Consolidated Statement of Earnings (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues:
Property and casualty insurance net earned premiums	$ 3,204	$ 2,847	$ 2,759
Life, accident and health net earned premiums	114	318	430
Net investment income	1,346	1,301	1,225
Realized gains (losses) on:
Securities	221	210	76
Subsidiaries	(4)	161	(3)
Income (loss) of managed investment entities:
Investment income	128	125	105
Loss on change in fair value of assets/liabilities	(14)	(94)	(33)
Other income	97	89	84
Total revenues	5,092	4,957	4,643
Costs and Expenses:
Property and casualty insurance: Losses and loss adjustment expenses	2,040	1,873	1,744
Property and casualty insurance: Commissions and other underwriting expenses	1,019	887	835
Annuity benefits	531	541	510
Life, accident and health benefits	160	356	360
Annuity and supplemental insurance acquisition expenses	167	282	195
Interest charges on borrowed money	71	75	74
Expenses of managed investment entities	89	80	71
Other expenses	326	326	296
Total costs and expenses	4,403	4,420	4,085
Earnings before income taxes	689	537	558
Provision for income taxes	236	135	239
Net earnings, including noncontrolling interests	453	402	319
Less: Net earnings (loss) attributable to noncontrolling interests	(18)	(86)	(23)
Net Earnings Attributable to Shareholders	471	488	342
Earnings Attributable to Shareholders per Common Share:
Basic (USD per share)	$ 5.27	$ 5.18	$ 3.37
Diluted (USD per share)	$ 5.16	$ 5.09	$ 3.32
Average number of Common Shares:
Basic (shares)	89.3	94.2	101.3
Diluted (shares)	91.2	95.9	102.9
Cash dividends per Common Share (USD per share)	$ 1.805	$ 0.97	$ 0.6625
Supplemental disclosure of Realized gains (losses) on securities:
Realized gains before impairments	233	236	128
Losses on securities with impairment	(14)	(27)	(31)
Non-credit portion recognized in other comprehensive income (loss)	2	1	(21)
Impairment charges recognized in earnings	(12)	(26)	(52)
Total realized gains on securities	$ 221	$ 210	$ 76