Consolidated Statement of Earnings - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Property and casualty insurance net earned premiums	$ 5,404	$ 5,099	$ 5,185
Net investment income	730	461	532
Realized gains (losses) on:
Securities	110	(75)	155
Subsidiaries	4	23	0
Income of managed investment entities:
Investment income	181	201	269
Gain (loss) on change in fair value of assets/liabilities	10	(20)	(14)
Other income	113	80	86
Total revenues	6,552	5,769	6,213
Costs and Expenses:
Losses and loss adjustment expenses	3,157	3,271	3,271
Commissions and other underwriting expenses	1,547	1,625	1,725
Interest charges on borrowed money	94	88	68
Expenses of managed investment entities	155	167	239
Other expenses	264	279	276
Total costs and expenses	5,217	5,430	5,579
Earnings from continuing operations before income taxes	1,335	339	634
Provision for income taxes	254	25	143
Net earnings from continuing operations, including noncontrolling interests	1,081	314	491
Net earnings from discontinued operations	914	407	378
Net earnings, including noncontrolling interests	1,995	721	869
Less: Net earnings (loss) from continuing operations attributable to noncontrolling interests	0	(11)	(28)
Net Earnings Attributable to Shareholders	$ 1,995	$ 732	$ 897
Earnings Attributable to Shareholders per Basic Common Share from:
Basic (USD per share) from continuing operations	$ 12.70	$ 3.66	$ 5.77
Basic (USD per share) from discontinued operations	10.74	4.59	4.21
Basic (USD per share)	23.44	8.25	9.98
Earnings Attributable to Shareholders per Diluted Common Share:
Diluted (USD per share) from continuing operations	12.62	3.63	5.70
Diluted (USD per share) from discontinued operations	10.68	4.57	4.15
Diluted (USD per share)	$ 23.30	$ 8.20	$ 9.85
Average number of Common Shares:
Basic (shares)	85.1	88.7	89.9
Diluted (shares)	85.6	89.2	91.0