Investments (Tables)

9 Months Ended

Sep. 30, 2012

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 September 30, 2012:

	Amortized Cost		Gross Unrealized Capital Gains		Gross Unrealized Capital Losses		Embedded Derivatives(2)		Fair Value		OTTI(3)
Fixed maturities:
U.S. Treasuries	$	927.8	$	148.2	$	—	$	—	$	1,076.0	$	—
U.S. government agencies and authorities	379.2		21.5		—		—		400.7		—
State, municipalities and political subdivisions	77.2		14.1		—		—		91.3		—
U.S. corporate securities	8,901.7		1,169.8		11.0		—		10,060.5		—
Foreign securities(1):
Government	435.7		50.7		1.1		—		485.3		—
Other	4,427.5		497.6		18.6		—		4,906.5		—
Total foreign securities	4,863.2		548.3		19.7		—		5,391.8		—
Residential mortgage-backed securities:
Agency	1,794.7		200.1		3.6		34.0		2,025.2		0.6
Non-Agency	418.3		71.8		18.5		20.9		492.5		19.0
Total Residential mortgage-backed securities	2,213.0		271.9		22.1		54.9		2,517.7		19.6
Commercial mortgage-backed securities	786.8		84.6		0.2		—		871.2		4.4
Other asset-backed securities	477.7		26.0		10.1		—		493.6		3.5
Total fixed maturities, including securities pledged	18,626.6		2,284.4		63.1		54.9		20,902.8		27.5
Less: securities pledged	201.5		13.7		1.6		—		213.6		—
Total fixed maturities	18,425.1		2,270.7		61.5		54.9		20,689.2		27.5
Equity securities	130.1		12.4		0.1		—		142.4		—
Total fixed maturities and equity securities investments	$	18,555.2	$	2,283.1	$	61.6	$	54.9	$	20,831.6	$	27.5
(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, 2011:

	Amortized Cost		Gross Unrealized Capital Gains		Gross Unrealized Capital Losses		Embedded Derivatives(2)		Fair Value		OTTI(3)
Fixed maturities:
U.S. Treasuries	$	1,096.6	$	135.0	$	—	$	—	$	1,231.6	$	—
U.S. government agencies and authorities	379.7		31.0		—		—		410.7		—
State, municipalities and political subdivisions	95.1		10.9		—		—		106.0		—
U.S. corporate securities	8,166.9		770.8		31.1		—		8,906.6		—
Foreign securities(1):
Government	308.5		39.8		3.1		—		345.2		—
Other	4,352.5		328.8		38.4		—		4,642.9		—
Total foreign securities	4,661.0		368.6		41.5		—		4,988.1		—
Residential mortgage-backed securities:
Agency	1,442.0		218.7		3.4		39.4		1,696.7		0.7
Non-Agency	513.4		66.7		49.5		19.8		550.4		28.8
Total Residential mortgage-backed securities	1,955.4		285.4		52.9		59.2		2,247.1		29.5
Commercial mortgage-backed securities	866.1		51.0		5.8		—		911.3		4.4
Other asset-backed securities	441.5		19.4		22.1		—		438.8		4.2
Total fixed maturities, including securities pledged	17,662.3		1,672.1		153.4		59.2		19,240.2		38.1
Less: securities pledged	572.5		22.4		1.2		—		593.7		—
Total fixed maturities	17,089.8		1,649.7		152.2		59.2		18,646.5		38.1
Equity securities	131.8		13.1		—		—		144.9		—
Total fixed maturities and equity securities investments	$	17,221.6	$	1,662.8	$	152.2	$	59.2	$	18,791.4	$	38.1
(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.

