Contingencies (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	9 Months Ended		12 Months Ended
	Jun. 30, 2007	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Note 15. Contingencies [Abstract]
Gain on sale of business in discontinued operations				$ 700
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates		9.8	0	1,010.0
Disposal Group Including Discontinued Operation Book Value				308
Total amount in dispute with Allstate		20
DAC amount in dispute with Allstate, Pre-tax		24.7
DAC amount in dispute with Allstate, after-tax		16.0
Extra contractual obligation in dispute with Allstate, pre-tax		5.2
Extra contractual obligation in dispute with Allstate, after-tax		3.4
Proceeds from Sale, Maturity and Collection of Investments	$ 32