Investments (Tables)

6 Months Ended

Jun. 30, 2015

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 June 30, 2015:

	Amortized Cost		Gross Unrealized Capital Gains		Gross Unrealized Capital Losses		Embedded Derivatives(2)		Fair Value		OTTI(3)
Fixed maturities:
U.S. Treasuries	$	574.5	$	94.1	$	0.1	$	—	$	668.5	$	—
U.S. Government agencies and authorities	45.5		0.1		—		—		45.6		—
State, municipalities and political subdivisions	346.9		10.7		8.5		—		349.1		—
U.S. corporate public securities	8,655.7		482.3		111.5		—		9,026.5		1.4
U.S. corporate private securities	2,194.6		100.8		34.2		—		2,261.2		—
Foreign corporate public securities and foreign governments(1)	2,832.8		127.0		64.2		—		2,895.6		—
Foreign corporate private securities(1)	2,739.5		151.3		11.9		—		2,878.9		—
Residential mortgage-backed securities:
Agency	1,545.5		128.3		4.6		14.0		1,683.2		0.2
Non-Agency	199.4		48.9		1.9		11.1		257.5		7.1
Total Residential mortgage-backed securities	1,744.9		177.2		6.5		25.1		1,940.7		7.3
Commercial mortgage-backed securities	1,044.2		55.1		6.1		—		1,093.2		6.7
Other asset-backed securities	308.2		12.8		1.4		—		319.6		2.6
Total fixed maturities, including securities pledged	20,486.8		1,211.4		244.4		25.1		21,478.9		18.0
Less: Securities pledged	176.2		15.1		5.1		—		186.2		—
Total fixed maturities	20,310.6		1,196.3		239.3		25.1		21,292.7		18.0
Equity securities	106.6		14.7		—		—		121.3		—
Total fixed maturities and equity securities investments	$	20,417.2	$	1,211.0	$	239.3	$	25.1	$	21,414.0	$	18.0

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

Available-for-sale and FVO fixed maturities and equity securities were as follows as of December 31, 2014:

	Amortized Cost		Gross Unrealized Capital Gains		Gross Unrealized Capital Losses		Embedded Derivatives(2)		Fair Value		OTTI(3)
Fixed maturities:
U.S. Treasuries	$	649.0	$	124.1	$	—	$	—	$	773.1	$	—
U.S. Government agencies and authorities	45.7		0.9		—		—		46.6		—
State, municipalities and political subdivisions	259.0		18.3		0.1		—		277.2		—
U.S. corporate public securities	8,345.9		762.9		40.2		—		9,068.6		1.5
U.S. corporate private securities	2,020.8		139.5		8.9		—		2,151.4		—
Foreign corporate public securities and foreign governments(1)	2,778.3		159.1		50.3		—		2,887.1		—
Foreign corporate private securities(1)	2,707.1		189.4		5.7		—		2,890.8		—
Residential mortgage-backed securities:
Agency	1,613.5		125.4		3.6		15.7		1,751.0		0.2
Non-Agency	227.9		54.6		2.2		12.1		292.4		8.7
Total Residential mortgage-backed securities	1,841.4		180.0		5.8		27.8		2,043.4		8.9
Commercial mortgage-backed securities	998.9		79.2		0.1		—		1,078.0		6.7
Other asset-backed securities	389.0		13.1		1.7		—		400.4		2.6
Total fixed maturities, including securities pledged	20,035.1		1,666.5		112.8		27.8		21,616.6		19.7
Less: Securities pledged	224.4		17.8		6.9		—		235.3		—
Total fixed maturities	19,810.7		1,648.7		105.9		27.8		21,381.3		19.7
Equity securities	107.4		14.5		—		—		121.9		—
Total fixed maturities and equity securities investments	$	19,918.1	$	1,663.2	$	105.9	$	27.8	$	21,503.2	$	19.7

⁽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 (loss).

