Supplemental Unaudited Quarterly Financial Information Consolidated Statements of Income and Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended
Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
REVENUES:
Premiums		$ 3.0us-gaap_PremiumsEarnedNet	$ 4.7us-gaap_PremiumsEarnedNet	$ 2.8us-gaap_PremiumsEarnedNet		$ 3.1us-gaap_PremiumsEarnedNet	$ 5.1us-gaap_PremiumsEarnedNet	$ 3.1us-gaap_PremiumsEarnedNet	$ 7.5us-gaap_PremiumsEarnedNet	$ 8.2us-gaap_PremiumsEarnedNet	$ 10.5us-gaap_PremiumsEarnedNet	$ 11.3us-gaap_PremiumsEarnedNet	$ 12.4us-gaap_PremiumsEarnedNet	$ 13.9us-gaap_PremiumsEarnedNet	$ 8.5us-gaap_PremiumsEarnedNet
Insurance and investment product fees		88.7us-gaap_FeesAndCommissions	88.3us-gaap_FeesAndCommissions	89.0us-gaap_FeesAndCommissions		94.0us-gaap_FeesAndCommissions	87.2us-gaap_FeesAndCommissions	90.1us-gaap_FeesAndCommissions	177.3us-gaap_FeesAndCommissions	177.3us-gaap_FeesAndCommissions	266.0us-gaap_FeesAndCommissions	271.3us-gaap_FeesAndCommissions	358.3us-gaap_FeesAndCommissions	367.0us-gaap_FeesAndCommissions	365.2us-gaap_FeesAndCommissions
Net investment income		44.1us-gaap_NetInvestmentIncome	42.0us-gaap_NetInvestmentIncome	40.0us-gaap_NetInvestmentIncome		36.3us-gaap_NetInvestmentIncome	34.0us-gaap_NetInvestmentIncome	33.2us-gaap_NetInvestmentIncome	82.0us-gaap_NetInvestmentIncome	67.2us-gaap_NetInvestmentIncome	126.1us-gaap_NetInvestmentIncome	103.5us-gaap_NetInvestmentIncome	172.0us-gaap_NetInvestmentIncome	140.9us-gaap_NetInvestmentIncome	130.9us-gaap_NetInvestmentIncome
Net realized investment gains (losses):
Total other-than-temporary impairment (“OTTI”) losses		(0.5)us-gaap_ImpairmentOfInvestments	0us-gaap_ImpairmentOfInvestments	0us-gaap_ImpairmentOfInvestments		(0.2)us-gaap_ImpairmentOfInvestments	0us-gaap_ImpairmentOfInvestments	(0.2)us-gaap_ImpairmentOfInvestments	0us-gaap_ImpairmentOfInvestments	(0.2)us-gaap_ImpairmentOfInvestments	(0.5)us-gaap_ImpairmentOfInvestments	(0.4)us-gaap_ImpairmentOfInvestments	(1.3)us-gaap_ImpairmentOfInvestments	(0.9)us-gaap_ImpairmentOfInvestments	(5.0)us-gaap_ImpairmentOfInvestments
Portion of OTTI losses recognized in other comprehensive income (“OCI”)		0	0	0		0	(0.2)	(0.7)	0	(0.9)	0	(0.9)	0	0.9	(2.2)
Net OTTI losses recognized in earnings		(0.5)	0	0		(0.2)	(0.2)	(0.9)	0	(1.1)	(0.5)	(1.3)	(1.3)	(1.8)	(2.8)
Net realized investment gains (losses), excluding OTTI losses		(5.3)	(1.9)	(35.1)		(5.2)	8.8	(15.5)	(37.0)	(6.7)	(42.3)	(11.9)	(63.7)	(1.2)	(31.2)
Net realized investment gains (losses)		(5.8)us-gaap_RealizedInvestmentGainsLosses	(1.9)us-gaap_RealizedInvestmentGainsLosses	(35.1)us-gaap_RealizedInvestmentGainsLosses		(5.4)us-gaap_RealizedInvestmentGainsLosses	8.6us-gaap_RealizedInvestmentGainsLosses	(16.4)us-gaap_RealizedInvestmentGainsLosses	(37.0)us-gaap_RealizedInvestmentGainsLosses	(7.8)us-gaap_RealizedInvestmentGainsLosses	(42.8)us-gaap_RealizedInvestmentGainsLosses	(13.2)us-gaap_RealizedInvestmentGainsLosses	(65.0)us-gaap_RealizedInvestmentGainsLosses	(3.0)us-gaap_RealizedInvestmentGainsLosses	(34.0)us-gaap_RealizedInvestmentGainsLosses
