Condensed Consolidated Statements of Operations (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenues:
Net investment income	$ 352.0	$ 343.0
Fee income	155.1	155.1
Premiums	11.8	9.5
Broker-dealer commission revenue	55.7	58.5
Net realized capital gains (loss):
Total other-than-temporary impairment losses	(1.4)	(21.8)
Less: portion of other-than-temporary impairment losses recognized in Other comprehensive income (loss)	(0.1)	(1.6)
Net other-than-temporary impairments recognized in earnings	(1.3)	(20.2)
Other net realized capital gains (loss)	128.6	39.8
Total net realized capital gains (loss)	127.3	19.6
Other income	0.5	10.3
Total revenue	702.4	596.0
Benefits and expenses:
Interest credited and other benefits to contract owners	194.7	175.2
Operating expenses	180.4	157.1
Broker-dealer commission expense	55.7	58.5
Net amortization of deferred policy acquisition costs and value of business acquired	52.8	33.1
Interest expense	0.6	0.7
Total benefits and expenses	484.2	424.6
Income before income taxes	218.2	171.4
Income tax expense	74.2	84.0
Net income	$ 144.0	$ 87.4