Investments Classified by Contractual Maturity Date

The amortized cost and fair value of fixed maturities, including securities pledged, as of June 30, 2015, 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	$	544.7	$	552.7
After one year through five years	4,213.5		4,435.2
After five years through ten years	6,107.0		6,301.3
After ten years	6,524.3		6,836.2
Mortgage-backed securities	2,789.1		3,033.9
Other asset-backed securities	308.2		319.6
Fixed maturities, including securities pledged	$	20,486.8	$	21,478.9

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
June 30, 2015
Communications	$	1,186.8	$	81.9	$	15.4	$	1,253.3
Financial	2,395.4		164.0		11.4		2,548.0
Industrial and other companies	9,580.0		401.7		167.3		9,814.4
Utilities	2,437.1		166.7		16.2		2,587.6
Transportation	484.4		24.6		5.4		503.6
Total	$	16,083.7	$	838.9	$	215.7	$	16,706.9
December 31, 2014
Communications	$	1,226.1	$	136.8	$	2.4	$	1,360.5
Financial	2,310.5		221.4		1.6		2,530.3
Industrial and other companies	8,962.6		569.4		90.0		9,442.0
Utilities	2,555.7		259.2		4.3		2,810.6
Transportation	450.7		40.3		1.3		489.7
Total	$	15,505.6	$	1,227.1	$	99.6	$	16,633.1

Schedule of Securities Borrowed Under Securities Lending Transactions [Table Text Block]

The following table sets forth borrowings under securities lending transactions by class of collateral pledged for the dates indicated:

	June 30, 2015		December 31, 2014
U.S. Treasuries	$	—	$	55.7
U.S. corporate public securities	60.3		68.8
Foreign corporate public securities and foreign governments	69.2		57.5
Payables under securities loan agreements	$	129.5	$	182.0

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 June 30, 2015:

	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	$	15.8	$	0.1		$	—	$	—		$	—	$	—	$	15.8	$	0.1
U.S. Government, agencies and authorities	—		—			—		—			—		—		—		—
State, municipalities and political subdivisions	218.9		8.5			—		—			—		—		218.9		8.5
U.S. corporate public securities	2,521.8		86.4			149.6		13.3			143.8		11.8		2,815.2		111.5
U.S. corporate private securities	579.1		27.0			17.4		1.6			18.9		5.6		615.4		34.2
Foreign corporate public securities and foreign governments	812.4		24.6			178.9		27.3			103.3		12.3		1,094.6		64.2
Foreign corporate private securities	344.4		9.0			13.7		1.3			9.6		1.6		367.7		11.9
Residential mortgage-backed	80.3		1.1			11.9		0.6			132.5		4.8		224.7		6.5
Commercial mortgage-backed	248.7		6.1			—		—			—		—		248.7		6.1
Other asset-backed	1.2		—		*	0.1		—		*	17.8		1.4		19.1		1.4
Total	$	4,822.6	$	162.8		$	371.6	$	44.1		$	425.9	$	37.5	$	5,620.1	$	244.4
*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, 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	$	12.4	$	—	*	$	—	$	—	$	—	$	—	$	12.4	$	—	*
U.S. Government, agencies and authorities	2.3		—		*	—		—		—		—		2.3		—		*
State, municipalities and political subdivisions	22.5		0.1			—		—		—		—		22.5		0.1
U.S. corporate public securities	611.8		18.0			14.9		1.4		612.8		20.8		1,239.5		40.2
U.S. corporate private securities	160.3		2.0			19.9		0.1		100.0		6.8		280.2		8.9
Foreign corporate public securities and foreign governments	545.4		33.5			9.7		0.2		324.4		16.6		879.5		50.3
Foreign corporate private securities	125.6		2.2			—		—		25.8		3.5		151.4		5.7
Residential mortgage-backed	94.5		0.7			25.2		0.6		163.1		4.5		282.8		5.8
Commercial mortgage-backed	59.1		0.1			—		—		—		—		59.1		0.1
Other asset-backed	27.0		0.1			—		—		18.4		1.6		45.4		1.7
Total	$	1,660.9	$	56.7		$	69.7	$	2.3	$	1,244.5	$	53.8	$	2,975.1	$	112.8
*Less than $0.1

Schedule of Mortgage Loans Real Estate and Valuation Allowance

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

	June 30, 2015			December 31, 2014
Commercial mortgage loans	$	3,732.1		$	3,514.1
Collective valuation allowance for losses	(1.1		)	(1.1		)
Total net commercial mortgage loans	$	3,731.0		$	3,513.0

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

	June 30, 2015		December 31, 2014
Collective valuation allowance for losses, balance at January 1	$	1.1	$	1.2
Addition to (reduction of) allowance for losses	—		(0.1		)
Collective valuation allowance for losses, end of period	$	1.1	$	1.1

