Fair Value (Tables)

6 Months Ended

Jun. 30, 2011

Fair Value

Fair Value of Financial Instruments

(In millions)	June 30, 2011				December 31, 2010
	Carrying Value		Fair Value		Carrying Value		Fair Value
Financial Assets
Cash and cash equivalents	$	721.6	$	721.6	$	290.4	$	290.4
Fixed maturities		4,697.9		4,697.9		4,797.9		4,797.9
Equity securities		164.2		164.2		128.6		128.6
Mortgage loans		5.1		5.4		5.5		5.8
Total financial assets	$	5,588.8	$	5,589.1	$	5,222.4	$	5,222.7
Financial Liabilities
Derivative instruments	$	4.7	$	4.7	$	—	$	—
Legal indemnities		5.6		5.6		5.4		5.4
Debt		857.9		872.7		605.9		603.9
Total financial liabilities	$	868.2	$	883.0	$	611.3	$	609.3

Fair Value of Assets on a Recurring Basis

	June 30, 2011
(In millions)	Total		Level 1		Level 2		Level 3
Fixed maturities:
U.S. Treasury and government agencies	$	214.4	$	94.6	$	119.8	$	—
Municipal		969.1		—		953.0		16.1
Corporate		2,417.1		—		2,380.3		36.8
Residential mortgage-backed, U.S. agency backed		598.6		—		598.6		—
Residential mortgage-backed, non-agency		101.0		—		100.5		0.5
Commercial mortgage-backed		354.1		—		349.0		5.1
Asset-backed		43.6		—		30.1		13.5
Total fixed maturities		4,697.9		94.6		4,531.3		72.0
Equity securities		155.5		127.7		24.9		2.9
Total investment assets at fair value	$	4,853.4	$	222.3	$	4,556.2	$	74.9
Liabilities:
Derivative instruments	$	4.7	$	—	$	4.7	$	—

	December 31, 2010
	Total		Level 1		Level 2		Level 3
Fixed maturities:
U.S. Treasury and government agencies	$	261.2	$	124.0	$	137.2	$	—
Municipal		954.7		—		938.1		16.6
Corporate		2,420.4		—		2,392.2		28.2
Residential mortgage-backed, U.S. agency backed		600.4		—		600.4		—
Residential mortgage-backed, non-agency		133.7		—		132.9		0.8
Commercial mortgage-backed		366.6		—		361.1		5.5
Asset-backed		60.9		—		47.4		13.5
Total fixed maturities		4,797.9		124.0		4,609.3		64.6
Equity securities		120.0		106.6		10.5		2.9
Total investment assets at fair value	$	4,917.9	$	230.6	$	4,619.8	$	67.5

Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)

	Fixed Maturities																		Equities			Total Assets
(In millions)	Municipal			Corporate			Residential mortgage- backed, non- agency			Commercial mortgage- backed			Asset- backed			Total
Quarter Ended June 30, 2011
Balance April 1, 2011	$	15.9		$	34.3		$	0.6		$	5.3		$	13.4		$	69.5		$	2.9		$	72.4
Transfers out of Level 3		—			(6.5	)		—			—			—			(6.5	)		—			(6.5	)
Total gains:
Included in other comprehensive income		0.5			0.2			—			—			0.3			1.0			—			1.0
Purchases and sales:
Purchases		—			8.9			—			—			—			8.9			—			8.9
Sales		(0.3	)		(0.1	)		(0.1	)		(0.2	)		(0.2	)		(0.9	)		—			(0.9	)
Balance June 30, 2011	$	16.1		$	36.8		$	0.5		$	5.1		$	13.5		$	72.0		$	2.9		$	74.9
Quarter Ended June 30, 2010
Balance April 1, 2010	$	15.2		$	35.8		$	1.4		$	5.9		$	17.6		$	75.9		$	2.8		$	78.7
Transfers out of Level 3		—			—			—			—			(2.0	)		(2.0	)		—			(2.0	)
Total gains:
Included in other comprehensive income		0.1			0.7			—			0.1			0.4			1.3			—			1.3
Purchases and sales:
Purchases		—			—			—			—			—			—			—			—
Sales		(0.4	)		(5.3	)		(0.3	)		(0.1	)		(0.3	)		(6.4	)		—			(6.4	)
Balance June 30, 2010	$	14.9		$	31.2		$	1.1		$	5.9		$	15.7		$	68.8		$	2.8		$	71.6
Six Months Ended June 30, 2011
Balance January 1, 2011	$	16.6		$	28.2		$	0.8		$	5.5		$	13.5		$	64.6		$	2.9		$	67.5
Transfers into Level 3		—			3.7			—			—			—			3.7			—			3.7
Transfers out of Level 3		—			(6.5	)		—			—			—			(6.5	)		—			(6.5	)
Total gains (losses):
Included in earnings		—			—			—			—			—			—			(0.5	)		(0.5	)
Included in other comprehensive income		0.1			0.3			—			—			0.3			0.7			0.5			1.2
Purchases and sales:
Purchases		—			11.8			—			—			—			11.8			—			11.8
Sales		(0.6	)		(0.7	)		(0.3	)		(0.4	)		(0.3	)		(2.3	)		—			(2.3	)
Balance June 30, 2011	$	16.1		$	36.8		$	0.5		$	5.1		$	13.5		$	72.0		$	2.9		$	74.9
Six Months Ended June 30, 2010
Balance January 1, 2010	$	15.5		$	28.9		$	—		$	6.2		$	9.2		$	59.8		$	2.8		$	62.6
Transfers into Level 3		—			6.6			—			—			6.9			13.5			—			13.5
Transfer out of Level 3		—			—			—			—			(2.0	)		(2.0	)		—			(2.0	)
Total gains (losses):
Included in earnings		—			0.1			—			—			—			0.1			(0.3	)		(0.2	)
Included in other comprehensive income		0.2			1.0			—			—			0.2			1.4			0.3			1.7
Purchases and sales:
Purchases		—			0.3			1.4			—			2.0			3.7			—			3.7
Sales		(0.8	)		(5.7	)		(0.3	)		(0.3	)		(0.6	)		(7.7	)		—			(7.7	)
Balance June 30, 2010	$	14.9		$	31.2		$	1.1		$	5.9		$	15.7		$	68.8		$	2.8		$	71.6

Schedule of Gain (Loss) Due to Change in Fair Value Level 3 Assets

	2011			2010
(In millions)	Other-than- temporary impairments			Other-than- temporary impairments			Net realized investment gains		Total
Level 3 Assets:
Fixed maturities:
Corporate	$	—		$	—		$	0.1	$	0.1
Equity securities		(0.5	)		(0.3	)		—		(0.3	)
Total assets	$	(0.5	)	$	(0.3	)	$	0.1	$	(0.2	)