Investments (Tables)

12 Months Ended

Dec. 31, 2014

Investments [Abstract]

Amortized Costs And Fair Values Of Fixed Maturity Securities Available-For-Sale

		December 31,
		2014
		Amortized		Unrealized		Unrealized		Fair
(In millions)		Cost		Gains		Losses		Value
Corporate bonds		$	6,943.8	$	367.9	$	(39.1)	$	7,272.6
U.S. government and agency bonds			262.0		38.3		(0.2)		300.1
U.S. state and political subdivision bonds			125.8		10.4		(0.1)		136.1
Foreign government bonds			58.4		6.5		---		64.9
	Total fixed maturity securities	$	7,390.0	$	423.1	$	(39.4)	$	7,773.7

		December 31,
		2013
		Amortized		Unrealized		Unrealized		Fair
(In millions)		Cost		Gains		Losses		Value
Corporate bonds		$	6,282.1	$	339.6	$	(76.0)	$	6,545.7
U.S. government and agency bonds			320.8		32.8		(0.4)		353.2
U.S. state and political subdivision bonds			134.3		6.8		(0.8)		140.3
Foreign government bonds			58.9		6.6		---		65.5
S&P 500 Index options			15.8		---		---		15.8
	Total fixed maturity securities	$	6,811.9	$	385.8	$	(77.2)	$	7,120.5

Schedule Of Contractual Maturities Of Fixed Maturity Securities Available-For-Sale

		December 31, 2014				December 31, 2013
		Amortized		Fair		Amortized		Fair
(In millions)		Cost		Value		Cost		Value
Due in one year or less		$	649.0	$	658.0	$	486.2	$	495.1
Due after one year through five years			3,060.8		3,215.4		2,974.5		3,168.9
Due after five years through ten years			2,847.9		2,916.7		2,497.5		2,524.6
Due after ten years			832.3		983.6		853.7		931.9
	Total fixed maturity securities	$	7,390.0	$	7,773.7	$	6,811.9	$	7,120.5

Schedule Of Gross Unrealized Losses And Fair Value Of Investments

				December 31, 2014
				Total				Less than 12 months				12 or more months
(Dollars in millions)				Number		Amount		Number		Amount		Number		Amount
Unrealized losses:
		Corporate bonds			995	$	39.1		683	$	21.3		312	$	17.8
		U.S. government and agency bonds			5		0.2		---		---		5		0.2
		U.S. state and political subdivision bonds			4		0.1		---		---		4		0.1
			Total		1,004	$	39.4		683	$	21.3		321	$	18.1
Fair market value of securities with
	unrealized losses:
		Corporate bonds			995	$	1,763.2		683	$	1,162.2		312	$	601.0
		U.S. government and agency bonds			5		6.4		---		---		5		6.4
		U.S. state and political subdivision bonds			4		6.9		---		---		4		6.9
			Total		1,004	$	1,776.5		683	$	1,162.2		321	$	614.3

				December 31, 2013
				Total				Less than 12 months				12 or more months
(Dollars in millions)				Number		Amount		Number		Amount		Number		Amount
Unrealized losses:
		Corporate bonds			908	$	76.0		848	$	66.3		60	$	9.7
		U.S. government and agency bonds			9		0.4		9		0.4		---		---
		U.S. state and political subdivision bonds			10		0.8		10		0.8		---		---
			Total		927	$	77.2		867	$	67.5		60	$	9.7
Fair market value of securities with
	unrealized losses:
		Corporate bonds			908	$	1,663.8		848	$	1,557.7		60	$	106.1
		U.S. government and agency bonds			9		16.9		9		16.9		---		---
		U.S. state and political subdivision bonds			10		15.4		10		15.4		---		---
			Total		927	$	1,696.1		867	$	1,590.0		60	$	106.1

Commercial Mortgage Loan Portfolio By Property Type, By Geographic Region Within The U.S. And By U.S. State

			December 31, 2014				December 31, 2013
(Dollars in millions)			Amount		Percent		Amount		Percent
Property type:
	Retail		$	2,627.1	49.4	%	$	2,629.2	48.6	%
	Office			1,013.4	19.1			982.4	18.2
	Industrial			1,001.5	18.8			1,008.7	18.7
	Commercial			213.6	4.0			218.6	4.0
	Hotel/motel			165.7	3.1			276.3	5.1
	Apartment and other			299.8	5.6			289.9	5.4
		Total commercial mortgage loans, net	$	5,321.1	100.0	%	$	5,405.1	100.0	%
Geographic region*:
	Pacific		$	1,914.6	36.0	%	$	1,910.1	35.3	%
	South Atlantic			1,065.5	20.0			1,090.0	20.2
	West South Central			676.9	12.7			672.8	12.4
	Mountain			606.5	11.4			611.4	11.3
	East North Central			466.0	8.8			473.8	8.8
	Middle Atlantic			215.3	4.0			223.0	4.1
	East South Central			188.7	3.6			166.6	3.1
	West North Central			140.1	2.6			186.9	3.5
	New England			47.5	0.9			70.5	1.3
		Total commercial mortgage loans, net	$	5,321.1	100.0	%	$	5,405.1	100.0	%
U.S. state:
	California		$	1,434.2	27.0	%	$	1,455.5	26.9	%
	Texas			623.4	11.7			618.8	11.5
	Florida			309.4	5.8			331.6	6.1
	Georgia			306.6	5.8			310.7	5.8
	Other states			2,647.5	49.7			2,688.5	49.7
		Total commercial mortgage loans, net	$	5,321.1	100.0	%	$	5,405.1	100.0	%

