Retirement Benefits (Tables)

12 Months Ended

Dec. 31, 2014

Retirement Benefits [Abstract]

Reconciliation Of Changes In Pension Plans' Projected Benefit Obligations, Fair Value Of Plan Assets And Funded Status

				Years ended
				December 31,
(In millions)				2014		2013		2012
Change in projected benefit obligation:
	Projected benefit obligation at beginning of the year			$	(408.4)	$	(418.5)	$	(371.6)
	Service cost				(8.4)		(10.2)		(9.7)
	Interest cost				(19.3)		(16.7)		(16.5)
	Actuarial (loss) gain				(87.1)		26.0		(29.7)
	Benefits paid				12.2		11.0		9.0
		Projected benefit obligation at end of the year			(511.0)		(408.4)		(418.5)
Change in fair value of plan assets:
	Fair value of plan assets at beginning of the year				440.4		386.0		349.7
	Actual return on plan assets				28.8		65.4		35.4
	Employer contributions				15.0		---		10.0
	Benefits paid and estimated expenses				(12.3)		(11.0)		(9.1)
		Fair value of plan assets at end of the year			471.9		440.4		386.0
			Funded status at end of the year	$	(39.1)	$	32.0	$	(32.5)

Projected And Accumulated Benefit Obligations And Fair Value Of Plan Assets For Pension Plans

	December 31,
(In millions)	2014		2013		2012
Projected benefit obligation	$	511.0	$	408.4	$	418.5
Accumulated benefit obligation		471.9		374.2		386.5
Fair value of plan assets		471.9		440.4		386.0

Amounts Recognized In Accumulated Other Comprehensive Loss

		Years ended
		December 31,
(In millions)		2014		2013		2012
Net loss		$	90.6	$	31.4	$	78.3
Prior service cost			1.9		2.3		2.7
	Total recognized in accumulated other comprehensive (income) loss	$	92.5	$	33.7	$	81.0

Components Of Net Periodic Benefit Cost, Other Changes In Plan Assets And Benefit Obligations Recognized In Other Comprehensive (Income) Loss And Assumptions Used In Measurements

						Years ended
						December 31,
(Dollars in millions)						2014			2013			2012
Components of net periodic benefit (credit) cost:
		Service cost				$	8.5		$	10.3		$	9.8
		Interest cost					19.3			16.7			16.5
		Expected return on plan assets					(33.4)			(29.3)			(26.5)
		Amortization of prior service cost					0.6			0.6			0.6
		Amortization of net actuarial loss					0.7			9.9			8.3
			Net periodic benefit (credit) cost				(4.3)			8.2			8.7
Other changes in plan assets and benefit obligation recognized
	in other comprehensive loss (income):
		Net loss (gain)					91.8			(62.2)			20.9
		Amortization of prior service cost					(0.7)			(0.6)			(0.6)
		Amortization of net actuarial loss					(0.7)			(9.9)			(8.3)
			Total recognized in other comprehensive loss (income)				90.4			(72.7)			12.0
				Total recognized in net periodic benefit (credit) cost and other
					comprehensive loss (income)	$	86.1		$	(64.5)		$	20.7
Weighted-average assumptions:
	Assumptions used for net periodic benefit (credit) cost:
		Discount rate					4.75	%		4.00	%		4.50	%
		Expected return on plan assets					7.71			7.70			7.69
		Rate of compensation increase					3.50			3.00			3.25
	Assumptions used to determine benefit obligations:
		Discount rate					4.00	%		4.75	%		4.00	%
		Rate of compensation increase					3.00			3.50			3.00

Expected Benefit Payments For Pension Plans

(In millions)	Amount
2015	$	13.5
2016		14.6
2017		15.8
2018		16.8
2019		18.0
2020-2024		111.1

Target And Actual Weighted-Average Asset Allocations For Pension Plans

		December 31,
		2014			2014			2013
		Target			Actual			Actual
Asset Category:
	Equity securities		50.0	%		50.3	%		49.0	%
	Debt securities		50.0			49.7			51.0
	Total		100.0	%		100.0	%		100.0	%

Estimated Fair Values Of Assets And Liabilities Measured And Recorded At Fair Value On A Recurring Basis

					December 31, 2014
(In millions)					Total		Level 1		Level 2		Level 3
Assets:
	Equity securities:
		Pooled separate account funds:
			Large cap growth		$	47.3	$	47.3	$	---	$	---
			Large cap blend			74.0		74.0		---		---
			Large cap value			24.2		24.2		---		---
			Mid cap blend			71.5		71.5		---		---
			Foreign			20.3		20.3		---		---
				Total pooled separate account funds		237.3		237.3		---		---
	Debt securities:
			Stable asset fund			234.6		---		234.6		---
				Total	$	471.9	$	237.3	$	234.6	$	---

					December 31, 2013
(In millions)					Total		Level 1		Level 2		Level 3
Assets:
	Equity securities:
		Pooled separate account funds:
			Large cap growth		$	43.0	$	43.0	$	---	$	---
			Large cap blend			64.7		64.7		---		---
			Large cap value			21.7		21.7		---		---
			Mid cap blend			64.8		64.8		---		---
			Foreign			21.7		21.7		---		---
				Total pooled separate account funds		215.9		215.9		---		---
	Debt securities:
			Stable asset fund			224.5		---		224.5		---
				Total	$	440.4	$	215.9	$	224.5	$	---

