Investments (Tables)

3 Months Ended

Mar. 31, 2014

Available-for-sale Securities, Including Securities Pledged [Line Items]

Marketable Securities

Available-for-sale and fair value option ("FVO") fixed maturities and equity securities were as follows as of March 31, 2014:

	Amortized Cost		Gross Unrealized Capital Gains		Gross Unrealized Capital Losses		Embedded Derivatives(2)		Fair Value		OTTI(3)
Fixed maturities:
U.S. Treasuries	$	4,991.6	$	315.6	$	44.1	$	—	$	5,263.1	$	—
U.S. Government agencies and authorities	610.6		33.7		0.2		—		644.1		—
State, municipalities and political subdivisions	276.5		17.5		0.4		—		293.6		—
U.S. corporate securities	36,658.8		2,876.3		361.6		—		39,173.5		11.8
Foreign securities(1):
Government	886.3		45.0		24.1		—		907.2		—
Other	14,859.9		1,062.2		88.7		—		15,833.4		—
Total foreign securities	15,746.2		1,107.2		112.8		—		16,740.6		—
Residential mortgage-backed securities:
Agency	5,319.7		432.7		41.9		76.2		5,786.7		0.3
Non-Agency	1,054.7		175.3		10.9		46.9		1,266.0		93.3
Total Residential mortgage-backed securities	6,374.4		608.0		52.8		123.1		7,052.7		93.6
Commercial mortgage-backed securities	3,472.8		323.9		0.6		—		3,796.1		—
Other asset-backed securities	1,789.4		81.4		31.4		—		1,839.4		5.0
Total fixed maturities, including securities pledged	69,920.3		5,363.6		603.9		123.1		74,803.1		110.4
Less: Securities pledged	1,230.3		50.4		9.4		—		1,271.3		—
Total fixed maturities	68,690.0		5,313.2		594.5		123.1		73,531.8		110.4
Equity securities:
Common stock	194.3		2.3		0.2		—		196.4		—
Preferred stock	50.5		29.7		—		—		80.2		—
Total equity securities	244.8		32.0		0.2		—		276.6		—
Total fixed maturities and equity securities investments	$	68,934.8	$	5,345.2	$	594.7	$	123.1	$	73,808.4	$	110.4

⁽¹⁾ Primarily U.S. dollar denominated.

⁽²⁾ Embedded derivatives within fixed maturity securities are reported with the host investment. The changes in fair value of embedded derivatives are reported in Other net realized capital gains (losses) in the Condensed Consolidated Statements of Operations.

⁽³⁾ Represents Other-than-Temporary-Impairments ("OTTI") reported as a component of Other comprehensive income.

Available-for-sale and FVO fixed maturities and equity securities were as follows as of December 31, 2013:

	Amortized Cost		Gross Unrealized Capital Gains		Gross Unrealized Capital Losses		Embedded Derivatives(2)		Fair Value		OTTI(3)
Fixed maturities:
U.S. Treasuries	$	5,094.0	$	174.0	$	86.8	$	—	$	5,181.2	$	—
U.S. Government agencies and authorities	598.0		22.3		1.4		—		618.9		—
State, municipalities and political subdivisions	272.0		10.6		1.5		—		281.1		—
U.S. corporate securities	36,010.3		2,174.5		706.2		—		37,478.6		12.8
Foreign securities(1):
Government	1,044.0		49.6		42.2		—		1,051.4		—
Other	14,617.4		864.2		176.5		—		15,305.1		—
Total foreign securities	15,661.4		913.8		218.7		—		16,356.5		—
Residential mortgage-backed securities:
Agency	5,379.2		431.1		62.1		79.2		5,827.4		0.4
Non-Agency	1,101.1		166.2		18.3		47.3		1,296.3		103.2
Total Residential mortgage-backed securities	6,480.3		597.3		80.4		126.5		7,123.7		103.6
Commercial mortgage-backed securities	3,427.9		327.7		3.5		—		3,752.1		4.4
Other asset-backed securities	1,883.1		81.6		38.0		—		1,926.7		5.2
Total fixed maturities, including securities pledged	69,427.0		4,301.8		1,136.5		126.5		72,718.8		126.0
Less: Securities pledged	1,457.9		24.6		16.8		—		1,465.7		—
Total fixed maturities	67,969.1		4,277.2		1,119.7		126.5		71,253.1		126.0
Equity securities:
Common stock	214.3		5.1		0.9		—		218.5		—
Preferred stock	53.1		43.4		0.6		—		95.9		—
Total equity securities	267.4		48.5		1.5		—		314.4		—
Total fixed maturities and equity securities investments	$	68,236.5	$	4,325.7	$	1,121.2	$	126.5	$	71,567.5	$	126.0