Total revenues	117.9us-gaap_Revenues	130.0us-gaap_Revenues	133.1us-gaap_Revenues	96.7us-gaap_Revenues	145.9us-gaap_Revenues	128.0us-gaap_Revenues	134.9us-gaap_Revenues	110.0us-gaap_Revenues	229.8us-gaap_Revenues	244.9us-gaap_Revenues	359.8us-gaap_Revenues	372.9us-gaap_Revenues	477.7us-gaap_Revenues	518.8us-gaap_Revenues	470.6us-gaap_Revenues
BENEFITS AND EXPENSES:
Policy benefits		95.6	84.9	72.1		90.5	90.0	90.7	157.0	180.7	252.6	271.2	397.7	277.6	389.3
Policy acquisition cost amortization		20.0	20.2	16.7		21.5	26.0	16.3	36.9	42.3	56.9	63.8	84.9	83.4	100.5
Other operating expenses		21.4us-gaap_OtherCostAndExpenseOperating	26.4us-gaap_OtherCostAndExpenseOperating	23.5us-gaap_OtherCostAndExpenseOperating		29.0us-gaap_OtherCostAndExpenseOperating	31.3us-gaap_OtherCostAndExpenseOperating	30.4us-gaap_OtherCostAndExpenseOperating	49.9us-gaap_OtherCostAndExpenseOperating	61.7us-gaap_OtherCostAndExpenseOperating	71.3us-gaap_OtherCostAndExpenseOperating	90.7us-gaap_OtherCostAndExpenseOperating	100.6us-gaap_OtherCostAndExpenseOperating	118.1us-gaap_OtherCostAndExpenseOperating	102.9us-gaap_OtherCostAndExpenseOperating
Total benefits and expenses	202.4us-gaap_BenefitsLossesAndExpenses	137.0us-gaap_BenefitsLossesAndExpenses	131.5us-gaap_BenefitsLossesAndExpenses	112.3us-gaap_BenefitsLossesAndExpenses	53.4us-gaap_BenefitsLossesAndExpenses	141.0us-gaap_BenefitsLossesAndExpenses	147.3us-gaap_BenefitsLossesAndExpenses	137.4us-gaap_BenefitsLossesAndExpenses	243.8us-gaap_BenefitsLossesAndExpenses	284.7us-gaap_BenefitsLossesAndExpenses	380.8us-gaap_BenefitsLossesAndExpenses	425.7us-gaap_BenefitsLossesAndExpenses	583.2us-gaap_BenefitsLossesAndExpenses	479.1us-gaap_BenefitsLossesAndExpenses	592.7us-gaap_BenefitsLossesAndExpenses
Income (loss) before income taxes		(7.0)	1.6	(15.6)		(13.0)	(12.4)	(27.4)	(14.0)	(39.8)	(21.0)	(52.8)	(105.5)	39.7	(122.1)
Income tax expense (benefit)	10.4us-gaap_IncomeTaxExpenseBenefit	(11.8)us-gaap_IncomeTaxExpenseBenefit	5.6us-gaap_IncomeTaxExpenseBenefit	(0.4)us-gaap_IncomeTaxExpenseBenefit	(7.1)us-gaap_IncomeTaxExpenseBenefit	1.2us-gaap_IncomeTaxExpenseBenefit	(16.9)us-gaap_IncomeTaxExpenseBenefit	(1.9)us-gaap_IncomeTaxExpenseBenefit	5.2us-gaap_IncomeTaxExpenseBenefit	(18.8)us-gaap_IncomeTaxExpenseBenefit	(6.6)us-gaap_IncomeTaxExpenseBenefit	(17.6)us-gaap_IncomeTaxExpenseBenefit	3.8us-gaap_IncomeTaxExpenseBenefit	(24.7)us-gaap_IncomeTaxExpenseBenefit	17.0us-gaap_IncomeTaxExpenseBenefit
