Segments of Operations (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Segment Reporting Information [Line Items]
Earnings before realized gains (losses) and income taxes	$ 118		$ 85		$ 260		$ 203
Realized gains on securities	12		41		31		98
Earnings before income taxes	130		126		291		301
Property and Casualty Insurance [Member]
Segment Reporting Information [Line Items]
Property and casualty insurance underwriting	29		19		87		62
Investment and other income, net	62		60		116		116
Earnings before realized gains (losses) and income taxes	91		79		203		178
Annuity [Member]
Segment Reporting Information [Line Items]
Earnings before realized gains (losses) and income taxes	84	[1]	77	[1]	157	[1]	153	[1]
Run-off Long-term Care and Life [Member]
Segment Reporting Information [Line Items]
Earnings before realized gains (losses) and income taxes	(2)		(2)		(4)		(3)
Other [Member]
Segment Reporting Information [Line Items]
Earnings before realized gains (losses) and income taxes	(55)	[2]	(69)	[2]	(96)	[2]	(125)	[2]
Specialty Property and transportation [Member]
Segment Reporting Information [Line Items]
Property and casualty insurance underwriting	(18)		(31)		(12)		(21)
Specialty casualty [Member]
Segment Reporting Information [Line Items]
Property and casualty insurance underwriting	30		32		68		51
Specialty financial [Member]
Segment Reporting Information [Line Items]
Property and casualty insurance underwriting	15		15		25		28
Specialty Other [Member]
Segment Reporting Information [Line Items]
Property and casualty insurance underwriting	2		5		7		11
Other Lines [Member]
Segment Reporting Information [Line Items]
Property and casualty insurance underwriting	$ 0		$ (2)		$ (1)		$ (7)

[1] Includes a $5 million charge in the second quarter of 2013 to cover expected assessments from state guaranty funds related to the insolvency and liquidation of an unaffiliated life insurance company.

[2] Includes holding company expenses and earnings (losses) of managed investment entities attributable to noncontrolling interests (losses of $18 million and $31 million for the second quarter and $18 million and $42 million for the first six months of 2014 and 2013, respectively).