Impaired Financing Receivables

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

	June 30, 2015		December 31, 2014
Impaired loans without allowances for losses	$	20.7	$	32.4
Less: Allowances for losses on impaired loans	—		—
Impaired loans, net	$	20.7	$	32.4
Unpaid principal balance of impaired loans	$	22.2	$	33.9

The following tables present 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 June 30,
	2015		2014
Impaired loans, average investment during the period (amortized cost)(1)	$	20.7	$	40.0
Interest income recognized on impaired loans, on an accrual basis(1)	0.3		0.6
Interest income recognized on impaired loans, on a cash basis(1)	0.3		0.6
Interest income recognized on troubled debt restructured loans, on an accrual basis	0.2		0.5
	Six Months Ended June 30,
	2015		2014
Impaired loans, average investment during the period (amortized cost)(1)	$	26.5	$	40.0
Interest income recognized on impaired loans, on an accrual basis(1)	0.7		1.2
Interest income recognized on impaired loans, on a cash basis(1)	0.8		1.0
Interest income recognized on troubled debt restructured loans, on an accrual basis	0.5		1.0
(1)Includes amounts for Troubled debt restructured loans.

Troubled Debt Restructurings on Financing Receivables

The following table presents information on restructured loans as of the dates indicated:

	June 30, 2015		December 31, 2014
Troubled debt restructured loans	$	15.7	$	27.3

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

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

	June 30, 2015(1)		December 31, 2014(1)
Loan-to-Value Ratio:
0% - 50%	$	420.5	$	411.0
>50% - 60%	921.1		824.1
>60% - 70%	2,228.9		2,107.9
>70% - 80%	150.8		159.7
>80% and above	10.8		11.4
Total Commercial mortgage loans	$	3,732.1	$	3,514.1

⁽¹⁾ Balances do not include collective valuation allowance for losses.

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

	June 30, 2015(1)		December 31, 2014(1)
Debt Service Coverage Ratio:
Greater than 1.5x	$	2,732.2	$	2,600.1
>1.25x - 1.5x	640.0		520.0
>1.0x - 1.25x	236.5		258.7
Less than 1.0x	108.4		131.3
Commercial mortgage loans secured by land or construction loans	15.0		4.0
Total Commercial mortgage loans	$	3,732.1	$	3,514.1

⁽¹⁾ Balances do not include collective valuation allowance for 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:

	June 30, 2015(1)				December 31, 2014(1)
	Gross Carrying Value		% of Total		Gross Carrying Value		% of Total
Commercial Mortgage Loans by U.S. Region:
Pacific	$	891.5	23.9	%	$	802.6	22.8	%
South Atlantic	846.4		22.7	%	746.5		21.2	%
West South Central	445.0		11.9	%	448.4		12.8	%
Middle Atlantic	524.1		14.0	%	505.8		14.4	%
East North Central	361.8		9.7	%	355.3		10.1	%
Mountain	288.4		7.7	%	274.0		7.8	%
West North Central	214.7		5.8	%	219.6		6.3	%
East South Central	76.0		2.0	%	87.1		2.5	%
New England	84.2		2.3	%	74.8		2.1	%
Total Commercial mortgage loans	$	3,732.1	100.0	%	$	3,514.1	100.0	%

⁽¹⁾ Balances do not include collective valuation allowance for losses.

	June 30, 2015(1)				December 31, 2014(1)
	Gross Carrying Value		% of Total		Gross Carrying Value		% of Total
Commercial Mortgage Loans by Property Type:
Retail	$	1,341.4	35.9	%	$	1,236.4	35.2	%
Industrial	824.3		22.1	%	796.8		22.7	%
Apartments	609.8		16.3	%	550.6		15.7	%
Office	512.8		13.7	%	443.1		12.6	%
Hotel/Motel	158.9		4.3	%	149.7		4.2	%
Mixed Use	47.7		1.3	%	142.8		4.1	%
Other	237.2		6.4	%	194.7		5.5	%
Total Commercial mortgage loans	$	3,732.1	100.0	%	$	3,514.1	100.0	%