Net income (loss)	(94.9)us-gaap_ProfitLoss	4.8us-gaap_ProfitLoss	(4.0)us-gaap_ProfitLoss	(15.2)us-gaap_ProfitLoss	99.6us-gaap_ProfitLoss	(14.2)us-gaap_ProfitLoss	4.5us-gaap_ProfitLoss	(25.5)us-gaap_ProfitLoss	(19.2)us-gaap_ProfitLoss	(21.0)us-gaap_ProfitLoss	(14.4)us-gaap_ProfitLoss	(35.2)us-gaap_ProfitLoss	(109.3)us-gaap_ProfitLoss	64.4us-gaap_ProfitLoss	(139.1)us-gaap_ProfitLoss
COMPREHENSIVE INCOME (LOSS):
Net income (loss)	(94.9)us-gaap_ProfitLoss	4.8us-gaap_ProfitLoss	(4.0)us-gaap_ProfitLoss	(15.2)us-gaap_ProfitLoss	99.6us-gaap_ProfitLoss	(14.2)us-gaap_ProfitLoss	4.5us-gaap_ProfitLoss	(25.5)us-gaap_ProfitLoss	(19.2)us-gaap_ProfitLoss	(21.0)us-gaap_ProfitLoss	(14.4)us-gaap_ProfitLoss	(35.2)us-gaap_ProfitLoss	(109.3)us-gaap_ProfitLoss	64.4us-gaap_ProfitLoss	(139.1)us-gaap_ProfitLoss
Unrealized investment gains (losses), net of related offsets		(6.1)	36.6	13.0		10.6	(14.6)	(9.8)	49.6	(24.4)	43.5	(13.8)	48.6	(33.1)	31.9
Unrealized investment gains (losses), net of related offsets		0.8	6.9	14.4		(0.2)	(12.0)	2.7	21.3	(9.3)	22.1	(9.5)	31.9	(11.6)	24.3
Other comprehensive income (loss), net of income taxes		(6.9)	29.7	(1.4)		10.8	(2.6)	(12.5)	28.3	(15.1)	21.4	(4.3)	16.7	(21.5)	7.6
Comprehensive income (loss)		(2.1)	25.7	(16.6)		(3.4)	1.9	(38.0)	9.1	(36.1)	7.0	(39.5)	(92.6)	42.9	(131.5)
As reported
REVENUES:
Premiums		3.0	4.7	2.8		3.1	5.1	3.1	7.5	8.2	10.5	11.3		13.9	8.5
Insurance and investment product fees		88.6	88.3	88.8		94.0	87.2	90.1	177.1	177.3	265.7	271.3		367.6	365.3
Net investment income		44.1	42.0	40.0		36.3	34.1	33.0	82.0	67.1	126.1	103.4		140.8	130.9
Net realized investment gains (losses):
Total other-than-temporary impairment (“OTTI”) losses		(0.5)	0	0		(0.2)	0	(0.3)	0	(0.3)	(0.5)	(0.5)		(1.1)	(5.0)
Portion of OTTI losses recognized in other comprehensive income (“OCI”)		0	0	0		0	(0.2)	(0.7)	0	(0.9)	0	(0.9)		0.9	(2.2)
Net OTTI losses recognized in earnings		(0.5)	0	0		(0.2)	(0.2)	(1.0)	0	(1.2)	(0.5)	(1.4)		(2.0)	(2.8)
Net realized investment gains (losses), excluding OTTI losses		(2.7)	(2.1)	(33.9)		(2.6)	10.9	(16.4)	(36.0)	(5.5)	(38.7)	(8.1)		5.4	(19.5)
Net realized investment gains (losses)		(3.2)	(2.1)	(33.9)		(2.8)	10.7	(17.4)	(36.0)	(6.7)	(39.2)	(9.5)		3.4	(22.3)
Total revenues		132.5	132.9	97.7		130.6	137.1	108.8	230.6	245.9	363.1	376.5		525.7	482.4
BENEFITS AND EXPENSES:
Policy benefits		96.9	81.0	76.1		91.8	91.4	88.5	157.1	179.9	254.0	271.7		286.5	396.8
Policy acquisition cost amortization		19.7	16.4	16.3		22.2	26.6	14.0	32.7	40.6	52.4	62.8		88.4	103.5
Other operating expenses		28.1	26.8	24.0		29.2	31.4	28.6	50.8	60.0	78.9	89.2		116.8	103.6
Total benefits and expenses		144.7	124.2	116.4		143.2	149.4	131.1	240.6	280.5	385.3	423.7		491.7	603.9
Income (loss) before income taxes		(12.2)	8.7	(18.7)		(12.6)	(12.3)	(22.3)	(10.0)	(34.6)	(22.2)	(47.2)		34.0	(121.5)
Income tax expense (benefit)		(15.5)	5.9	(1.9)		2.6	(16.9)	(1.9)	4.0	(18.8)	(11.5)	(16.2)		(21.7)	16.2
