Condensed Statements of Operations (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues:
Net investment income	$ 317.5	$ 358.9	$ 978.7	$ 1,084.8
Fee income	196.8	210.1	609.8	658.5
Premiums	112.0	112.2	341.9	345.8
Net realized capital gains (losses):
Total other-than-temporary impairment losses	(3.5)	(61.9)	(12.1)	(152.9)
Less: Portion of other-than-temporary impairment losses recognized in Other comprehensive income (loss)	(0.2)	(10.0)	(2.9)	(15.1)
Net other-than-temporary impairments recognized in earnings	(3.3)	(51.9)	(9.2)	(137.8)
Other net realized capital gains (losses)	(208.9)	1,151.3	(1,061.0)	851.9
Total net realized capital gains (losses)	(212.2)	1,099.4	(1,070.2)	714.1
Other income	7.3	12.8	27.6	46.4
Total revenue	421.4	1,793.4	887.8	2,849.6
Benefits and expenses:
Interest credited and other benefits to contract owners	(173.5)	2,340.0	304.8	2,890.1
Operating expenses	106.3	108.4	332.0	333.3
Net amortization of deferred policy acquisition costs and value of business acquired	238.5	(695.9)	284.6	(566.6)
Interest expense	7.9	8.0	23.5	23.7
Other expense	4.4	10.6	20.9	27.2
Total benefits and expenses	183.6	1,771.1	965.8	2,707.7
Income (loss) before income taxes	237.8	22.3	(78.0)	141.9
Income tax expense (benefit)	45.6	(100.0)	(27.4)	(94.5)
Net income (loss)	$ 192.2	$ 122.3	$ (50.6)	$ 236.4