Contingencies (Details) (USD $)	1 Months Ended	6 Months Ended			3 Months Ended	12 Months Ended
	Jun. 30, 2007	Jun. 30, 2013	Jun. 30, 2012	Aug. 17, 2012	Jun. 30, 2013 Esurance	Dec. 31, 2011 Esurance	Dec. 31, 2012 Esurance	Dec. 30, 2011 Esurance
Loss Contingencies [Line Items]
Warranty agreement period					18 months
Covenant breach agreement period					2 years
Non-soliciation agreement period					3 years
Percentage of fluctuation in loss reserves of transferred subsidiaries retained							90.00%
Sales of consolidated and unconsolidated affiliates, net of cash sold		$ 31,300,000	$ 0			$ 1,010,000,000
Gain on sale of business in discontinued operations						700,000,000
Disposal Group Including Discontinued Operation Book Value						308,000,000
Total amount in dispute with Allstate								20,000,000
DAC amount in dispute with Allstate, Pre-tax								24,700,000
DAC amount in dispute with Allstate, after-tax								16,000,000
Extra contractual obligation in dispute with Allstate, pre-tax								5,200,000
Extra contractual obligation in dispute with Allstate, after-tax								3,400,000
Proceeds from Sale, Maturity and Collection of Investments	39,000,000
Number of former employees that received a demand of arbitration				$ 5