6. Sales Inducements (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011 As restated and amended [Member]	Dec. 31, 2010 As restated and amended [Member]
Changes in Deferred Sales Inducement Activity:
Deferred asset, beginning of period	$ 49.7	$ 20.4	$ 7.5
Sales inducements deferred	15.4	48.3	15.4
Amortization charged to income	(6.8)	(4.9)	(2.5)
Offsets to net unrealized investment gains or losses included in AOCI	2.6	(14.1)
Deferred asset, end of period	$ 60.9	$ 49.7	$ 20.4