Investments Classifed by Contractual Maturity Date

The amortized cost and fair value of fixed maturities, including securities pledged, as of September 30, 2012, 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	$	864.0	$	904.5
After one year through five years	3,786.9		4,074.0
After five years through ten years	5,248.3		5,892.1
After ten years	5,249.9		6,149.7
Mortgage-backed securities	2,999.8		3,388.9
Other asset-backed securities	477.7		493.6
Fixed maturities, including securities pledged	$	18,626.6	$	20,902.8

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 September 30, 2012 and December 31, 2011:

	Amortized Cost		Gross Unrealized Capital Gains		Gross Unrealized Capital Losses		Fair Value
2012
Communications	$	1,112.1	$	166.7	$	0.4	$	1,278.4
Financial	1,768.1		224.6		12.2		1,980.5
Industrial and other companies	7,353.3		862.5		6.0		8,209.8
Utilities	2,717.0		367.4		11.0		3,073.4
Transportation	378.7		46.2		—		424.9
Total	$	13,329.2	$	1,667.4	$	29.6	$	14,967.0
2011
Communications	$	1,108.8	$	116.3	$	2.0	$	1,223.1
Financial	1,948.9		133.2		39.6		2,042.5
Industrial and other companies	6,577.6		559.0		20.7		7,115.9
Utilities	2,527.2		259.2		6.4		2,780.0
Transportation	356.9		31.9		0.8		388.0
Total	$	12,519.4	$	1,099.6	$	69.5	$	13,549.5

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 September 30, 2012 and December 31, 2011:

	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
2012
U.S. corporate, state and municipalities	$	134.7	$	1.9	$	43.1	$	3.6	$	38.4	$	5.5	$	216.2	$	11.0
Foreign	70.3		4.1		28.8		2.2		84.1		13.4		183.2		19.7
Residential mortgage-backed	67.9		0.4		15.3		1.5		150.9		20.2		234.1		22.1
Commercial mortgage-backed	5.0		—		—		—		3.1		0.2		8.1		0.2
Other asset-backed	12.5		—		—		—		45.6		10.1		58.1		10.1
Total	$	290.4	$	6.4	$	87.2	$	7.3	$	322.1	$	49.4	$	699.7	$	63.1
2011
U.S. corporate, state and municipalities	$	595.1	$	22.8	$	46.5	$	3.0	$	52.9	$	5.3	$	694.5	$	31.1
Foreign	435.3		19.1		49.9		4.6		169.5		17.8		654.7		41.5
Residential mortgage-backed	49.4		1.6		97.0		5.2		175.4		46.1		321.8		52.9
Commercial mortgage-backed	28.3		1.8		69.0		2.5		8.9		1.5		106.2		5.8
Other asset-backed	32.6		0.2		4.9		1.3		44.1		20.6		81.6		22.1
Total	$	1,140.7	$	45.5	$	267.3	$	16.6	$	450.8	$	91.3	$	1,858.8	$	153.4

Risk Exposure to Securities Based on Credit Quality

The following tables summarize the Company's exposure to Other ABS holdings, excluding subprime exposure, by credit quality using NAIC designations, ARO ratings and vintage year as of September 30, 2012 and December 31, 2011:

	% of Total Other ABS
	NAIC Designation			ARO Ratings			Vintage
2012
	1	98.3	%	AAA	88.4	%	2012	20.1	%
	2	1.6	%	AA	2.0	%	2011	12.3	%
	3	0.1	%	A	7.9	%	2010	5.9	%
	4	—	%	BBB	1.6	%	2009	0.3	%
	5	—	%	BB and below	0.1	%	2008	9.5	%
	6	—	%		100.0	%	2007	23.1	%
		100.0	%				2006	6.1	%
							2005 and prior	22.7	%
								100.0	%
2011
	1	95.0	%	AAA	82.7	%	2011	14.3	%
	2	4.7	%	AA	1.2	%	2010	7.3	%
	3	—	%	A	8.4	%	2009	0.4	%
	4	0.3	%	BBB	7.4	%	2008	11.7	%
	5	—	%	BB and below	0.3	%	2007	30.3	%
	6	—	%		100.0	%	2006	6.8	%
		100.0	%				2005 and prior	29.2	%
								100.0	%

The following tables summarize the Company's exposure to CMBS holdings by credit quality using NAIC designations, ARO ratings and vintage year as of September 30, 2012 and December 31, 2011:

