Pension and Other Postretirement Benefit Plans

6 Months Ended

Jun. 30, 2016

Compensation and Retirement Disclosure [Abstract]

Pension and Other Postretirement Benefit Plans

Pension Benefits

The components of net periodic cost are as follows:

	Pension Benefits
	Three Months Ended June 30,						Six Months Ended June 30,
(in millions)	2016			2015			2016			2015
Service cost	$	1.2		$	1.2		$	2.3		$	2.7
Interest cost	8.2			9.4			16.4			19.0
Expected return on plan assets	(14.5		)	(15.4		)	(28.9		)	(31.2		)
Amortization of prior service cost	(0.2		)	(0.2		)	(0.4		)	(0.1		)
Amortization of net loss (gain)	2.9			3.1			5.8			6.2
Net periodic cost	$	(2.4	)	$	(1.9	)	$	(4.8	)	$	(3.4	)

The Company expects, based on current actuarial calculations, to contribute approximately $8.0 million to its defined benefit plans, of which $4.1 million has been contributed during the first six months of 2016. The Company contributed $17.0 million to its defined benefit plans in 2015. Cash contributions for subsequent years will depend on a number of factors, including the impact of the Pension Protection Act signed into law in 2006, changes in minimum funding requirements, long-term interest rates, the investment performance of plan assets and changes in employee census data affecting the Company’s projected benefit obligations.