⁽¹⁾ Primarily U.S. dollar denominated.

⁽²⁾ Embedded derivatives within fixed maturity securities are reported with the host investment. The changes in fair value of embedded derivatives are reported in Other net realized capital gains (losses) in the Condensed Consolidated Statements of Operations.

⁽³⁾ Represents OTTI reported as a component of Other comprehensive income.

Investments Classified by Contractual Maturity Date

The amortized cost and fair value of fixed maturities, including securities pledged, as of March 31, 2014, are shown below by contractual maturity. Actual maturities may differ from contractual maturities as securities may be restructured, called or prepaid. Mortgage-backed securities ("MBS") and Other asset-backed securities ("ABS") are shown separately because they are not due at a single maturity date.

	Amortized Cost		Fair Value
Due to mature:
One year or less	$	1,999.3	$	2,032.5
After one year through five years	13,858.5		14,748.5
After five years through ten years	21,329.9		22,070.1
After ten years	21,096.0		23,263.8
Mortgage-backed securities	9,847.2		10,848.8
Other asset-backed securities	1,789.4		1,839.4
Fixed maturities, including securities pledged	$	69,920.3	$	74,803.1

U.S. and Foreign Corporate Securities by Industry

The following tables set forth the composition of the U.S. and foreign corporate securities within the fixed maturity portfolio by industry category as of the dates indicated:

	Amortized Cost		Gross Unrealized Capital Gains		Gross Unrealized Capital Losses		Fair Value
March 31, 2014
Communications	$	3,966.9	$	403.4	$	29.2	$	4,341.1
Financial	6,990.9		675.5		42.7		7,623.7
Industrial and other companies	29,959.3		1,964.8		293.2		31,630.9
Utilities	9,165.5		778.4		70.8		9,873.1
Transportation	1,436.1		116.4		14.4		1,538.1
Total	$	51,518.7	$	3,938.5	$	450.3	$	55,006.9
December 31, 2013
Communications	$	4,016.2	$	293.0	$	73.4	$	4,235.8
Financial	6,640.7		566.6		72.6		7,134.7
Industrial and other companies	29,303.1		1,524.5		564.5		30,263.1
Utilities	9,200.6		570.0		142.2		9,628.4
Transportation	1,467.1		84.6		30.0		1,521.7
Total	$	50,627.7	$	3,038.7	$	882.7	$	52,783.7

Schedule of Unrealized Loss on Investments

Unrealized capital losses (including noncredit impairments), along with the fair value of fixed maturity securities, including securities pledged, by market sector and duration were as follows as of March 31, 2014:

	Six Months or Less Below Amortized Cost					More Than Six Months and Twelve Months or Less Below Amortized Cost				More Than Twelve Months Below Amortized Cost				Total
	Fair Value		Unrealized Capital Losses			Fair Value		Unrealized Capital Losses		Fair Value		Unrealized Capital Losses		Fair Value		Unrealized Capital Losses
U.S. Treasuries	$	1,315.7	$	7.9		$	927.9	$	29.4	$	45.1	$	6.8	$	2,288.7	$	44.1
U.S. Government agencies and authorities	6.8		—		*	57.5		0.2		—		—		64.3		0.2
U.S. corporate, state and municipalities	1,316.4		14.2			5,743.4		247.1		1,112.8		100.7		8,172.6		362.0
Foreign	345.1		2.4			1,842.9		84.5		295.9		25.9		2,483.9		112.8
Residential mortgage-backed	427.1		2.7			950.4		27.1		392.2		23.0		1,769.7		52.8
Commercial mortgage-backed	28.6		0.6			—		—		—		—		28.6		0.6
Other asset-backed	146.7		0.7			45.9		0.4		288.1		30.3		480.7		31.4
Total	$	3,586.4	$	28.5		$	9,568.0	$	388.7	$	2,134.1	$	186.7	$	15,288.5	$	603.9

