Consolidated Statement of Earnings - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues:
Net earned premiums	$ 7,036	$ 6,531	$ 6,085
Net investment income	780	742	717
Realized gains (losses) on:
Securities	0	(36)	(116)
Realized loss on subsidiary	0	(4)	0
Income of managed investment entities:
Investment income	380	421	268
Gain (loss) on change in fair value of assets/liabilities	4	27	(31)
Other income	124	146	117
Total revenues	8,324	7,827	7,040
Costs and Expenses:
Losses and loss adjustment expenses	4,460	4,033	3,629
Commissions and other underwriting expenses	2,007	1,935	1,718
Interest charges on borrowed money	76	76	85
Expenses of managed investment entities	338	405	230
Other expenses	319	305	255
Total costs and expenses	7,200	6,754	5,917
Earnings before income taxes	1,124	1,073	1,123
Provision for income taxes	237	221	225
Net Earnings	$ 887	$ 852	$ 898
Earnings per Common Share:
Basic (USD per share)	$ 10.57	$ 10.06	$ 10.55
Diluted (USD per share)	$ 10.57	$ 10.05	$ 10.53
Average number of Common Shares:
Basic (shares)	83.9	84.7	85.1
Diluted (shares)	83.9	84.8	85.3