Restatement and Amendment of Previously Reported Financial Information Summary of Correction of Investments Errors, Income Statement (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
REVENUES:
Premiums	$ 5.1	$ 1.7	$ 8.2	$ 2.4
Insurance and investment product fees	87.2	91.4	177.3	188.2
Net investment income	34.1	32.6	67.1	63.2
Net realized investment gains (losses):
Total other-than-temporary impairment (“OTTI”) losses	0	(3.0)	(0.3)	(3.7)
Portion of OTTI gains (losses) recognized in other comprehensive income (“OCI”)	(0.2)	2.4	(0.9)	2.1
Net OTTI losses recognized in earnings	(0.2)	(0.6)	(1.2)	(1.6)
Net realized investment gains (losses), excluding OTTI losses	10.9	(13.4)	(5.5)	(14.9)
Net realized investment gains (losses)	10.7	(14.0)	(6.7)	(16.5)
Total revenues	137.1	111.7	245.9	237.3
BENEFITS AND EXPENSES:
Policy benefits	91.4	91.6	179.9	153.4
Policy acquisition cost amortization	26.6	27.6	40.6	68.3
Other operating expenses	31.4	24.1	60.0	50.9
Total benefits and expenses	149.4	143.3	280.5	272.6
Income (loss) before income taxes	(12.3)	(31.6)	(34.6)	(35.3)
Income tax expense (benefit)	(16.9)	0.5	(18.8)	19.3
Net income (loss)	4.6	(32.1)	(15.8)	(54.6)
COMPREHENSIVE INCOME (LOSS):
Unrealized investment gains (losses), net of related offsets	(12.1)	8.1	(25.4)	16.7
Less: Income tax expense (benefit) related to:
Unrealized investment gains (losses), net of related offsets	(12.1)	6.3	(9.4)	10.0
Other comprehensive income (loss), net of income taxes	0	1.8	(16.0)	6.7
Comprehensive income (loss)	4.6	(30.3)	(31.8)	(47.9)
Derivative Valuation
REVENUES:
Premiums		0		0
Insurance and investment product fees		0		0
Net investment income		0		0
Net realized investment gains (losses):
Total other-than-temporary impairment (“OTTI”) losses		0		0
Portion of OTTI gains (losses) recognized in other comprehensive income (“OCI”)		0		0
Net OTTI losses recognized in earnings		0		0
Net realized investment gains (losses), excluding OTTI losses		(1.9)		2.2
Net realized investment gains (losses)		(1.9)		2.2
Total revenues		(1.9)		2.2
BENEFITS AND EXPENSES:
Policy benefits		0		0
Policy acquisition cost amortization		(0.5)		(1.9)
Other operating expenses		0		0
Total benefits and expenses		(0.5)		(1.9)
Income (loss) before income taxes		(1.4)		4.1
Income tax expense (benefit)		0		0
Net income (loss)		(1.4)		4.1
COMPREHENSIVE INCOME (LOSS):
Unrealized investment gains (losses), net of related offsets		0		0
Less: Income tax expense (benefit) related to:
Unrealized investment gains (losses), net of related offsets		0		0
Other comprehensive income (loss), net of income taxes		0		0
Comprehensive income (loss)		(1.4)		4.1
Structured Securities
REVENUES:
Premiums		0		0
Insurance and investment product fees		0		0
Net investment income		(0.1)		0
Net realized investment gains (losses):
Total other-than-temporary impairment (“OTTI”) losses		0		0.4
Portion of OTTI gains (losses) recognized in other comprehensive income (“OCI”)		0		(0.7)
Net OTTI losses recognized in earnings		0		(0.3)
Net realized investment gains (losses), excluding OTTI losses		0		0
Net realized investment gains (losses)		0		(0.3)
Total revenues		(0.1)		(0.3)
BENEFITS AND EXPENSES:
Policy benefits		0		0
Policy acquisition cost amortization		0		0
Other operating expenses		0		0
Total benefits and expenses		0		0
Income (loss) before income taxes		(0.1)		(0.3)
Income tax expense (benefit)		0		0
Net income (loss)		(0.1)		(0.3)
COMPREHENSIVE INCOME (LOSS):
Unrealized investment gains (losses), net of related offsets		0.2		0.5
Less: Income tax expense (benefit) related to:
Unrealized investment gains (losses), net of related offsets		0		0
Other comprehensive income (loss), net of income taxes		0.2		0.5
Comprehensive income (loss)		0.1		0.2
Total Investment Errors
REVENUES:
Premiums		0		0
Insurance and investment product fees		0		0
Net investment income		(0.1)		0
Net realized investment gains (losses):
Total other-than-temporary impairment (“OTTI”) losses		0		0.4
Portion of OTTI gains (losses) recognized in other comprehensive income (“OCI”)		0		(0.7)
Net OTTI losses recognized in earnings		0		(0.3)
Net realized investment gains (losses), excluding OTTI losses		(1.9)		2.2
Net realized investment gains (losses)		(1.9)		1.9
Total revenues		(2.0)		1.9
BENEFITS AND EXPENSES:
Policy benefits		0		0
Policy acquisition cost amortization		(0.5)		(1.9)
Other operating expenses		0		0
Total benefits and expenses		(0.5)		(1.9)
Income (loss) before income taxes		(1.5)		3.8
Income tax expense (benefit)		0		0
Net income (loss)		(1.5)		3.8
COMPREHENSIVE INCOME (LOSS):
Unrealized investment gains (losses), net of related offsets		(1.7)		(1.4)
Less: Income tax expense (benefit) related to:
Unrealized investment gains (losses), net of related offsets		0		0
Other comprehensive income (loss), net of income taxes		(1.7)		(1.4)
Comprehensive income (loss)		(3.2)		2.4
Available-for-sale Securities | AFS Valuation
REVENUES:
Premiums		0		0
Insurance and investment product fees		0		0
Net investment income		0		0
Net realized investment gains (losses):
Total other-than-temporary impairment (“OTTI”) losses		0		0
Portion of OTTI gains (losses) recognized in other comprehensive income (“OCI”)		0		0
Net OTTI losses recognized in earnings		0		0
Net realized investment gains (losses), excluding OTTI losses		0		0
Net realized investment gains (losses)		0		0
Total revenues		0		0
BENEFITS AND EXPENSES:
Policy benefits		0		0
Policy acquisition cost amortization		0		0
Other operating expenses		0		0
Total benefits and expenses		0		0
Income (loss) before income taxes		0		0
Income tax expense (benefit)		0		0
Net income (loss)		0		0
COMPREHENSIVE INCOME (LOSS):
Unrealized investment gains (losses), net of related offsets		(1.9)		(1.9)
Less: Income tax expense (benefit) related to:
Unrealized investment gains (losses), net of related offsets		0		0
Other comprehensive income (loss), net of income taxes		(1.9)		(1.9)
Comprehensive income (loss)		$ (1.9)		$ (1.9)