* Less than $0.1

Unrealized capital losses (including noncredit impairments), along with the fair value of fixed maturity securities, including securities pledged, by market sector and duration were as follows as of December 31, 2013:

	Six Months or Less Below Amortized Cost					More Than Six Months and Twelve Months or Less Below Amortized Cost				More Than Twelve Months Below Amortized Cost				Total
	Fair Value		Unrealized Capital Losses			Fair Value		Unrealized Capital Losses		Fair Value		Unrealized Capital Losses		Fair Value		Unrealized Capital Losses
U.S. Treasuries	$	1,559.5	$	24.3		$	1,087.6	$	52.6	$	41.9	$	9.9	$	2,689.0	$	86.8
U.S. Government agencies and authorities	9.5		—		*	55.9		1.4		—		—		65.4		1.4
U.S. corporate, state and municipalities	3,524.9		78.5			6,893.9		519.6		821.9		109.6		11,240.7		707.7
Foreign	1,133.6		16.0			2,447.8		184.3		179.1		18.4		3,760.5		218.7
Residential mortgage-backed	919.1		8.3			1,019.6		40.6		377.9		31.5		2,316.6		80.4
Commercial mortgage-backed	235.8		3.3			—		—		6.2		0.2		242.0		3.5
Other asset-backed	150.6		0.9			105.5		1.5		299.3		35.6		555.4		38.0
Total	$	7,533.0	$	131.3		$	11,610.3	$	800.0	$	1,726.3	$	205.2	$	20,869.6	$	1,136.5

* Less than $0.1

Schedule of Loan-to-Value, Credit Enhancement and Fixed Floating Rates for RMBS and Other ABS in a Gross Unrealized Loss Position

The following tables summarize loan-to-value, credit enhancement and fixed floating rate details for residential mortgage-backed securities ("RMBS") and Other ABS in a gross unrealized loss position as of the dates indicated:

	Loan-to-Value Ratio
	Amortized Cost				Unrealized Capital Losses
March 31, 2014	< 20%		> 20%		< 20%		> 20%
RMBS and Other ABS(1)
Non-agency RMBS > 100%	$	38.9	$	2.6	$	4.2	$	0.6
Non-agency RMBS 90% - 100%	80.5		7.1		5.1		1.6
Non-agency RMBS 80% - 90%	99.9		4.8		9.1		1.2
Non-agency RMBS < 80%	281.0		6.8		15.7		2.1
Agency RMBS	1,605.8		4.5		39.3		2.6
Other ABS (Non-RMBS)	200.6		2.1		2.2		0.5
Total RMBS and Other ABS	$	2,306.7	$	27.9	$	75.6	$	8.6
	Credit Enhancement Percentage
	Amortized Cost				Unrealized Capital Losses
March 31, 2014	< 20%		> 20%		< 20%		> 20%
RMBS and Other ABS(1)
Non-agency RMBS 10% +	$	387.3	$	17.9	$	27.8	$	4.4
Non-agency RMBS 5% - 10%	20.6		—		0.7		—
Non-agency RMBS 0% - 5%	34.1		—		1.0		—
Non-agency RMBS 0%	58.3		3.4		4.6		1.1
Agency RMBS	1,605.8		4.5		39.3		2.6
Other ABS (Non-RMBS)	200.6		2.1		2.2		0.5
Total RMBS and Other ABS	$	2,306.7	$	27.9	$	75.6	$	8.6
	Fixed Rate/Floating Rate
	Amortized Cost				Unrealized Capital Losses
March 31, 2014	< 20%		> 20%		< 20%		> 20%
Fixed Rate	$	1,317.3	$	4.2	$	36.3	$	1.4
Floating Rate	989.4		23.7		39.3		7.2
Total	$	2,306.7	$	27.9	$	75.6	$	8.6

⁽¹⁾ For purposes of this table, subprime mortgages are included in Non-agency RMBS categories.

