8. Separate Accounts Death Benefits and Other Insurance Benefit Features and Embedded Product Derivatives (Details 1) (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2012 Variable Annuity GMDB	Dec. 31, 2011 Variable Annuity GMDB As restated and amended [Member]	Sep. 30, 2012 Variable Annuity GMIB	Dec. 31, 2011 Variable Annuity GMIB As restated and amended [Member]	Sep. 30, 2012 Fixed Indexed Annuity GMWB & GMDB	Dec. 31, 2011 Fixed Indexed Annuity GMWB & GMDB As restated and amended [Member]	Sep. 30, 2012 Universal Life Secondary Guarantees [Member]	Dec. 31, 2011 Universal Life Secondary Guarantees [Member] As restated and amended [Member]
Liability balance, beginning of the period	$ 10.8	$ 11.2	$ 17.2	$ 17.5	$ 5.6	$ 0.5	$ 98.2	$ 88.5
Incurred		1.5	3.6	(0.7)	32.3	5.1	12.4	16.0
Paid	(0.9)	(1.9)					(7.2)	(6.3)
Assumption unlocking			(0.2)	0.4
Liability balance, end of the period	$ 9.9	$ 10.8	$ 20.6	$ 17.2	$ 37.9	$ 5.6	$ 103.4	$ 98.2