Condensed Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues:
Net investment income	$ 1,500.6	$ 1,409.8	$ 1,389.4
Fee income	724.6	765.3	784.1
Net premiums	870.2	657.1	88.8
Broker-dealer commission revenue	175.4	229.7	244.9
Net realized capital gains (losses):
Total other-than-temporary impairments	(19.0)	(44.7)	(7.1)
Less: Portion of other-than-temporary impairment losses recognized in Other comprehensive income (loss)	0.4	1.2	0.0
Net other-than-temporary impairments recognized in earnings	(19.4)	(45.9)	(7.1)
Other net realized capital gains (losses)	(193.8)	(231.3)	(132.5)
Total net realized capital gains (losses)	(213.2)	(277.2)	(139.6)
Other revenue	(1.4)	(1.6)	4.4
Total revenues	3,056.2	2,783.1	2,372.0
Benefits and expenses:
Interest credited and other benefits to contract owners/policyholders	1,764.6	1,422.3	927.8
Operating expenses	815.5	772.5	783.9
Broker-dealer commission expense	175.4	229.7	244.9
Net amortization of deferred policy acquisition costs and value of business acquired	166.5	132.6	109.2
Total benefits and expenses	2,922.0	2,557.1	2,065.8
Income (loss) before income taxes	134.2	226.0	306.2
Income tax expense (benefit)	21.4	52.8	74.5
Net income (loss)	$ 112.8	$ 173.2	$ 231.7