Fair Value (Tables)

6 Months Ended

Jun. 30, 2014

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

	June 30, 2014				December 31, 2013
	Carrying		Fair		Carrying		Fair
(in millions)	Value		Value		Value		Value
Financial Assets
Cash and cash equivalents	$	606.2	$	606.2	$	486.2	$	486.2
Fixed maturities		7,058.5		7,058.5		6,970.6		6,970.6
Equity securities		530.5		530.5		430.2		430.2
Other investments		218.4		220.9		173.1		173.7
Total financial assets	$	8,413.6	$	8,416.1	$	8,060.1	$	8,060.7
Financial Liabilities
Debt	$	903.9	$	1,030.7	$	903.9	$	961.7

Fair Value, Assets Measured on Recurring Basis

	June 30, 2014
(in millions)		Total		Level 1		Level 2		Level 3
Fixed maturities:
U.S. Treasury and government agencies	$	403.2	$	160.5	$	242.7	$	-
Foreign government		321.0		42.8		278.2		-
Municipal		1,133.5		-		1,106.7		26.8
Corporate		3,908.7		-		3,895.5		13.2
Residential mortgage-backed, U.S. agency backed		586.2		-		586.2		-
Residential mortgage-backed, non-agency		127.4		-		127.4		-
Commercial mortgage-backed		406.1		-		383.6		22.5
Asset-backed		172.4		-		172.4		-
Total fixed maturities		7,058.5		203.3		6,792.7		62.5
Equity securities		521.2		520.0		-		1.2
Other investments		138.5		-		134.9		3.6
Total investment assets at fair value	$	7,718.2	$	723.3	$	6,927.6	$	67.3

	December 31, 2013
(in millions)		Total		Level 1		Level 2		Level 3
Fixed maturities:
U.S. Treasury and government agencies	$	406.6	$	167.2	$	239.4	$	-
Foreign government		305.0		45.6		259.4		-
Municipal		1,126.3		-		1,100.7		25.6
Corporate		3,824.2		-		3,811.2		13.0
Residential mortgage-backed, U.S. agency backed		573.2		-		573.2		-
Residential mortgage-backed, non-agency		155.6		-		155.1		0.5
Commercial mortgage-backed		411.6		-		388.7		22.9
Asset-backed		168.1		-		168.1		-
Total fixed maturities		6,970.6		212.8		6,695.8		62.0
Equity securities		420.9		382.3		-		38.6
Other investments		153.2		-		149.6		3.6
Total investment assets at fair value	$	7,544.7	$	595.1	$	6,845.4	$	104.2

Estimated Fair Values of Financial Instruments Not Carried at Fair Value

		June 30, 2014
(in millions)		Total		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents	$	606.2	$	606.2	$	-	$	-
Equity securities		9.3		-		9.3		-
Other investments		82.4		-		58.6		23.8
Liabilities:
Debt	$	1,030.7	$	-	$	1,030.7	$	-
		December 31, 2013
(in millions)		Total		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents	$	486.2	$	486.2	$	-	$	-
Equity securities		9.3		-		9.3		-
Other investments		20.5		-		2.7		17.8
Liabilities:
Debt	$	961.7	$	-	$	961.7	$	-

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

		Fixed Maturities
(in millions)	Municipal		Corporate		Residential mortgage-backed, non-agency		Commercial mortgage-backed		Total		Equity and Other		Total Assets
Three Months Ended
June 30, 2014
Balance April 1, 2014	$	29.6	$	13.2	$	-	$	22.5	$	65.3	$	4.8	$	70.1
Transfers out of Level 3		(2.6)		-		-		-		(2.6)		-		(2.6)
Total gains:										-
Included in other comprehensive income - net appreciation on available-for-sale securities		0.3		-		-		0.4		0.7		-		0.7
Sales		(0.5)		-		-		(0.4)		(0.9)		-		(0.9)
Balance June 30, 2014	$	26.8	$	13.2	$	-	$	22.5	$	62.5	$	4.8	$	67.3
Three Months Ended
June 30, 2013
Balance April 1, 2013	$	28.8	$	22.8	$	0.6	$	24.8	$	77.0	$	28.6	$	105.6
Transfers out of Level 3		-		(2.2)		-		-		(2.2)		-		(2.2)
Total gains (losses):
Included in other comprehensive income - net (depreciation) appreciation on available-for-sale securities		(0.4)		(0.9)		-		(0.9)		(2.2)		3.7		1.5
Sales		(0.5)		(0.2)		-		(0.3)		(1.0)		-		(1.0)
Balance June 30, 2013	$	27.9	$	19.5	$	0.6	$	23.6	$	71.6	$	32.3	$	103.9

