Segments of Operations (Details 1) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2015		Jun. 30, 2014	Jun. 30, 2015		Jun. 30, 2014
Segment Reporting Information [Line Items]
Earnings before realized gains (losses) and income taxes		$ 227		$ 118	$ 400		$ 260
Realized gains (losses) on securities		(1)		12	18		31
Realized loss on subsidiaries		0		0	(162)		0
Earnings before income taxes		226		130	256		291
Property and Casualty Insurance [Member]
Segment Reporting Information [Line Items]
Property and casualty insurance underwriting		50		29	110		87
Investment and other income, net		124	[1]	62	197	[1]	116
Earnings before realized gains (losses) and income taxes		174		91	307		203
Annuity [Member]
Segment Reporting Information [Line Items]
Earnings before realized gains (losses) and income taxes		88		84	163		157
Run-off Long-term Care and Life [Member]
Segment Reporting Information [Line Items]
Earnings before realized gains (losses) and income taxes		4		(2)	8		(4)
Other [Member]
Segment Reporting Information [Line Items]
Earnings before realized gains (losses) and income taxes	[2]	(39)		(55)	(78)		(96)
Specialty Property and transportation [Member]
Segment Reporting Information [Line Items]
Property and casualty insurance underwriting		(13)		(18)	(6)		(12)
Specialty casualty [Member]
Segment Reporting Information [Line Items]
Property and casualty insurance underwriting		37		30	65		68
Specialty financial [Member]
Segment Reporting Information [Line Items]
Property and casualty insurance underwriting		24		15	46		25
Specialty Other [Member]
Segment Reporting Information [Line Items]
Property and casualty insurance underwriting		3		2	6		7
Other Lines [Member]
Segment Reporting Information [Line Items]
Property and casualty insurance underwriting		$ (1)		$ 0	$ (1)		$ (1)

[1] Includes pretax income of $51 million (before noncontrolling interest) from the sale of the Le Pavillon Hotel in the second quarter of 2015.

[2] Includes holding company expenses. Also includes losses of managed investment entities attributable to noncontrolling interest of $18 million for both the second quarter and the first six months of 2014. Following the adoption of new guidance in the first quarter of 2015, there are no longer earnings (losses) of managed investment entities that are attributable to noncontrolling interests. See Note A — “Accounting Policies — Managed Investment Entities.”