Net income (loss)		3.3	2.8	(16.8)		(15.2)	4.6	(20.4)	(14.0)	(15.8)	(10.7)	(31.0)		55.7	(137.7)
COMPREHENSIVE INCOME (LOSS):
Net income (loss)		3.3	2.8	(16.8)		(15.2)	4.6	(20.4)	(14.0)	(15.8)	(10.7)	(31.0)		55.7	(137.7)
Unrealized investment gains (losses), net of related offsets		(6.2)	38.7	11.1		9.9	(12.1)	(13.3)	49.8	(25.4)	43.6	(15.5)		(35.1)	33.7
Unrealized investment gains (losses), net of related offsets		2.5	6.4	14.0		(0.3)	(12.1)	2.7	20.4	(9.4)	22.9	(9.7)		(11.8)	24.9
Other comprehensive income (loss), net of income taxes		(8.7)	32.3	(2.9)		10.2	0	(16.0)	29.4	(16.0)	20.7	(5.8)		(23.3)	8.8
Comprehensive income (loss)		(5.4)	35.1	(19.7)		(5.0)	4.6	(36.4)	15.4	(31.8)	10.0	(36.8)		32.4	(128.9)
Correction of errors
Net realized investment gains (losses):
Net realized investment gains (losses)				(1.2)				1.0	(1.0)	(1.1)	(3.6)	(3.7)		(6.4)	(11.7)
BENEFITS AND EXPENSES:
Policy acquisition cost amortization				0.4				2.3	4.2	1.7	4.5	1.0		(5.0)	(3.0)
UL unlock \| Correction of errors
REVENUES:
Premiums		0	0	0		0	0	0	0	0	0	0		0	0
Insurance and investment product fees			0	0		0	0	0	0	0	0	0		(0.3)	0
Net investment income		0	0	0		0	0	0	0	0	0	0		0	0
Net realized investment gains (losses):
Total other-than-temporary impairment (“OTTI”) losses		0	0	0		0	0	0	0	0	0	0		0	0
Portion of OTTI losses recognized in other comprehensive income (“OCI”)		0	0	0		0	0	0	0	0	0	0		0	0
Net OTTI losses recognized in earnings		0	0	0		0	0	0	0	0	0	0		0	0
Net realized investment gains (losses), excluding OTTI losses		0	0	0		0	0	0	0	0	0	0		0	0
Net realized investment gains (losses)		0	0	0		0	0	0	0	0	0	0		0	0
Total revenues		0	0	0		0	0	0	0	0	0	0		(0.3)	0
BENEFITS AND EXPENSES:
Policy benefits		(0.3)	(0.4)	(0.2)		0	0	0	(0.6)	0	(0.9)	0		(6.1)	0
Policy acquisition cost amortization		0.3	(0.2)	0.1		0	0	0	(0.1)	0	0.2	0		(3.0)	0
Other operating expenses		0	0	0		0	0	0	0	0	0	0		(0.1)	0
Total benefits and expenses		0	(0.6)	(0.1)		0	0	0	(0.7)	0	(0.7)	0		(9.2)	0
Income (loss) before income taxes		0	0.6	0.1		0	0	0	0.7	0	0.7	0		8.9	0
Income tax expense (benefit)		0	0	0		0	0	0	0	0	0	0		0	0
Net income (loss)		0	0.6	0.1		0	0	0	0.7	0	0.7	0		8.9	0
COMPREHENSIVE INCOME (LOSS):
Net income (loss)		0	0.6	0.1		0	0	0	0.7	0	0.7	0		8.9	0
Unrealized investment gains (losses), net of related offsets		(0.1)	(0.3)	0.3			0	0	0	0	(0.1)	0		0.1	0
Unrealized investment gains (losses), net of related offsets		0	0	0			0	0	0	0	0	0		0	0
Other comprehensive income (loss), net of income taxes		(0.1)	(0.3)	0.3		0	0	0	0	0	(0.1)	0		0.1	0
Comprehensive income (loss)		(0.1)	0.3	0.4		0	0	0	0.7	0	0.6	0		9.0	0
Other adjustments \| Correction of errors
REVENUES:
Premiums		0	0	0		0	0	0	0	0	0	0		0	0
Insurance and investment product fees		0.1	0	0.2		0	0	0	0.2	0	0.3	0		(0.3)	(0.1)
Net investment income		0	0	0		0	(0.1)	0.2	0	0.1	0	0.1		0.1	0