Reconciliation Of Changes In Postretirement Benefit Plans' Accumulated Benefit Obligations, Fair Value Of Plan Assets And Funded Status

				Years ended
				December 31,
(In millions)				2014		2013		2012
Change in accumulated postretirement benefit obligation:
	Accumulated postretirement benefit obligation at beginning of the year			$	(17.6)	$	(23.9)	$	(41.0)
	Service cost				---		---		(1.0)
	Interest cost				(0.8)		(1.1)		(1.8)
	Plan amendments				---		0.8		25.2
	Actuarial (loss) gain				(7.3)		5.2		(5.9)
	Benefits paid				1.0		1.4		0.6
		Accumulated postretirement benefit obligation at end of the year			(24.7)		(17.6)		(23.9)
Change in fair value of postretirement plan assets:
	Fair value of plan assets at beginning of the year				19.3		21.6		20.7
	Actual return on plan assets				2.0		(1.6)		1.2
	Employer contributions				0.9		0.7		0.3
	Benefits paid and estimated expenses				(1.0)		(1.4)		(0.6)
		Fair value of plan assets at end of the year			21.2		19.3		21.6
			Funded status at end of the year	$	(3.5)	$	1.7	$	(2.3)

Amounts Recognized In Accumulated Other Comprehensive (Income) Loss

		Years ended
		December 31,
(In millions)		2014		2013		2012
Net loss (gain)		$	2.9	$	(1.0)	$	5.1
Prior service credit			---		---		(17.1)
	Total recognized in accumulated other comprehensive loss (income)	$	2.9	$	(1.0)	$	(12.0)

Assumed Health Care Cost Trend Rates For Next Year

	Years ended
	December 31,
	2014			2013
Medical		6.90	%		7.10	%
Prescriptions		7.20			7.50
HMO (Blended)		5.70			6.00
Rate to which the cost trend is assumed to decline (the ultimate trend rate)*		4.50			4.50

*Year that the rate reaches the ultimate trend is 2027.

One-Percentage-Point Change In Assumed Health Care Cost Trend Rates

	1% Point		1% Point
(In millions)	Increase		Decrease
Effect on total of service and interest cost	$	0.1	$	(0.1)
Effect on postretirement benefit obligation		2.8		(2.3)

Components Of Net Periodic Benefit Cost, Other Changes In Plan Assets And Benefit Obligations Recognized In Other Comprehensive Loss And Assumptions Used In Measurement Of Postretirement Benefits

						Years ended
						December 31,
(Dollars in millions)						2014			2013			2012
Components of net periodic benefit (credit) cost:
		Service cost				$	---		$	---		$	1.0
		Interest cost					0.8			1.0			1.8
		Expected return on plan assets					(0.8)			(0.8)			(0.8)
		Amortization of prior service cost					---			(26.3)			(0.4)
		Amortization of net actuarial loss					---			5.7			---
			Net periodic benefit (credit) cost				---			(20.4)			1.6
Other changes in plan assets and benefit obligation recognized
	in other comprehensive (income) loss:
		Net (gain) loss					(5.9)			(3.3)			5.5
		Prior service credit					---			---			(25.2)
		Amortization of prior service credit					---			26.3			0.4
		Amortization of net actuarial loss					---			(5.8)			---
			Total recognized in other comprehensive (income) loss				(5.9)			17.2			(19.3)
				Total recognized in net periodic benefit (credit) cost and other
					comprehensive (income) loss	$	(5.9)		$	(3.2)		$	(17.7)
Weighted-average assumptions:
	Assumptions used for net periodic benefit (credit) cost:
		Discount rate					4.80	%		4.00	%		4.50	%
		Expected return on plan assets					4.20			4.20			4.20
	Assumptions used to determine benefit obligations:
		Discount rate					4.10	%		4.80	%		4.00	%

Expected Benefit Payments For Postretirement Benefit Plan

(In millions)	Amount
2015	$	1.5
2016		1.5
2017		1.4
2018		1.4
2019		1.3
2020-2024		6.4

Target And Actual Weighted-Average Asset Allocations For Postretirement Medical Plan

			Years ended
			December 31,
			2014			2014			2013
			Target			Actual			Actual
Asset category:
	Debt securities			95.0	%		96.7	%		96.2	%
	Cash and cash equivalents			5.0			3.3			3.8
		Total		100.0	%		100.0	%		100.0	%

Estimated Fair Values Of Assets And Liabilities Measured And Recorded At Fair Value On A Recurring Basis

				December 31, 2014
(In millions)				Total		Level 1		Level 2		Level 3
Assets:
	Debt securities:
		Municipal bonds		$	17.9	$	---	$	17.9	$	---
		Corporate bonds			2.6		---		2.6		---
	Cash and cash equivalents				0.7		0.7		---		---
			Total	$	21.2	$	0.7	$	20.5	$	---

				December 31, 2013
(In millions)					Total		Level 1	Level 2		Level 3
Assets:
	Debt securities:
		Municipal bonds		$	16.8	$	---	$	16.8	$	---
		Corporate bond			1.8		---		1.8		---
	Cash and cash equivalents				0.7		0.7		---		---
			Total	$	19.3	$	0.7	$	18.6	$	---