Supplemental Information (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Other Operating Expense, Net [Abstract]
Foreign currency transaction losses (gains), net		$ 0.6	$ (2.4)	$ 3.7	$ 0.2
Restructuring charges, net	[1]	0.8	0.0	2.8	0.0
Stock-based compensation	[2]	7.1	(0.8)	16.4	1.9
Shareholder litigation settlement recoveries	[3]	0.0	0.0	(6.0)	(4.5)
Acquisition related expenses and non-cash charges	[4]	17.1	2.9	18.7	5.9
Gains on asset disposals		(0.4)	0.0	(0.3)	(1.2)
Other, net		0.1	0.9	1.1	2.6
Total other operating expense, net		25.3	0.6	36.4	4.9
Share-based Compensation [Abstract]
Stock-based compensation expense recognized		6.0	1.8	13.6	5.2
Increase in stock-based compensation expense due to costs associated with employer taxes		$ 1.1		$ 2.8
Decrease in stock-based compensation expense due to reduction of an accrual related to employer taxes			$ 2.6		$ 3.3

[1] See Note 3 “Restructuring.”

[2] Represents stock-based compensation expense recognized for the three month and six month periods ended June 30, 2019 of $6.0 million and $13.6 million, respectively, increased by $1.1 million and $2.8 million for the three month and six month periods ended June 30, 2019, respectively, due to costs associated with employer taxes.

[3] Represents an insurance recovery of the Company’s shareholder litigation settlement in 2014.

[4] Represents costs associated with successful and/or abandoned acquisitions, including third-party expenses, post-closure integration costs (including certain incentive and non-incentive cash compensation costs), and non-cash charges and credits arising from fair value purchase accounting adjustments.