	Loan-to-Value Ratio
	Amortized Cost				Unrealized Capital Losses
December 31, 2013	< 20%		> 20%		< 20%		> 20%
RMBS and Other ABS(1)
Non-agency RMBS > 100%	$	75.7	$	36.4	$	2.9	$	8.3
Non-agency RMBS 90% - 100%	156.8		24.1		8.6		5.7
Non-agency RMBS 80% - 90%	151.3		5.9		8.4		1.7
Non-agency RMBS < 80%	284.7		8.0		15.5		2.2
Agency RMBS	2,008.9		11.3		57.9		4.2
Other ABS (Non-RMBS)	225.2		2.1		2.5		0.5
Total RMBS and Other ABS	$	2,902.6	$	87.8	$	95.8	$	22.6
	Credit Enhancement Percentage
	Amortized Cost				Unrealized Capital Losses
December 31, 2013	< 20%		> 20%		< 20%		> 20%
RMBS and Other ABS(1)
Non-agency RMBS 10% +	$	407.1	$	47.7	$	27.6	$	11.1
Non-agency RMBS 5% - 10%	43.9		0.8		1.2		0.2
Non-agency RMBS 0% - 5%	90.4		3.9		1.9		0.8
Non-agency RMBS 0%	127.1		22.0		4.7		5.8
Agency RMBS	2,008.9		11.3		57.9		4.2
Other ABS (Non-RMBS)	225.2		2.1		2.5		0.5
Total RMBS and Other ABS	$	2,902.6	$	87.8	$	95.8	$	22.6
	Fixed Rate/Floating Rate
	Amortized Cost				Unrealized Capital Losses
December 31, 2013	< 20%		> 20%		< 20%		> 20%
Fixed Rate	$	1,723.7	$	4.4	$	50.5	$	1.6
Floating Rate	1,178.9		83.4		45.3		21.0
Total	$	2,902.6	$	87.8	$	95.8	$	22.6

⁽¹⁾ For purposes of this table, subprime mortgages are included in Non-agency RMBS categories.

Schedule of Mortgage Loans Real Estate and Valuation Allowance

The following table summarizes the activity in the allowance for losses for all commercial mortgage loans for the periods indicated:

	March 31, 2014			December 31, 2013
Collective valuation allowance for losses, balance at January 1	$	3.8		$	3.9
Addition to (reduction of) allowance for losses	(0.4		)	(0.1		)
Collective valuation allowance for losses, end of period	$	3.4		$	3.8

The following table summarizes the Company's investment in mortgage loans as of the dates indicated:

	March 31, 2014			December 31, 2013
Commercial mortgage loans	$	9,261.5		$	9,316.0
Collective valuation allowance	(3.4		)	(3.8		)
Total net commercial mortgage loans	$	9,258.1		$	9,312.2

Impaired Financing Receivables

The carrying values and unpaid principal balances of impaired mortgage loans were as follows as of the dates indicated:

	March 31, 2014		December 31, 2013
Impaired loans with allowances for losses	$	—	$	—
Impaired loans without allowances for losses	94.2		94.3
Subtotal	94.2		94.3
Less: Allowances for losses on impaired loans	—		—
Impaired loans, net	$	94.2	$	94.3
Unpaid principal balance of impaired loans	$	96.6	$	96.7

Past Due Financing Receivables, Impaired Financing Receivables, Troubled Debt Restructurings on Financing Receivables, and Loans in Foreclosure

The following table presents information on impaired loans, restructured loans, loans 90 days or more past due and loans in foreclosure as of the dates indicated:

