Condensed Consolidated Statements of Operations (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:
Net investment income	$ 328.2	$ 344.7	$ 1,019.3	$ 1,008.6
Fee income	189.9	167.0	547.9	478.8
Premiums	7.6	6.1	22.7	29.6
Broker-dealer commission revenue	61.5	54.8	180.3	167.0
Net realized capital gains (losses):
Total other-than-temporary impairments	(1.6)	(4.7)	(4.5)	(8.7)
Less: Portion of other-than-temporary impairment losses recognized in Other comprehensive income (loss)	(0.8)	(0.1)	(1.8)	(1.1)
Net other-than-temporary impairments recognized in earnings	(0.8)	(4.6)	(2.7)	(7.6)
Other net realized capital gains (losses)	(27.3)	(21.1)	(135.4)	108.0
Total net realized capital gains (losses)	(28.1)	(25.7)	(138.1)	100.4
Other revenue	2.9	1.0	(2.6)	3.8
Total revenues	562.0	547.9	1,629.5	1,788.2
Benefits and expenses:
Policyholder benefits and interest credited to contract owner account balance	204.2	189.3	536.3	577.0
Operating expenses	178.0	163.0	527.9	520.6
Broker-dealer commission expense	61.5	54.8	180.3	167.0
Net amortization of deferred policy acquisition costs and value of business acquired	(15.2)	13.5	31.7	118.5
Interest expense	0.2	0.6	0.3	1.7
Total benefits and expenses	428.7	421.2	1,276.5	1,384.8
Income (loss) before income taxes	133.3	126.7	353.0	403.4
Income tax expense (benefit)	65.7	33.4	133.4	128.2
Net income (loss)	$ 67.6	$ 93.3	$ 219.6	$ 275.2