Pension and Other Postemployment Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2015

Compensation and Retirement Disclosure [Abstract]

Components of net periodic expense of Pension and OPEB plans

The following table presents the components of net periodic expense (benefit) of our Pension plans:

	Pension Benefits
	Three Months Ended March 31,
(in millions)	2015			2014
Service cost	$	0.2		$	0.3
Interest cost	1.5			1.7
Expected return on plan assets	(2.1		)	(2.1		)
Amortization of net loss (gain)	0.5			0.3
Amortization of unrecognized prior service (credit)	—			(0.1		)
Net periodic expense (benefit)	$	0.1		$	0.1