	March 31, 2014		December 31, 2013
Troubled debt restructured loans	$	86.6	$	86.6
Loans 90 days or more past due, interest no longer accruing, at amortized cost	—		5.1
Loans in foreclosure, at amortized cost	—		—
Unpaid principal balance of loans 90 days or more past due, interest no longer accruing	—		5.1

Interest Income Recognized on Impaired and Restructured Loans

The following table presents information on the average investment during the period in impaired loans and interest income recognized on impaired and troubled debt restructured loans for the periods indicated:

	Three Months Ended March 31,
	2014		2013
Impaired loans, average investment during the period (amortized cost) (1)	$	94.2	$	16.9
Interest income recognized on impaired loans, on an accrual basis (1)	1.3		0.2
Interest income recognized on impaired loans, on a cash basis (1)	1.0		0.2
Interest income recognized on troubled debt restructured loans, on an accrual basis	1.2		—

⁽¹⁾Includes amounts for Troubled debt restructured loans.

Loans Receivable, Grouped by Loan to Value and Debt Service Coverage Ratio

The following table presents the LTV ratios as of the dates indicated:

	March 31, 2014 (1)		December 31, 2013(1)
Loan-to-Value Ratio:
0% - 50%	$	1,604.3	$	1,782.6
50% - 60%	2,484.6		2,390.0
60% - 70%	4,708.8		4,668.3
70% - 80%	445.1		455.8
80% and above	18.7		19.3
Total Commercial mortgage loans	$	9,261.5	$	9,316.0

⁽¹⁾ Balances do not include allowance for mortgage loan credit losses.

The following table presents the DSC ratios as of the dates indicated:

	March 31, 2014 (1)		December 31, 2013(1)
Debt Service Coverage Ratio:
Greater than 1.5x	$	6,333.1	$	6,346.5
1.25x - 1.5x	1,515.3		1,520.9
1.0x - 1.25x	973.2		980.6
Less than 1.0x	439.7		467.8
Commercial mortgage loans secured by land or construction loans	0.2		0.2
Total Commercial mortgage loans	$	9,261.5	$	9,316.0

⁽¹⁾ Balances do not include allowance for mortgage loan credit losses.

Mortgage Loans by Geographic Location of Collateral

Properties collateralizing mortgage loans are geographically dispersed throughout the United States, as well as diversified by property type, as reflected in the following tables as of the dates indicated:

	March 31, 2014 (1)				December 31, 2013(1)
	Gross Carrying Value		% of Total		Gross Carrying Value		% of Total
Commercial Mortgage Loans by U.S. Region:
Pacific	$	2,369.2	25.6	%	$	2,281.8	24.5	%
South Atlantic	1,964.6		21.2	%	1,936.0		20.8	%
Middle Atlantic	1,113.2		12.0	%	1,112.0		11.9	%
West South Central	1,112.7		12.0	%	1,122.3		12.0	%
East North Central	1,055.6		11.4	%	1,037.5		11.1	%
Mountain	771.7		8.3	%	790.4		8.5	%
West North Central	525.6		5.7	%	517.2		5.6	%
East South Central	198.7		2.2	%	200.7		2.2	%
New England	150.2		1.6	%	318.1		3.4	%
Total Commercial mortgage loans	$	9,261.5	100.0	%	$	9,316.0	100.0	%

⁽¹⁾ Balances do not include allowance for mortgage loan credit losses.

Mortgage Loans by Property Type of Collateral

	March 31, 2014 (1)				December 31, 2013(1)
	Gross Carrying Value		% of Total		Gross Carrying Value		% of Total
Commercial Mortgage Loans by Property Type:
Retail	$	2,951.0	31.9	%	$	2,936.9	31.5	%
Industrial	2,818.6		30.4	%	2,848.0		30.6	%
Apartments	1,348.7		14.6	%	1,296.1		13.9	%
Office	1,089.0		11.7	%	1,242.2		13.3	%
Hotel/Motel	382.1		4.1	%	430.6		4.6	%
Mixed Use	305.8		3.3	%	184.1		2.0	%
Other	366.3		4.0	%	378.1		4.1	%
Total Commercial mortgage loans	$	9,261.5	100.0	%	$	9,316.0	100.0	%

⁽¹⁾ Balances do not include allowance for mortgage loan credit losses.

