehensive income (loss)	0	0	0	1
Impairment charges recognized in earnings	(2)	(38)	(3)	(53)
Total realized gains (losses) on securities	$ 34	$ (12)	$ (28)	$ (1)