	Fixed Maturities
(in millions)	Municipal		Corporate		Residential mortgage-backed, non-agency		Commercial mortgage-backed		Asset-backed		Total		Equity and Other		Total Assets
Six Months Ended
June 30, 2014
Balance January 1,2014	$	25.6	$	13.0	$	0.5	$	22.9	$	-	$	62.0	$	42.2	$	104.2
Transfers into Level 3		2.2		-		-		-		-		2.2		-		2.2
Transfers out of Level 3		(2.6)		-		-		-		-		(2.6)		(37.4)		(40.0)
Total gains (losses):												-
Included in other comprehensive income-net appreciation on available-for-sale securities		0.6		0.2		-		0.7		-		1.5		-		1.5
Purchases and sales:												-
Purchases		2.5		-		-		-		-		2.5		-		2.5
Sales		(1.5)		-		(0.5)		(1.1)		-		(3.1)		-		(3.1)
Balance June 30, 2014	$	26.8	$	13.2	$	-	$	22.5	$	-	$	62.5	$	4.8	$	67.3
Six Months Ended
June 30, 2013
Balance January 1, 2013	$	19.4	$	26.4	$	0.7	$	26.7	$	1.5	$	74.7	$	28.0	$	102.7
Transfers into Level 3		9.7		0.2		-		-		-		9.9		-		9.9
Transfers out of Level 3		-		(2.2)		-		-		(1.5)		(3.7)		(0.9)		(4.6)
Total gains (losses):
Included in earnings		-		0.4		-		-		-		0.4		-		0.4
Included in other comprehensive income-net (depreciation) appreciation on available-for-sale securities		(0.3)		(1.0)		-		(1.4)		-		(2.7)		5.2		2.5
Sales		(0.9)		(4.3)		(0.1)		(1.7)		-		(7.0)		-		(7.0)
Balance June 30, 2013	$	27.9	$	19.5	$	0.6	$	23.6	$	-	$	71.6	$	32.3	$	103.9

Summary Gains and Losses due to Changes in Fair Value Recorded in Income for Level Three Assets

	Three Months Ended June 30				Six Months Ended June 30
	2014		2013		2014		2013
	Net Realized Investment				Net Realized Investment
(in millions)	Gains (Losses)				Gains (Losses)
Level 3 Assets:
Fixed maturities:
Corporate	$	-	$	-	$	-	$	0.4

Schedule of Additional Information About Significant Unobservable Inputs Used in Fair Valuations of Level 3

			June 30, 2014			December 31, 2013
	Valuation	Significant		Fair	Range		Fair	Range
(in millions)	Technique	Unobservable Inputs		Value	(Wtd Average)		Value	(Wtd Average)
Fixed maturities:
Municipal	Discounted	Discount for:	$	26.8		$	25.6
	cash flow	Small issue size			0.6-4.0%(2.1%)			1.0-4.0%(2.3%)
		Above-market coupon			0.3-1.0%(0.4%)			0.3-1.0%(0.5%)
Corporate	Discounted	Discount for:		12.9			12.8
	cash flow	Above-market coupon			0.3-0.8%(0.6%)			0.3-0.8%(0.6%)
		Small issue size			0.3-1.0%(0.5%)			0.3-1.0%(0.5%)
Residential mortgage-backed,	Discounted	Discount for:		-			0.5
non-agency	cash flow	Small issue size			N/A			0.5%(0.5%)
Commercial mortgage-backed	Discounted	Discount for:		22.5			22.9
	cash flow	Above-market coupon			0.5-0.8%(0.5%)			0.5-0.8%(0.6%)
		Credit stress			0.5% (0.5%)			0.5% (0.5%)
		Small issue size			0.5% (0.5%)			0.5% (0.5%)
		Lease structure			0.3% (0.3%)			0.3% (0.3%)
Equity securities	Market	Net tangible asset		1.1			38.5
	comparables	market multiples			1.0X (1.0X)			1.3X (1.3X)
Other	Discounted	Discount rate		3.6	18.0% (18.0%)		3.6	18.0% (18.0%)
	cash flow