Mortgage Loans by Year of Origination

The following table sets forth the breakdown of mortgages by year of origination as of the dates indicated:

	March 31, 2014 (1)		December 31, 2013(1)
Year of Origination:
2014	$	252.9	$	—
2013	2,187.0		2,199.8
2012	1,731.5		1,743.3
2011	1,804.9		1,835.9
2010	394.4		409.8
2009	148.9		149.5
2008 and prior	2,741.9		2,977.7
Total Commercial mortgage loans	$	9,261.5	$	9,316.0

⁽¹⁾ Balances do not include allowance for mortgage loan credit losses.

Other than Temporary Impairment, Credit Losses Recognized in Earnings

The following table identifies the Company's credit-related and intent-related impairments included in the Condensed Consolidated Statements of Operations, excluding impairments included in Other comprehensive income (loss) by type for the periods indicated:

	Three Months Ended March 31,
	2014			2013
	Impairment		No. of Securities	Impairment		No. of Securities
U.S. corporate	$	0.4	1	$	—	—
Residential mortgage-backed	1.6		37	3.6		74
Commercial mortgage-backed	0.2		2	0.1		2
Other asset-backed	0.1		2	7.3		2
Equity	1.0		2	—		—
Total	$	3.3	44	$	11.0	78

Net Investment Income

The following table summarizes Net investment income for the periods indicated:

	Three Months Ended March 31,
	2014		2013
Fixed maturities	$	984.8	$	1,012.6
Equity securities, available-for-sale	3.8		2.6
Mortgage loans on real estate	115.3		118.2
Policy loans	28.0		29.9
Short-term investments and cash equivalents	0.8		0.9
Other	14.1		35.9
Gross investment income	1,146.8		1,200.1
Less: investment expenses	1.2		1.4
Net investment income	$	1,145.6	$	1,198.7

Realized Gain (Loss) on Investments

Net realized capital gains (losses) were as follows for the periods indicated:

	Three Months Ended March 31,
	2014			2013
Fixed maturities, available-for-sale, including securities pledged	$	13.7		$	9.4
Fixed maturities, at fair value option	(18.9		)	(107.6		)
Equity securities, available-for-sale	17.1			0.2
Derivatives	53.8			(1,099.7		)
Embedded derivative - fixed maturities	(3.3		)	(23.3		)
Embedded derivative - product guarantees	(255.1		)	346.3
Other investments	2.1			(0.1		)
Net realized capital gains (losses)	$	(190.6	)	$	(874.8	)
After-tax net realized capital gains (losses)	$	(118.3	)	$	(568.7	)

Gain (Loss) on Investments

Proceeds from the sale of fixed maturities and equity securities, available-for-sale and the related gross realized gains and losses, before tax, were as follows for the periods indicated:

	Three Months Ended March 31,
	2014		2013
Proceeds on sales	$	1,494.9	$	3,212.7
Gross gains	39.7		42.0
Gross losses	19.8		14.4

Past Due Financing Receivables [Table Text Block]

The following table presents the aging of past due mortgage loans at carrying value as of the dates indicated:

($ in millions)	30 days or less past due		31 to 90 days past due		91 to 180 days past due		181 days or more past due		Total
As of March 31, 2014	$	—	$	—	$	—	$	—	$	—
As of December 31, 2013	—		5.1		—		—		5.1

Intent related impairment

Available-for-sale Securities, Including Securities Pledged [Line Items]

Other than Temporary Impairment, Credit Losses Recognized in Earnings

The following tables summarize these intent impairments, which are also recognized in earnings, by type for the periods indicated:

	Three Months Ended March 31,
	2014			2013
	Impairment		No. of Securities	Impairment		No. of Securities
Commercial mortgage-backed	$	0.2	2	$	0.1	2
Other asset-backed	—		—	7.3		2
Total	$	0.2	2	$	7.4	4

