Consolidated Statement of Earnings (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues:
Property and casualty insurance net earned premiums	$ 1,855	$ 1,767	$ 4,799	$ 4,462
Net investment income	168	151	583	549
Realized gains (losses) on:
Securities	(19)	(35)	(67)	(143)
Subsidiary	(4)	0	(4)	0
Income of managed investment entities:
Investment income	105	75	321	175
Gain (loss) on change in fair value of assets/liabilities	16	(5)	12	(25)
Other income	43	31	100	93
Total revenues	2,164	1,984	5,744	5,111
Property and casualty insurance:
Losses and loss adjustment expenses	1,239	1,176	2,964	2,643
Commissions and other underwriting expenses	497	445	1,455	1,291
Interest charges on borrowed money	19	19	57	65
Expenses of managed investment entities	105	62	303	148
Other expenses	85	72	227	187
Total costs and expenses	1,945	1,774	5,006	4,334
Earnings before income taxes	219	210	738	777
Provision for income taxes	42	45	149	155
Net Earnings	$ 177	$ 165	$ 589	$ 622
Earnings per Common Share:
Basic (USD per share)	$ 2.10	$ 1.93	$ 6.93	$ 7.30
Diluted (USD per share)	$ 2.09	$ 1.93	$ 6.93	$ 7.29
Average number of Common Shares:
Basic (shares)	84.6	85.2	85.0	85.1
Diluted (shares)	84.7	85.4	85.1	85.3