	% of Total CMBS
	NAIC Designation			ARO Ratings			Vintage
2012
	1	99.4	%	AAA	56.0	%	2007	27.1	%
	2	0.5	%	AA	2.4	%	2006	19.5	%
	3	0.1	%	A	22.7	%	2005 and prior	53.4	%
	4	—	%	BBB	6.8	%		100.0	%
	5	—	%	BB and below	12.1	%
	6	—	%		100.0	%
		100.0	%
2011
	1	97.4	%	AAA	63.7	%	2007	23.4	%
	2	0.9	%	AA	1.4	%	2006	18.2	%
	3	0.7	%	A	21.1	%	2005 and prior	58.4	%
	4	1.0	%	BBB	4.0	%		100.0	%
	5	—	%	BB and below	9.8	%
	6	—	%		100.0	%
		100.0	%

The following tables summarize the Company's exposure to subprime mortgage-backed securities by credit quality using NAIC designations, ARO ratings and vintage year as of September 30, 2012 and December 31, 2011:

	% of Total Subprime Mortgage-backed Securities
	NAIC Designation			ARO Ratings			Vintage
2012
	1	77.5	%	AAA	3.3	%	2007	8.5	%
	2	9.4	%	AA	—	%	2006	5.6	%
	3	4.9	%	A	17.6	%	2005 and prior	85.9	%
	4	7.1	%	BBB	19.5	%		100.0	%
	5	—	%	BB and below	59.6	%
	6	1.1	%		100.0	%
		100.0	%
2011
	1	75.8	%	AAA	7.5	%	2007	9.1	%
	2	5.3	%	AA	—	%	2006	4.5	%
	3	9.3	%	A	13.0	%	2005 and prior	86.4	%
	4	9.4	%	BBB	33.7	%		100.0	%
	5	—	%	BB and below	45.8	%
	6	0.2	%		100.0	%
		100.0	%

The following tables summarize the Company's exposure to Alt-A residential mortgage-backed securities by credit quality using NAIC designations, ARO ratings and vintage year as of September 30, 2012 and December 31, 2011:

	% of Total Alt-A Mortgage-backed Securities
	NAIC Designation			ARO Ratings			Vintage
2012
	1	42.0	%	AAA	0.3	%	2007	13.0	%
	2	12.0	%	AA	1.8	%	2006	29.1	%
	3	19.8	%	A	11.1	%	2005 and prior	57.9	%
	4	16.9	%	BBB	3.0	%		100.0	%
	5	8.6	%	BB and below	83.8	%
	6	0.7	%		100.0	%
		100.0	%
2011
	1	39.9	%	AAA	0.3	%	2007	12.0	%
	2	14.9	%	AA	3.1	%	2006	28.3	%
	3	14.7	%	A	13.1	%	2005 and prior	59.7	%
	4	21.1	%	BBB	4.6	%		100.0	%
	5	4.7	%	BB and below	78.9	%
	6	4.7	%		100.0	%
		100.0	%

Schedule of Mortgage Loans Real Estate and Valuation Allowance

The following table summarizes the Company’s investment in mortgage loans as of September 30, 2012 and December 31, 2011:

	2012			2011
Commercial mortgage loans	$	2,713.9		$	2,374.8
Collective valuation allowance	(1.6		)	(1.3		)
Total net commercial mortgage loans	$	2,712.3		$	2,373.5

The following table summarizes the activity in the allowance for losses for all commercial mortgage loans for the nine months ended September 30, 2012 and the year ended December 31, 2011:

	2012		2011
Collective valuation allowance for losses, beginning of period	$	1.3	$	1.3
Addition to / (release of) allowance for losses	0.3		—
Collective valuation allowance for losses, end of period	$	1.6	$	1.3

Impaired Financing Receivables

The following tables present information on interest income recognized on impaired and restructured loans for the three and nine months ended September 30, 2012 and 2011:

	Three Months Ended September 30,
	2012		2011
Interest income recognized on impaired loans, on an accrual basis	$	0.1	$	0.1
Interest income recognized on impaired loans, on a cash basis	0.1		0.2
	Nine Months Ended September 30,
	2012		2011
Interest income recognized on impaired loans, on an accrual basis	$	0.3	$	0.5
Interest income recognized on impaired loans, on a cash basis	0.3		0.5