Credit related impairment

Available-for-sale Securities, Including Securities Pledged [Line Items]

Other than Temporary Impairment, Credit Losses Recognized in Earnings

The following table identifies the amount of credit impairments on fixed maturities for which a portion of the OTTI loss was recognized in Other comprehensive income (loss) and the corresponding changes in such amounts for the periods indicated:

	Three Months Ended March 31,
	2014			2013
Balance at January 1	$	102.8		$	114.7
Additional credit impairments:
On securities not previously impaired	1.1			0.2
On securities previously impaired	1.0			3.0
Reductions:
Securities intent impaired	—			—
Securities sold, matured, prepaid or paid down	(3.8		)	(5.5		)
Balance at March 31	$	101.1		$	112.4

Duration

Available-for-sale Securities, Including Securities Pledged [Line Items]

Schedule of Unrealized Loss on Investments

Unrealized capital losses (including noncredit impairments) in fixed maturities, including securities pledged, for instances in which fair value declined below amortized cost by greater than or less than 20% for consecutive months as indicated in the tables below, were as follows as of the dates indicated:

	Amortized Cost				Unrealized Capital Losses				Number of Securities
	< 20%		> 20%		< 20%		> 20%		< 20%	> 20%
March 31, 2014
Six months or less below amortized cost	$	3,892.3	$	35.4	$	69.1	$	8.5	322	9
More than six months and twelve months or less below amortized cost	9,935.5		12.9		381.6		4.1		622	5
More than twelve months below amortized cost	2,004.7		11.6		136.9		3.7		338	15
Total	$	15,832.5	$	59.9	$	587.6	$	16.3	1,282	29
December 31, 2013
Six months or less below amortized cost	$	7,883.3	$	80.5	$	166.0	$	18.6	570	20
More than six months and twelve months or less below amortized cost	12,339.7		67.6		776.8		16.7		798	8
More than twelve months below amortized cost	1,579.2		55.8		144.5		13.9		302	22
Total	$	21,802.2	$	203.9	$	1,087.3	$	49.2	1,670	50

Market Sector (Type of Security)

Available-for-sale Securities, Including Securities Pledged [Line Items]

Schedule of Unrealized Loss on Investments

Unrealized capital losses (including noncredit impairments) in fixed maturities, including securities pledged, by market sector for instances in which fair value declined below amortized cost by greater than or less than 20% were as follows as of the dates indicated:

	Amortized Cost					Unrealized Capital Losses					Number of Securities
	< 20%		> 20%			< 20%		> 20%			< 20%	> 20%
March 31, 2014
U.S. Treasuries	$	2,332.8	$	—		$	44.1	$	—		28	—
U.S. Government agencies and authorities	64.5		—			0.2		—			3	—
U.S. corporate, state and municipalities	8,506.0		28.6			355.1		6.9			520	3
Foreign	2,593.3		3.4			112.0		0.8			210	1
Residential mortgage-backed	1,814.6		7.9			49.0		3.8			416	15
Commercial mortgage-backed	29.2		—		*	0.6		—		*	8	1
Other asset-backed	492.1		20.0			26.6		4.8			97	9
Total	$	15,832.5	$	59.9		$	587.6	$	16.3		1,282	29
December 31, 2013
U.S. Treasuries	$	2,750.5	$	25.3		$	81.4	$	5.4		32	1
U.S. Government agencies and authorities	66.8		—			1.4		—			3	—
U.S. corporate, state and municipalities	11,892.6		55.8			694.2		13.5			744	5
Foreign	3,944.2		35.0			211.0		7.7			300	6
Residential mortgage-backed	2,361.4		35.6			70.2		10.2			471	25
Commercial mortgage-backed	245.5		—			3.5		—			16	—
Other asset-backed	541.2		52.2			25.6		12.4			104	13
Total	$	21,802.2	$	203.9		$	1,087.3	$	49.2		1,670	50

* Less than $0.1.