Net realized investment gains (losses):
Total other-than-temporary impairment (“OTTI”) losses		0	0	0		0	0	0.1	0	0.1	0	0.1		0.2	0
Portion of OTTI losses recognized in other comprehensive income (“OCI”)		0	0	0		0	0	0	0	0	0	0		0	0
Net OTTI losses recognized in earnings		0	0	0		0	0	0.1	0	0.1	0	0.1		0.2	0
Net realized investment gains (losses), excluding OTTI losses		(2.6)	0.2	(1.2)		(2.6)	(2.1)	0.9	(1.0)	(1.2)	(3.6)	(3.8)		(6.6)	(11.7)
Net realized investment gains (losses)		(2.6)	0.2	(1.2)		(2.6)	(2.1)	1.0	(1.0)	(1.1)	(3.6)	(3.7)		(6.4)	(11.7)
Total revenues		(2.5)	0.2	(1.0)		(2.6)	(2.2)	1.2	(0.8)	(1.0)	(3.3)	(3.6)		(6.6)	(11.8)
BENEFITS AND EXPENSES:
Policy benefits		(1.0)	4.3	(3.8)		(1.3)	(1.4)	2.2	0.5	0.8	(0.5)	(0.5)		(2.8)	(7.5)
Policy acquisition cost amortization		0	4.0	0.3		(0.7)	(0.6)	2.3	4.3	1.7	4.3	1.0		(2.0)	(3.0)
Other operating expenses		(6.7)	(0.4)	(0.5)		(0.2)	(0.1)	1.8	(0.9)	1.7	(7.6)	1.5		1.4	(0.7)
Total benefits and expenses		(7.7)	7.9	(4.0)		(2.2)	(2.1)	6.3	3.9	4.2	(3.8)	2.0		(3.4)	(11.2)
Income (loss) before income taxes		5.2	(7.7)	3.0		(0.4)	(0.1)	(5.1)	(4.7)	(5.2)	0.5	(5.6)		(3.2)	(0.6)
Income tax expense (benefit)		3.7	(0.3)	1.5		(1.4)	0	0	1.2	0	4.9	(1.4)		(3.0)	0.8
Net income (loss)		1.5	(7.4)	1.5		1.0	(0.1)	(5.1)	(5.9)	(5.2)	(4.4)	(4.2)		(0.2)	(1.4)
COMPREHENSIVE INCOME (LOSS):
Net income (loss)		1.5	(7.4)	1.5		1.0	(0.1)	(5.1)	(5.9)	(5.2)	(4.4)	(4.2)		(0.2)	(1.4)
Unrealized investment gains (losses), net of related offsets		0.2	(1.8)	1.6		0.7	(2.5)	3.5	(0.2)	1.0	0	1.7		1.9	(1.8)
Unrealized investment gains (losses), net of related offsets		(1.7)	0.5	0.4		0.1	0.1	0	0.9	0.1	(0.8)	0.2		0.2	(0.6)
Other comprehensive income (loss), net of income taxes		1.9	(2.3)	1.2		0.6	(2.6)	3.5	(1.1)	0.9	0.8	1.5		1.7	(1.2)
Comprehensive income (loss)		$ 3.4	$ (9.7)	$ 2.7		$ 1.6	$ (2.7)	$ (1.6)	$ (7.0)	$ (4.3)	$ (3.6)	$ (2.7)		$ 1.5	$ (2.6)

The total amount of expense recognized during the period for future policy benefits, claims and claims adjustment costs, and for selling, general and administrative costs.

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- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References

+ Details

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- Definition

Amount of expense related to deferred policy acquisition costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 16

-Article 12

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-04.7(a))

-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 7

-Article 7

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 18

-Article 12

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=35755530&loc=d3e11264-158415

Reference 6: http://www.xbrl.org/2003/role/presentationRef

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