The carrying values and unpaid principal balances of impaired mortgage loans were as follows as of September 30, 2012 and December 31, 2011:

	2012		2011
Impaired loans with allowances for losses	$	—	$	—
Impaired loans without allowances for losses	5.7		5.8
Subtotal	5.7		5.8
Less: Allowances for losses on impaired loans	—		—
Impaired loans, net	$	5.7	$	5.8
Unpaid principal balance of impaired loans	$	7.2	$	7.3

The following table presents information on impaired loans as of September 30, 2012 and December 31, 2011:

	2012		2011
Impaired loans, average investment during the period	$	5.8	$	7.7

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

Loan-to-value ("LTV") and debt service coverage ("DSC") ratios are measures commonly used to assess the risk and quality of mortgage loans. The LTV ratio, calculated at time of origination, is expressed as a percentage of the amount of the loan relative to the value of the underlying property. A LTV ratio in excess of 100% indicates the unpaid loan amount exceeds the underlying collateral. The DSC ratio, based upon the most recently received financial statements, is expressed as a percentage of the amount of a property’s net income to its debt service payments. A DSC ratio of less than 1.0 indicates that property’s operations do not generate sufficient income to cover debt payments. These ratios are utilized as part of the review process described above.

The following table presents the LTV ratios as of September 30, 2012 and December 31, 2011:

	2012(1)		2011(1)
Loan-to-Value Ratio:
0% - 50%	$	529.7	$	552.4
50% - 60%	793.2		771.5
60% - 70%	1,254.5		908.2
70% - 80%	120.3		125.2
80% and above	16.2		17.5
Total Commercial mortgage loans	$	2,713.9	$	2,374.8
(1) Balances do not include allowance for mortgage loan credit losses.

The following table presents the DSC ratios as of September 30, 2012 and December 31, 2011:

	2012(1)		2011(1)
Debt Service Coverage Ratio:
Greater than 1.5x	$	1,889.8	$	1,600.1
1.25x - 1.5x	405.0		408.1
1.0x - 1.25x	338.7		286.7
Less than 1.0x	80.4		79.9
Total Commercial mortgage loans	$	2,713.9	$	2,374.8
(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 September 30, 2012 and December 31, 2011:

	2012(1)				2011(1)
	Gross Carrying Value		% of Total		Gross Carrying Value		% of Total
Commercial Mortgage Loans by U.S. Region:
Pacific	$	559.0	20.7	%	$	514.7	21.7	%
South Atlantic	546.0		20.1	%	412.0		17.3	%
Middle Atlantic	326.0		12.0	%	325.9		13.7	%
East North Central	344.3		12.7	%	285.6		12.0	%
West South Central	391.0		14.4	%	358.4		15.1	%
Mountain	166.7		6.1	%	191.2		8.0	%
New England	113.3		4.2	%	94.2		4.0	%
West North Central	177.2		6.5	%	98.9		4.2	%
East South Central	90.4		3.3	%	93.9		4.0	%
Total Commercial mortgage loans	$	2,713.9	100.0	%	$	2,374.8	100.0	%
(1) Balances do not include allowance for mortgage loan credit losses.

	2012(1)				2011(1)
	Gross Carrying Value		% of Total		Gross Carrying Value		% of Total
Commercial Mortgage Loans by Property Type:
Industrial	$	1,017.6	37.5	%	$	956.4	40.3	%
Retail	671.8		24.8	%	544.7		22.9	%
Office	427.2		15.7	%	351.5		14.8	%
Apartments	297.5		11.0	%	281.7		11.9	%
Hotel/Motel	117.6		4.3	%	132.7		5.6	%
Mixed use	34.3		1.3	%	0.9		—	%
Other	147.9		5.4	%	106.9		4.5	%
Total Commercial mortgage loans	$	2,713.9	100.0	%	$	2,374.8	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 September 30, 2012 and December 31, 2011:

	2012(1)		2011(1)
Year of Origination:
2012	$	637.0	$	—
2011	847.2		857.9
2010	124.6		161.9
2009	73.3		92.6
2008	126.4		137.2
2007	131.0		202.1
2006 and prior	774.4		923.1
Total Commercial mortgage loans	$	2,713.9	$	2,374.8
(1) Balances do not include allowance for mortgage loan credit losses.

