5. Deferred Policy Acquisition Costs (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2011 As restated and amended [Member]	Sep. 30, 2011 As restated and amended [Member]
Deferred Policy Acquisition Costs:
Policy acquisition costs deferred	$ 20.4	$ 63.7	$ 31.1	$ 71.5
Costs amortized to expenses:
Recurring costs	(5.1)	(78.2)	(33.8)	(94.4)
Assumption unlocking	(1.2)	(1.2)	(1.2)	(1.2)
Realized investment gains (losses)	(18.0)	(13.2)	6.1	5.3
Offsets to net unrealized investment gains or losses included in AOCI (1)	5.8	(25.6)	(17.7)	(30.1)
Change in deferred policy acquisition costs	1.9	(54.5)	(15.5)	(48.9)
Deferred policy acquisition costs, beginning of period	433	489	502	535
Deferred policy acquisition costs, end of period	$ 434.6	$ 434.6	$ 486.4	$ 486.4