Consolidated Statement of Earnings (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues:
Property and casualty insurance net earned premiums	$ 1,546	$ 1,437
Net investment income	198	217
Realized gains (losses) on securities	14	(46)
Income of managed investment entities:
Investment income	99	104
Gain (loss) on change in fair value of assets/liabilities	10	(4)
Other income	39	32
Total revenues	1,906	1,740
Property and casualty insurance:
Commissions and other underwriting expenses	503	473
Interest charges on borrowed money	19	19
Expenses of managed investment entities	92	95
Other expenses	76	69
Total costs and expenses	1,602	1,476
Earnings before income taxes	304	264
Provision for income taxes	62	52
Net Earnings	$ 242	$ 212
Earnings per Common Share:
Total basic earnings (USD per share)	$ 2.89	$ 2.49
Total diluted earnings (USD per share)	$ 2.89	$ 2.49
Average number of Common Shares:
Basic (shares)	83.7	85.2
Diluted (shares)	83.8	85.4
Property and casualty insurance
Property and casualty insurance:
Losses and loss adjustment expenses	$ 912	$ 820