Other than Temporary Impairment, Credit Losses Recognized in Earnings

The following tables identify the Company’s credit-related and intent-related impairments included in the Condensed Consolidated Statements of Operations, excluding impairments included in Other comprehensive income by type for the three and nine months ended September 30, 2012 and 2011:

	Three Months Ended September 30,
	2012			2011
	Impairment		No. of Securities	Impairment		No. of Securities
U.S. corporate	$	1.3	1	$	6.1	4
Foreign(1)	—		—	16.1		12
Residential mortgage-backed	2.9		23	1.9		25
Commercial mortgage-backed	—		—	13.2		5
Other asset-backed	0.4		3	2.4		6
Total	$	4.6	27	$	39.7	52
(1) Primarily U.S. dollar denominated.
	Nine Months Ended September 30,
	2012			2011
	Impairment		No. of Securities	Impairment		No. of Securities
U.S. corporate	$	1.5	2	$	10.0	5
Foreign(1)	0.8		3	19.4		20
Residential mortgage-backed	4.5		30	5.2		30
Commercial mortgage-backed	—		—	21.3		6
Other asset-backed	0.8		4	21.8		51
Total	$	7.6	39	$	77.7	112
(1) Primarily U.S. dollar denominated.

Net Investment Income

The following tables summarize Net investment income for the three and nine months ended September 30, 2012 and 2011:

	Three Months Ended September 30,
	2012			2011
Fixed maturities	$	308.2		$	297.8
Equity securities, available-for-sale	2.6			3.2
Mortgage loans on real estate	35.0			30.7
Policy loans	3.3			3.8
Short-term investments and cash equivalents	0.3			0.4
Other	6.3			12.7
Gross investment income	355.7			348.6
Less: Investment expenses	(11.0		)	(11.9		)
Net investment income	$	344.7		$	336.7
	Nine Months Ended September 30,
	2012			2011
Fixed maturities	$	916.2		$	910.4
Equity securities, available-for-sale	6.7			11.7
Mortgage loans on real estate	106.1			86.3
Policy loans	9.9			10.3
Short-term investments and cash equivalents	0.8			1.1
Other	2.9			74.0
Gross investment income	1,042.6			1,093.8
Less: Investment expenses	(34.0		)	(33.4		)
Net investment income	$	1,008.6		$	1,060.4

Realized Gain (Loss) on Investments

Net realized capital gains (losses) were as follows for the three and nine months ended September 30, 2012 and 2011:

	Three Months Ended September 30,
	2012			2011
Fixed maturities, available-for-sale, including securities pledged	$	1.5		$	22.3
Fixed maturities, at fair value option	(31.7		)	(25.3		)
Equity securities, available-for-sale	(0.2		)	3.0
Derivatives	(12.7		)	(28.5		)
Embedded derivative - fixed maturities	(4.1		)	10.7
Embedded derivative - product guarantees	21.3			(148.8		)
Other investments	0.2			1.1
Net realized capital gains (losses)	$	(25.7	)	$	(165.5	)
After-tax net realized capital gains (losses)	$	(6.7	)	$	(33.7	)
	Nine Months Ended September 30,
	2012			2011
Fixed maturities, available-for-sale, including securities pledged	$	58.8		$	94.5
Fixed maturities, at fair value option	(78.0		)	(29.0		)
Equity securities, available-for-sale	(0.2		)	5.7
Derivatives	13.5			(68.4		)
Embedded derivative - fixed maturities	(4.3		)	9.1
Embedded derivative - product guarantees	110.8			(151.9		)
Other investments	(0.2		)	10.0
Net realized capital gains (losses)	$	100.4		$	(130.0	)
After-tax net realized capital gains (losses)	$	65.3		$	(23.5	)

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 nine months ended September 30, 2012 and 2011:

	Nine Months Ended September 30,
	2012		2011
Proceeds on sales	$	2,261.4	$	4,262.5
Gross gains	77.4		198.3
Gross losses	10.9		28.0

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 three and nine months ended September 30, 2012 and 2011:

