Components of Net Periodic Benefit Cost

6 Months Ended

Jun. 30, 2013

General Discussion of Pension and Other Postretirement Benefits [Abstract]

Components of Net Periodic Benefit Cost

Components of Net Periodic Benefit Cost

Benefit costs for defined benefit pension plans are shown below.  The funding policy and assumptions disclosed in the Company’s 2012 Annual Report on Form 10-K are expected to continue unchanged throughout 2013.

	Three Months Ended June 30,						Six Months Ended June 30,
(in millions)	2013			2012			2013			2012
Service cost - benefits earned during the period	$	3.6		$	3.7		$	7.1		$	7.3
Interest cost on projected benefit obligation	8.1			8.5			16.2			17.0
Expected return on plan assets	(12.0		)	(10.9		)	(24.0		)	(21.8		)
Settlement loss	—			—			—			3.1
Amortization:
Unrecognized transition obligation	—			—			0.1			0.1
Prior service cost	0.2			0.4			0.6			0.8
Actuarial net loss	6.4			7.0			13.0			14.1
Net periodic benefit cost	$	6.3		$	8.7		$	13.0		$	20.6

Costs for defined contribution pension plans were $4.3 million and $9.3 million for the three and six months ended June 30, 2013, respectively. Costs for defined contribution pension plans were $5.5 million and $10.8 million for the three and six months ended June 30, 2012, respectively.  Benefit costs for other post retirement plans were not significant during the periods presented.