* Geographic regions obtained from the American Council of Life Insurers Mortgage Loan Portfolio Profile.

Changes In Commercial Mortgage Loan Loss Allowance

			Years ended
			December 31,
(In millions)			2014		2013
Commercial mortgage loan loss allowance:
Beginning balance			$	43.6	$	46.6
	Provision			7.1		15.9
	Charge-offs, net			(10.7)		(18.9)
		Ending balance	$	40.0	$	43.6
Specific loan loss allowance			$	23.8	$	25.9
General loan loss allowance				16.2		17.7
		Total commercial mortgage loan loss allowance	$	40.0	$	43.6

Schedule Of Recorded Investment In Commercial Mortgage Loans

		December 31,
(In millions)		2014		2013
Commercial mortgage loans collectively evaluated for impairment		$	5,255.2	$	5,334.4
Commercial mortgage loans individually evaluated for impairment			105.9		114.3
Commercial mortgage loan loss allowance			(40.0)		(43.6)
	Total commercial mortgage loans, net	$	5,321.1	$	5,405.1

Performing And Nonperforming Commercial Mortgage Loans By Property Type

			December 31, 2014
									Hotel/				Apartment
(In millions)			Retail		Industrial		Office		Motel		Commercial		and Other		Total
Performing commercial mortgage
	loans		$	2,622.4	$	1,001.4	$	1,012.7	$	165.7	$	213.6	$	299.1	$	5,314.9
Nonperforming commercial
	mortgage loans			4.7		0.1		0.7		---		---		0.7		6.2
		Total commercial mortgage loans	$	2,627.1	$	1,001.5	$	1,013.4	$	165.7	$	213.6	$	299.8	$	5,321.1

			December 31, 2013
									Hotel/				Apartment
(In millions)			Retail		Industrial		Office		Motel		Commercial		and Other		Total
Performing commercial mortgage
	loans		$	2,624.2	$	1,004.6	$	979.6	$	276.3	$	218.6	$	289.9	$	5,393.2
Nonperforming commercial
	mortgage loans			5.0		4.1		2.8		---		---		---		11.9
		Total commercial mortgage loans	$	2,629.2	$	1,008.7	$	982.4	$	276.3	$	218.6	$	289.9	$	5,405.1

Impaired Commercial Mortgage Loans Identified In Management's Specific Review Of Probable Loan Losses And The Related Allowance

						December 31, 2014
								Unpaid				Amount on
						Recorded		Principal		Related		Nonaccrual
(In millions)						Investment		Balance		Allowance		Status
Impaired commercial mortgage loans:
	Without specific loan loss allowances:
		Retail				$	25.0	$	25.0	$	---	$	10.5
		Office					1.6		1.6		---		---
		Commercial					2.3		2.3		---		0.5
		Apartment and other					2.8		2.8		---		---
			Total impaired commercial mortgage loans without specific
				loan loss allowances			31.7		31.7		---		11.0
	With specific loan loss allowances:
		Retail					52.2		52.2		12.3		7.7
		Office					8.6		8.6		2.9		---
		Industrial					4.6		4.6		1.6		0.1
		Commercial					8.5		8.5		7.0		0.6
		Apartment and other					0.3		0.3		---		---
			Total impaired commercial mortgage loans with specific
				loan loss allowances			74.2		74.2		23.8		8.4
					Total impaired commercial mortgage loans	$	105.9	$	105.9	$	23.8	$	19.4

						December 31, 2013
								Unpaid				Amount on
						Recorded		Principal		Related		Nonaccrual
(In millions)						Investment		Balance		Allowance		Status
Impaired commercial mortgage loans:
	Without specific loan loss allowances:
		Retail				$	16.1	$	16.1	$	---	$	7.6
		Office					3.9		3.9		---		1.5
		Industrial					1.0		1.0		---		---
		Commercial					1.8		1.8		---		---
		Apartment and other					3.8		3.8		---		---
			Total impaired commercial mortgage loans without specific
				loan loss allowances			26.6		26.6		---		9.1
	With specific loan loss allowances:
		Retail					58.5		58.5		16.1		21.6
		Office					9.7		9.7		3.8		0.9
		Industrial					12.6		12.6		2.4		1.4
		Commercial					6.0		6.0		3.6		2.5
		Apartment and other					0.9		0.9		---		---
			Total impaired commercial mortgage loans with specific
				loan loss allowances			87.7		87.7		25.9		26.4
					Total impaired commercial mortgage loans	$	114.3	$	114.3	$	25.9	$	35.5