Mortgage Loans by Property Type of Collateral

	June 30, 2015(1)				December 31, 2014(1)
	Gross Carrying Value		% of Total		Gross Carrying Value		% of Total
Commercial Mortgage Loans by Property Type:
Retail	$	1,341.4	35.9	%	$	1,236.4	35.2	%
Industrial	824.3		22.1	%	796.8		22.7	%
Apartments	609.8		16.3	%	550.6		15.7	%
Office	512.8		13.7	%	443.1		12.6	%
Hotel/Motel	158.9		4.3	%	149.7		4.2	%
Mixed Use	47.7		1.3	%	142.8		4.1	%
Other	237.2		6.4	%	194.7		5.5	%
Total Commercial mortgage loans	$	3,732.1	100.0	%	$	3,514.1	100.0	%

⁽¹⁾ Balances do not include collective valuation allowance for 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:

	June 30, 2015(1)		December 31, 2014(1)
Year of Origination:
2015	$	365.6	$	—
2014	573.4		580.0
2013	752.5		758.8
2012	841.4		854.5
2011	640.2		674.4
2010	65.2		66.0
2009 and prior	493.8		580.4
Total Commercial mortgage loans	$	3,732.1	$	3,514.1

⁽¹⁾ Balances do not include collective valuation allowance for 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 (loss) by type for the periods indicated:

	Three Months Ended June 30,
	2015			2014
	Impairment		No. of Securities	Impairment			No. of Securities
U.S. corporate public securities	$	—	—	$	—		—
Foreign corporate public securities and foreign governments(1)	1.8		2	1.2			5
Foreign corporate private securities(1)	0.5		1	—			—
Residential mortgage-backed	0.1		16	0.2			12
Commercial mortgage-backed	—		—	—			—
Other asset-backed	—		—	—		*	1
Total	$	2.4	19	$	1.4		18
(1) Primarily U.S. dollar denominated.
*Less than $0.1
	Six Months Ended June 30,
	2015			2014
	Impairment		No. of Securities	Impairment			No. of Securities
U.S. corporate public securities	$	—	—	$	0.1		1
Foreign corporate public securities and foreign governments(1)	2.3		2	1.2			5
Foreign corporate private securities(1)	0.5		1	—			—
Residential mortgage-backed	1.5		23	0.9			15
Commercial mortgage-backed	—		—	0.1			2
Other asset-backed	—		—	—		*	1
Total	$	4.3	26	$	2.3		24
(1) Primarily U.S. dollar denominated.
*Less than $0.1

Net Investment Income

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

	Three Months Ended June 30,					Six Months Ended June 30,
	2015			2014		2015		2014
Fixed maturities	$	300.8		$	297.5	$	606.2	$	598.3
Equity securities, available-for-sale	(0.1		)	2.4		1.5		4.5
Mortgage loans on real estate	42.7			41.7		88.2		81.8
Policy loans	3.3			3.3		6.5		6.6
Short-term investments and cash equivalents	0.2			0.2		0.4		0.3
Other	7.0			7.6		15.3		17.5
Gross investment income	353.9			352.7		718.1		709.0
Less: Investment expenses	13.7			12.6		26.4		25.3
Net investment income	$	340.2		$	340.1	$	691.7	$	683.7

Realized Gain (Loss) on Investments

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

	Three Months Ended June 30,						Six Months Ended June 30,
	2015			2014			2015			2014
Fixed maturities, available-for-sale, including securities pledged	$	(7.6	)	$	(3.2	)	$	(10.4	)	$	0.3
Fixed maturities, at fair value option	(38.5		)	(10.9		)	(52.4		)	(23.5		)
Equity securities, available-for-sale	(0.3		)	0.3			(0.3		)	1.3
Derivatives	(73.5		)	4.6			(41.7		)	(12.9		)
Embedded derivative - fixed maturities	(2.5		)	(0.8		)	(2.7		)	(1.3		)
Embedded derivative - product guarantees	57.5			(14.2		)	12.0			(32.0		)
Other investments	(0.1		)	—			—			—
Net realized capital gains (losses)	$	(65.0	)	$	(24.2	)	$	(95.5	)	$	(68.1	)
After-tax net realized capital gains (losses)	$	(42.3	)	$	(15.7	)	$	(62.1	)	$	(44.2	)

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 June 30,				Six Months Ended June 30,
	2015		2014		2015		2014
Proceeds on sales	$	474.0	$	499.0	$	636.5	$	970.0
Gross gains	6.3		8.6		7.8		20.9
Gross losses	11.8		10.2		15.5		20.1

