Consolidated Statement of Earnings (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues:
Property and casualty insurance net earned premiums	$ 1,529	$ 1,381	$ 3,952	$ 3,774
Net investment income	169	122	521	314
Realized gains (losses) on securities	(17)	23	103	(197)
Realized gains (losses) on subsidiaries	0	(30)	4	(30)
Income of managed investment entities:
Investment income	45	46	135	154
Gain (loss) on change in fair value of assets/liabilities	1	(5)	9	(21)
Other income	27	19	70	62
Total revenues	1,754	1,556	4,794	4,056
Costs and Expenses:
Losses and loss adjustment expenses	954	963	2,335	2,441
Commissions and other underwriting expenses	417	406	1,187	1,235
Interest charges on borrowed money	24	24	71	64
Expenses of managed investment entities	37	34	115	129
Other expenses	55	89	196	192
Total costs and expenses	1,487	1,516	3,904	4,061
Earnings (loss) from continuing operations before income taxes	267	40	890	(5)
Provision (credit) for income taxes	48	(48)	164	(52)
Net earnings from continuing operations, including noncontrolling interests	219	88	726	47
Net earnings (loss) from discontinued operations	0	76	914	(20)
Net earnings, including noncontrolling interests	219	164	1,640	27
Less: Net earnings (loss) from continuing operations attributable to noncontrolling interests	0	0	0	(13)
Net Earnings Attributable to Shareholders	$ 219	$ 164	$ 1,640	$ 40
Earnings (Loss) Attributable to Shareholders per Basic Common Share from:
Basic (USD per share) from continuing operations	$ 2.57	$ 1.00	$ 8.52	$ 0.67
Basic (USD per share) from discontinued operations	0	0.86	10.72	(0.22)
Basic (USD per share)	2.57	1.86	19.24	0.45
Earnings (Loss) Attributable to Shareholders per Diluted Common Share:
Diluted (USD per share) from continuing operations)	2.56	1.00	8.45	0.66
Diluted (USD per share) from discontinued operations	0	0.86	10.66	(0.21)
Diluted (USD per share)	$ 2.56	$ 1.86	$ 19.11	$ 0.45
Average number of Common Shares:
Basic (shares)	84.8	88.2	85.2	89.4
Diluted (shares)	85.2	88.5	85.8	89.9