Other Expense, Net (Tables)

3 Months Ended

Mar. 31, 2018

Other Income and Expenses [Abstract]

Schedule of other expense

	Three Months Ended March 31,
(in millions)	2018			2017
Restructuring expense	$	7.5		$	—
Merger and acquisition expense	2.2			—
Lease termination settlement	—			5.3
Other (income) expense	(4.8		)	0.5
Other expense, net	$	4.9		$	5.8