Pension and Other Postretirement Benefit Plans

9 Months Ended

Sep. 30, 2017

Compensation And Retirement Disclosure [Abstract]

Pension and Other Postretirement Benefit Plans

6. Pension and Other Postretirement Benefit Plans

The components of net periodic pension cost for defined benefit pension and other postretirement benefit plans included in the Company’s results of operations are as follows:

	Three Months Ended September 30,
	2017			2016			2017			2016
(in millions)	Pension Plans						Postretirement Plans
Service cost - benefits earned during the period	$	—		$	0.2		$	—		$	—
Interest cost		6.4			7.4			0.1			0.2
Expected return on plan assets		(6.8	)		(7.4	)		—			—
Recognized net actuarial loss		3.8			2.8			—			—
Amortization of prior service cost		—			—			(0.3	)		(0.3	)
Net periodic pension cost (benefit)	$	3.4		$	3.0		$	(0.2	)	$	(0.1	)
	Nine Months Ended September 30,
	2017			2016			2017			2016
(in millions)	Pension Plans						Postretirement Plans
Service cost - benefits earned during the period	$	—		$	0.6		$	—		$	—
Interest cost		19.3			22.2			0.3			0.4
Expected return on plan assets		(20.4	)		(22.4	)		—			—
Recognized net actuarial loss		11.4			8.4			0.1			0.1
Amortization of prior service cost		—			—			(1.0	)		(1.0	)
Net periodic pension cost (benefit)	$	10.3		$	8.8		$	(0.6	)	$	(0.5	)