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Retirement Plans and Other Post-Retirement Benefits (Tables)

12 Months Ended

Dec. 31, 2012

Retirement Plans and Other Post-Retirement Benefits [Abstract]

Retirement plan is partially funded and claims are paid as reported

		Pension Benefits								Other Benefits
In millions		2012				2011				2012				2011
Change in Benefit Obligation
Balance at beginning of year		$	470.2			$	434.3			$	56.8			$	58.5
Service cost			11.3				10.3				2.8				2.9
Interest cost			23.0				24.2				2.4				2.8
Plan amendments			5.5				2.0				–				–
Participant contributions			–				–				1.4				1.7
Actuarial (gain)/loss			46.7				33.8				4.2				(4.4	)
Benefits paid			(28.3	)			(34.4	)			(4.6	)			(4.7	)
Balance at end of year		$	528.4			$	470.2			$	63.0			$	56.8
Change in Plan Assets
Fair value of plan assets at beginning of year		$	498.2			$	526.4			$	5.3			$	6.2
Actual (loss) return on plan assets			68.1				(2.6	)			0.6				–
Total contributions			1.8				8.8				4.6				3.8
Benefits paid			(28.3	)			(34.4	)			(4.6	)			(4.7	)
Intra plan transfers			5.9				–				(5.9	)			–
Fair value of plan assets at end of year			545.7				498.2				–				5.3
Funded status at end of year		$	17.3			$	28.0			$	(63.0	)		$	(51.5	)

Summary of amounts recognized in consolidated balance sheets

		Pension Benefits								Other Benefits
In millions		2012				2011				2012				2011
Other long-term assets		$	53.7			$	59.8			$	–			$	–
Current liabilities			(2.0	)			(1.8	)			(4.2	)			(3.4	)
Other long-term liabilities			(34.4	)			(30.0	)			(58.8	)			(48.1	)
Net amount recognized		$	17.3			$	28.0			$	(63.0	)		$	(51.5	)

Components of amounts recognized as Accumulated other comprehensive income on pre-tax basis

		Pension Benefits								Other Benefits
In millions		2012				2011				2012				2011
Prior service cost/(credit)		$	17.9			$	14.9			$	(1.9	)		($	2.8	)
Net actuarial loss			237.6				234.0				12.6				9.2

The weighted-average assumptions used in computing the benefit obligations

		Pension Benefits								Other Benefits
		2012				2011				2012				2011
Discount rate – benefit obligation			4.28	%			5.09	%			3.58	%			4.45	%
Future compensation growth rate			4.00				4.00				–				–

Information for pension plans with an accumulated benefit obligation in excess of plan assets

In millions			2012				2011
Projected benefit obligation		$	36.4			$	31.8
Accumulated benefit obligation			32.0				27.9
Fair value of plan assets			–				–

Schedule of pension and post retirement medical benefit plans

		Year Ended December 31
In millions			2012				2011				2010
Pension Benefits
Service cost		$	11.3			$	10.3			$	9.5
Interest cost			23.0				24.2				23.9
Expected return on plan assets			(42.2	)			(42.0	)			(40.3	)
Amortization of prior service cost			2.5				2.6				2.5
Amortization of actuarial loss			17.0				13.3				13.6
One-time settlement charge			–				2.0				–
Total net periodic benefit cost		$	11.6			$	10.4			$	9.2
Other Benefits
Service cost		$	2.8			$	2.9			$	2.9
Interest cost			2.4				2.8				3.4
Expected return on plan assets			(0.5	)			(0.5	)			(0.5	)
Amortization of prior service cost/(credit)			(0.9	)			(1.2	)			(1.2	)
Amortization of actuarial loss			0.7				0.9				1.5
Total net periodic benefit cost		$	4.5			$	4.9			$	6.1

Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss)

		Year Ended December 31
In millions		2012				2011
Pension Benefits
Actuarial loss		$	20.6			$	76.5
Prior service cost			5.5				2.1
Amortization of prior service cost			(2.5	)			(2.6	)
Amortization of actuarial losses			(17.0	)			(13.3	)
Total recognized in other comprehensive loss			6.6				62.7
Total recognized in net periodic benefit cost and other comprehensive loss		$	18.2			$	73.1
Other Benefits
Actuarial (gain) loss		$	4.0			$	(3.8	)
Amortization of prior service cost			0.9				1.2
Amortization of actuarial losses			(0.7	)			(0.9	)
Total recognized in other comprehensive (income) loss			4.2				(3.5	)
Total recognized in net periodic benefit cost and other comprehensive loss		$	8.7			$	1.4

Schedule of defined benefit plan weighted average assumptions used in calculating net periodic benefit cost

		Year Ended December 31
		2012				2011				2010
Pension Benefits
Discount rate – benefit expense			5.09	%			5.81	%			6.10	%
Future compensation growth rate			4.00				4.00				4.00
Expected long-term rate of return on plan assets			8.50				8.50				8.50
Other Benefits
Discount rate – benefit expense			4.45	%			5.12	%			5.90	%
Expected long-term rate of return on plan assets			8.50				8.50				8.50

Schedule of health care cost trend rates used in calculating benefit obligations

		2012				2011
Health care cost trend rate assumed for next year			7.68	%			7.90	%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)			4.50				4.50
Year that the rate reaches the ultimate rate			2028				2028

Schedule of effect of one-percentage-point change in assumed health care cost trend rates

		One Percentage Point
In millions		Increase				Decrease
Effect on:
Post-retirement benefit obligation		$	4.9			$	4.4
Total of service and interest cost components			0.6				0.5

Schedule of target allocation for the plan assets

Domestic Equity –
Large cap			39	%
Small and mid cap			13
International equity			13
Real Estate Investment Trusts (REIT)			5
Fixed income, cash and cash equivalents			30

Schedule of fair value of benefit plan assets

		Fair Value Measurements at December 31, 2012
In millions			Total				Level 1				Level 2				Level 3
Domestic Equity
Large cap		$	169.6			$	169.6			$	–			$	–
Small and mid cap			65.7				65.7				–				–
Other			1.1				0.8				0.3				–
International equity			100.3				61.9				38.4				–
REIT			25.4				25.4				–				–
Fixed income			164.9				27.2				137.7				–
Cash and equivalents			18.7				–				18.7				–
Total		$	545.7			$	350.6			$	195.1			$	–
		Fair Value Measurements at December 31, 2011
In millions			Total				Level 1				Level 2				Level 3
Domestic Equity
Large cap		$	164.5			$	164.5			$	–			$	–
Small and mid cap			57.7				57.7				–				–
Other			0.6				0.5				0.1				–
International equity			79.7				48.3				31.4				–
REIT			26.4				26.4				–				–
Fixed income			157.3				83.4				73.9				–
Cash and equivalents			17.3				–				17.3				–
Total		$	503.5			$	380.8			$	122.7			$	–

Benefit payments expected under non-qualified pension plans and other benefit plans

In thousands
Nonqualified pension plans		$	2,014
Other benefit plans			4,238

Summary of benefit expected to be paid out

In thousands			Pension Benefits				Other Benefits
2013		$	32,465			$	4,238
2014			32,135				4,557
2015			32,179				4,574
2016			31,977				4,823
2017			31,986				5,104
2018 through 2022			156,439				26,328

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