Investments (Tables)

6 Months Ended

Jun. 30, 2011

Investments

Amortized Cost and Fair Value of Available-for-Sale Fixed Maturities, Cost and Fair Value of Equity Securities

	June 30, 2011
(In millions)	Amortized Cost or Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		OTTI Unrealized Losses
Fixed maturities:
U.S. Treasury and government agencies	$	212.2	$	4.3	$	2.1	$	214.4	$	—
Municipal		944.2		34.1		9.2		969.1		—
Corporate		2,260.3		179.5		22.7		2,417.1		16.1
Residential mortgage-backed		669.5		39.3		9.2		699.6		6.7
Commercial mortgage-backed		339.9		14.7		0.5		354.1		—
Asset-backed		40.2		3.4		—		43.6		—
Total fixed maturities	$	4,466.3	$	275.3	$	43.7	$	4,697.9	$	22.8
Equity securities	$	147.8	$	17.0	$	0.6	$	164.2	$	—

	December 31, 2010
	Amortized Cost or Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		OTTI Unrealized Losses
Fixed maturities:
U.S. Treasury and government agencies	$	259.4	$	5.0	$	3.2	$	261.2	$	—
Municipal		952.7		21.3		19.3		954.7		—
Corporate		2,276.0		174.6		30.2		2,420.4		19.5
Residential mortgage-backed		704.2		41.8		11.9		734.1		8.3
Commercial mortgage-backed		349.3		18.3		1.0		366.6		—
Asset-backed		57.2		3.7		—		60.9		—
Total fixed maturities	$	4,598.8	$	264.7	$	65.6	$	4,797.9	$	27.8
Equity securities	$	120.7	$	9.8	$	1.9	$	128.6	$	—

Maturities of Available-for-Sale Debt Securities

(In millions)	June 30, 2011
	Amortized Cost		Fair Value
Due in one year or less	$	164.8	$	167.3
Due after one year through five years		1,100.8		1,182.8
Due after five years through ten years		1,458.8		1,544.3
Due after ten years		692.3		706.2
		3,416.7		3,600.6
Mortgage-backed and asset-backed securities		1,049.6		1,097.3
Total fixed maturities	$	4,466.3	$	4,697.9

Fixed Maturities and Equity Securities Unrealized Loss Position

	June 30, 2011
	12 months or less				Greater than 12 months				Total
(In millions)	Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value
Fixed maturities:
Investment grade:
U.S. Treasury and government agencies	$	1.8	$	70.0	$	0.3	$	15.7	$	2.1	$	85.7
Municipal		3.0		147.9		6.2		79.9		9.2		227.8
Corporate		3.5		167.5		8.3		58.6		11.8		226.1
Residential mortgage-backed		2.1		81.0		7.1		25.1		9.2		106.1
Commercial mortgage-backed		0.2		18.6		0.3		4.7		0.5		23.3
Total investment grade		10.6		485.0		22.2		184.0		32.8		669.0
Below investment grade:
Corporate		1.1		53.6		9.8		89.2		10.9		142.8
Total fixed maturities		11.7		538.6		32.0		273.2		43.7		811.8
Equity securities		0.6		14.9		—		—		0.6		14.9
Total	$	12.3	$	553.5	$	32.0	$	273.2	$	44.3	$	826.7

	December 31, 2010
	12 months or less				Greater than 12 months				Total
(In millions)	Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value
Fixed maturities:
Investment grade:
U.S. Treasury and government agencies	$	2.7	$	84.9	$	0.5	$	16.4	$	3.2	$	101.3
Municipal		10.3		289.1		9.0		86.7		19.3		375.8
Corporate		6.7		256.1		10.5		66.8		17.2		322.9
Residential mortgage-backed		3.1		89.1		8.8		31.0		11.9		120.1
Commercial mortgage-backed		0.1		13.1		0.9		7.3		1.0		20.4
Total investment grade		22.9		732.3		29.7		208.2		52.6		940.5
Below investment grade:
Corporate		1.0		51.1		12.0		90.0		13.0		141.1
Total fixed maturities		23.9		783.4		41.7		298.2		65.6		1,081.6
Equity securities		1.9		45.8		—		—		1.9		45.8
Total	$	25.8	$	829.2	$	41.7	$	298.2	$	67.5	$	1,127.4

Rollforward of Cumulative Amounts Related to Credit Loss Portion of OTTI Losses

(In millions)	Quarter Ended June 30						Six Months Ended June 30,
	2011			2010			2011			2010
Credit losses, beginning of period	$	16.3		$	21.4		$	16.7		$	20.0
Credit losses for which an OTTI was not previously recognized		—			0.1			—			0.3
Additional credit losses on securities for which an OTTI was previously recognized		—			0.6			0.2			2.2
Reductions for securities sold or matured during the period		(0.7	)		(2.6	)		(1.3	)		(3.0	)
Reduction for securities reclassified as intend to sell		(0.8	)		—			(0.8	)		—
Credit losses, end of period	$	14.8		$	19.5		$	14.8		$	19.5

Proceeds from Voluntary Sales

	Quarter Ended June 30,
	2011						2010
(In millions)	Proceeds from Sales		Gross Gains		Gross Losses		Proceeds from Sales		Gross Gains		Gross Losses
Fixed maturities	$	297.3	$	11.7	$	0.2	$	80.9	$	3.5	$	1.3
Equity securities		1.8		0.4		—		0.7		—		—

	Six Months Ended June 30,
	2011						2010
(In millions)	Proceeds from Sales		Gross Gains		Gross Losses		Proceeds from Sales		Gross Gains		Gross Losses
Fixed maturities	$	403.8	$	15.9	$	1.0	$	176.1	$	9.5	$	1.3
Equity securities		1.8		0.4		—		25.8		6.2		—