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 June 30,
	2015				2014
	Impairment			No. of Securities	Impairment		No. of Securities
U.S. corporate public securities	$	—		—	$	—	—
Foreign corporate public securities and foreign governments(1)	0.2			1	1.2		5
Foreign corporate private securities(1)	—			—	—		—
Residential mortgage-backed	—		*	1	0.1		2
Commercial mortgage-backed	—			—	—		—
Other asset-backed	—			—	—		—
Total	$	0.2		2	$	1.3	7
(1) Primarily U.S. dollar denominated.
*Less than $0.1
	Six Months Ended June 30,
	2015				2014
	Impairment			No. of Securities	Impairment		No. of Securities
U.S. corporate public securities	$	—		—	$	—	—
Foreign corporate public securities and foreign governments(1)	0.7			1	1.2		5
Foreign corporate private securities(1)	—			—	—		—
Residential mortgage-backed	0.5			3	0.1		2
Commercial mortgage-backed	—			—	0.1		2
Other asset-backed	—			—	—		—
Total	$	1.2		4	$	1.4	9
(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 periods indicated:

	Three Months Ended June 30,
	2015		2014
Balance at April 1	$	21.8	$	28.0
Additional credit impairments:
On securities not previously impaired	—		—
On securities previously impaired	—		0.1
Reductions:
Increase in cash flows	—		—
Securities sold, matured, prepaid or paid down	0.4		0.7
Balance at June 30	$	21.4	$	27.4
	Six Months Ended June 30,
	2015		2014
Balance at January 1	$	22.4	$	28.0
Additional credit impairments:
On securities not previously impaired	—		0.7
On securities previously impaired	0.8		0.2
Reductions:
Increase in cash flows	0.1		—
Securities sold, matured, prepaid or paid down	1.7		1.5
Balance at June 30	$	21.4	$	27.4

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%
June 30, 2015
Six months or less below amortized cost	$	5,009.8	$	85.8	$	166.0	$	21.5	841	9
More than six months and twelve months or less below amortized cost	344.3		15.5		28.4		3.8		75	2
More than twelve months below amortized cost	407.2		1.9		24.2		0.5		131	1
Total	$	5,761.3	$	103.2	$	218.6	$	25.8	1,047	12
December 31, 2014
Six months or less below amortized cost	$	1,690.4	$	59.7	$	50.5	$	13.2	341	13
More than six months and twelve months or less below amortized cost	115.1		—		6.7		—		34	—
More than twelve months below amortized cost	1,220.5		2.2		41.8		0.6		223	2
Total	$	3,026.0	$	61.9	$	99.0	$	13.8	598	15

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%
June 30, 2015
U.S. Treasuries	$	15.9	$	—		$	0.1		$	—		2	—
U.S. Government, agencies and authorities	—		—			—			—			—	—
State, municipalities and political subdivisions	227.4		—			8.5			—			70	—
U.S. corporate public securities	2,926.7		—		*	111.5			—		*	525	1
U.S. corporate private securities	625.1		24.5			28.6			5.6			54	2
Foreign corporate public securities and foreign governments	1,081.9		76.9			44.5			19.7			208	7
Foreign corporate private securities	379.6		—			11.9			—			39	—
Residential mortgage-backed	231.2		—		*	6.5			—		*	111	1
Commercial mortgage-backed	254.8		—			6.1			—			26	—
Other asset-backed	18.7		1.8			0.9			0.5			12	1
Total	$	5,761.3	$	103.2		$	218.6		$	25.8		1,047	12
December 31, 2014
U.S. Treasuries	$	12.4	$	—		$	—	*	$	—		1	—
U.S. Government, agencies and authorities	2.3		—			—		*	—			1	—
State, municipalities and political subdivisions	22.6		—			0.1			—			8	—
U.S. corporate public securities	1,270.1		9.6			38.1			2.1			224	4
U.S. corporate private securities	273.6		15.5			5.3			3.6			30	1
Foreign corporate public securities and foreign governments	903.6		26.2			44.5			5.8			165	5
Foreign corporate private securities	148.7		8.4			4.0			1.7			20	1
Residential mortgage-backed	288.6		—		*	5.8			—		*	124	2
Commercial mortgage-backed	59.2		—			0.1			—			11	—
Other asset-backed	44.9		2.2			1.1			0.6			14	2
Total	$	3,026.0	$	61.9		$	99.0		$	13.8		598	15
* Less than $0.1.