Condensed Consolidated Statements of Operations (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues:
Net investment income	$ 311.9	$ 380.7	$ 663.9	$ 723.7
Fee income	156.7	160.7	311.8	315.8
Premiums	11.7	6.9	23.5	16.4
Broker-dealer commission revenue	56.5	56.8	112.2	115.3
Net realized capital gains (loss):
Total other-than-temporary impairment losses	(2.6)	(18.5)	(4.0)	(40.3)
Less: portion of other-than-temporary impairment losses recognized in Other comprehensive income (loss)	(0.9)	(0.7)	(1.0)	(2.3)
Net other-than-temporary impairments recognized in earnings	(1.7)	(17.8)	(3.0)	(38.0)
Other net realized capital gains (losses)	0.5	33.7	129.1	73.5
Total net realized capital gains (losses)	(1.2)	15.9	126.1	35.5
Other income	2.3	2.6	2.8	12.9
Total revenues	537.9	623.6	1,240.3	1,219.6
Benefits and expenses:
Interest credited and other benefits to contract owners	193.0	184.1	387.7	359.3
Operating expenses	177.2	173.2	357.6	330.3
Broker-dealer commission expense	56.5	56.8	112.2	115.3
Net amortization of deferred policy acquisition costs and value of business acquired	52.2	49.2	105.0	82.3
Interest expense	0.5	0.6	1.1	1.3
Total benefits and expenses	479.4	463.9	963.6	888.5
Income (loss) before income taxes	58.5	159.7	276.7	331.1
Income tax expense (benefit)	20.6	43.1	94.8	127.1
Net income (loss)	$ 37.9	$ 116.6	$ 181.9	$ 204.0