Information Related To Troubled Debt Restructurings Of Financing Receivables

			Year ended
			December 31, 2014
					Pre-		Post-
					Restructuring		Restructuring
			Number of		Recorded		Recorded
(Dollars in millions)			Loans		Investment		Investment
Troubled debt restructurings:
	Retail			45	$	42.7	$	40.9
	Office			3		1.4		1.2
	Industrial			4		3.1		3.4
	Commercial			2		3.0		3.2
		Total troubled debt restructurings		54	$	50.2	$	48.7

			Year ended
			December 31, 2013
					Pre-		Post-
					Restructuring		Restructuring
			Number of		Recorded		Recorded
(Dollars in millions)			Loans		Investment		Investment
Troubled debt restructurings:
	Retail			16	$	20.0	$	20.8
	Office			3		1.6		1.6
	Industrial			2		2.2		2.3
	Commercial			1		0.9		0.9
		Total troubled debt restructurings		22	$	24.7	$	25.6

Average Recorded Investment In Impaired Commercial Mortgage Loans Before Specific Allowances For Losses

	Years ended December 31,
(In millions)	2014		2013		2012
Average recorded investment	$	105.6	$	113.4	$	101.3

Aging Of Commercial Mortgage Loans By Property Type

			December 31, 2014
															Total
							Greater Than				Allowance				Commercial
			30 Days		60 Days		90 Days		Total		Related		Current,		Mortgage
(In millions)			Past Due		Past Due		Past Due		Past Due		to Past Due		Net		Loans
Commercial mortgage loans:
	Retail		$	0.2	$	2.0	$	4.8	$	7.0	$	(2.1)	$	2,622.2	$	2,627.1
	Office			1.9		---		0.8		2.7		---		1,010.7		1,013.4
	Industrial			0.5		---		0.3		0.8		(0.2)		1,000.9		1,001.5
	Hotel/motel			---		---		---		---		---		165.7		165.7
	Commercial			---		---		---		---		---		213.6		213.6
	Apartment and other			0.2		0.7		---		0.9		---		298.9		299.8
		Total commercial mortgage loans	$	2.8	$	2.7	$	5.9	$	11.4	$	(2.3)	$	5,312.0	$	5,321.1

			December 31, 2013
															Total
							Greater Than				Allowance				Commercial
			30 Days		60 Days		90 Days		Total		Related		Current,		Mortgage
(In millions)			Past Due		Past Due		Past Due		Past Due		to Past Due		Net		Loans
Commercial mortgage loans:
	Retail		$	2.8	$	0.3	$	6.1	$	9.2	$	(1.5)	$	2,621.5	$	2,629.2
	Office			1.3		---		3.7		5.0		(0.9)		978.3		982.4
	Industrial			---		3.3		1.8		5.1		(0.9)		1,004.5		1,008.7
	Hotel/motel			6.3		---		---		6.3		---		270.0		276.3
	Commercial			---		---		---		---		---		218.6		218.6
	Apartment and other			---		---		---		---		---		289.9		289.9
		Total commercial mortgage loans	$	10.4	$	3.6	$	11.6	$	25.6	$	(3.3)	$	5,382.8	$	5,405.1

Net Investment Income Summarized By Investment Type

			Years ended
			December 31,
(In millions)				2014		2013	2012
Fixed maturity securities			$	296.4	$	303.0	$	316.8
Commercial mortgage loans				332.1		341.7		331.9
Real estate				1.1		(1.4)		(1.0)
S&P 500 Index options				8.6		14.4		7.8
Other				4.5		9.0		8.6
	Gross investment income			642.7		666.7		664.1
Investment expenses				(22.4)		(22.9)		(22.3)
Tax-advantaged investment operating losses				(19.4)		(13.9)		(13.3)
		Net investment income	$	600.9	$	629.9	$	628.5

Schedule Of Gross Capital Gains And Losses By Investment Type

				Years ended
				December 31,
(In millions)				2014		2013		2012
Gains:
	Fixed maturity securities			$	5.9	$	9.8	$	10.8
	Commercial mortgage loans				2.4		2.4		1.5
	Real estate				2.0		3.0		1.3
	Other				---		0.2		0.6
		Gross capital gains			10.3		15.4		14.2
Losses:
	Fixed maturity securities				(2.8)		(2.3)		(5.0)
	Provision for commercial mortgage loan losses				(7.1)		(15.9)		(13.4)
	Real estate				(6.4)		(9.6)		(3.5)
	Other				(8.0)		(3.3)		(1.0)
		Gross capital losses			(24.3)		(31.1)		(22.9)
			Net capital losses	$	(14.0)	$	(15.7)	$	(8.7)