Pensions (Tables)

9 Months Ended

Sep. 30, 2019

Retirement Benefits [Abstract]

Summary of Components of Net Periodic Pension Expense (Benefit)

The following table summarizes the components of net periodic pension expense (benefit): 

	U.S. Benefit Plan												Non-U.S. Benefit Plan
	Three Months Ended   September 30,						Nine Months Ended   September 30,						Three Months Ended   September 30,						Nine Months Ended   September 30,
(in millions)	2019			2018			2019			2018			2019			2018			2019			2018
Service cost	$	—		$	—		$	—		$	—		$	—		$	—		$	0.1		$	0.1
Interest cost	1.7			1.6			5.1			4.8			0.3			0.3			1.0			1.0
Amortization of actuarial loss	0.8			0.8			2.0			2.3			0.2			0.2			0.5			0.5
Amortization of prior service cost	—			—			—			—			—			—			0.1			—
Expected return on plan assets	(2.1		)	(2.2		)	(6.5		)	(6.6		)	(0.5		)	(0.5		)	(1.5		)	(1.7		)
Net periodic pension expense (benefit)	$	0.4		$	0.2		$	0.6		$	0.5		$	—		$	—		$	0.2		$	(0.1	)