	Three Months Ended September 30,
	2012			2011
	Impairment		No. of Securities	Impairment			No. of Securities
U.S. corporate	$	—	—	$	6.1		4
Foreign(1)	—		—	14.2			10
Residential mortgage-backed	—		—	—		*	3
Commercial mortgage-backed	—		—	13.2			5
Other asset-backed	—		—	2.2			4
Total	$	—	—	$	35.7		26
(1) Primarily U.S. dollar denominated.
* Less than $0.1.
	Nine Months Ended September 30,
	2012			2011
	Impairment		No. of Securities	Impairment			No. of Securities
U.S. corporate	$	0.2	1	$	10.0		5
Foreign(1)	0.8		3	15.4			17
Residential mortgage-backed	—		—	0.1			4
Commercial mortgage-backed	—		—	21.3			6
Other asset-backed	0.1		1	20.5			43
Total	$	1.1	5	$	67.3		75
(1) Primarily U.S. dollar denominated.

Credit related impairment

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

Other than Temporary Impairment, Credit Losses Recognized in Earnings

The following tables identify 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 three and nine months ended September 30, 2012 and 2011:

	Three Months Ended September 30,
	2012			2011
Balance at July 1	$	20.0		$	31.2
Additional credit impairments:
On securities not previously impaired	—			0.3
On securities previously impaired	3.1			1.7
Reductions:
Securities intent impaired	—			—
Securities sold, matured, prepaid or paid down	(2.5		)	(15.1		)
Balance at September 30	$	20.6		$	18.1
	Nine Months Ended September 30,
	2012			2011
Balance at January 1	$	19.5		$	50.7
Additional credit impairments:
On securities not previously impaired	0.1			0.6
On securities previously impaired	4.8			5.1
Reductions:
Securities intent impaired	—			(8.6		)
Securities sold, matured, prepaid or paid down	(3.8		)	(29.7		)
Balance at September 30	$	20.6		$	18.1

Duration

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

Schedule of Unrealized Loss on Investments

	Amortized Cost				Unrealized Capital Losses				Number of Securities
	< 20%		> 20%		< 20%		> 20%		< 20%	> 20%
2012
Six months or less below amortized cost	$	360.1	$	21.8	$	14.8	$	5.5	86	13
More than six months and twelve months or less below amortized cost	101.7		5.5		6.7		2.4		48	4
More than twelve months below amortized cost	205.5		68.2		8.6		25.1		92	29
Total	$	667.3	$	95.5	$	30.1	$	33.0	226	46
2011
Six months or less below amortized cost	$	1,197.2	$	60.1	$	46.9	$	16.9	256	31
More than six months and twelve months or less below amortized cost	270.3		25.1		13.9		9.1		52	9
More than twelve months below amortized cost	355.6		103.9		26.7		39.9		129	37
Total	$	1,823.1	$	189.1	$	87.5	$	65.9	437	77

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% for consecutive months as indicated in the tables below, were as follows as of September 30, 2012 and December 31, 2011:

	Amortized Cost				Unrealized Capital Losses				Number of Securities
	< 20%		> 20%		< 20%		> 20%		< 20%	> 20%
2012
U.S. corporate, state and municipalities	$	221.1	$	6.1	$	7.5	$	3.5	55	2
Foreign	162.6		40.3		7.1		12.6		25	10
Residential mortgage-backed	225.3		30.9		11.4		10.7		121	26
Commercial mortgage-backed	8.3		—		0.2		—		4	—
Other asset-backed	50.0		18.2		3.9		6.2		21	8
Total	$	667.3	$	95.5	$	30.1	$	33.0	226	46
2011
U.S. corporate, state and municipalities	$	717.7	$	7.9	$	28.8	$	2.3	119	3
Foreign	670.5		25.7		31.9		9.6		122	7
Residential mortgage-backed	276.5		98.2		19.0		33.9		119	47
Commercial mortgage-backed	110.1		1.9		5.4		0.4		16	1
Other asset-backed	48.3		55.4		2.4		19.7		61	19
Total	$	1,823.1	$	189.1	$	87.5	$	65.9	437	77