Consolidated Statement of Earnings (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues:
Property and casualty insurance net earned premiums	$ 1,107	$ 1,022
Life, accident and health net earned premiums	6	6
Net investment income	495	435
Realized gains (losses) on:
Realized gains (losses) on securities	(93)	3
Income (loss) of managed investment entities:
Investment income	58	51
Gain (loss) on change in fair value of assets/liabilities	(3)	0
Other income	49	59
Total revenues	1,619	1,576
Costs and Expenses:
Property and casualty insurance: Losses and loss adjustment expenses	641	609
Property and casualty insurance: Commissions and other underwriting expenses	381	339
Annuity benefits	182	196
Life, accident and health benefits	11	9
Annuity and supplemental insurance acquisition expenses	82	53
Interest charges on borrowed money	15	21
Expenses of managed investment entities	48	41
Other expenses	85	85
Total costs and expenses	1,445	1,353
Earnings before income taxes	174	223
Provision for income taxes	33	68
Net earnings, including noncontrolling interests	141	155
Less: Net earnings (losses) attributable to noncontrolling interests	(4)	2
Net Earnings Attributable to Shareholders	$ 145	$ 153
Earnings Attributable to Shareholders per Common Share:
Basic (USD per share)	$ 1.64	$ 1.76
Diluted (USD per share)	$ 1.60	$ 1.72
Average number of Common Shares:
Basic (shares)	88.6	87.2
Diluted (shares)	90.4	89.3
Cash dividends per Common Share (USD per share)	$ 0.35	$ 0.3125
Supplemental disclosure of Realized gains on securities:
Realized gains (losses) before impairments	$ (92)	$ 9
Losses on securities with impairment	(1)	(6)
Non-credit portion recognized in other comprehensive income (loss)	0	0
Impairment charges recognized in earnings	(1)	(6)
Total realized gains (losses) on securities	$ (93)	$ 3