Supplemental Information (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Other Operating Expense, Net [Abstract]
Foreign currency transaction losses, net		$ 3.1	$ 2.6
Restructuring charges	[1]	2.0	0.0
Stock-based compensation	[2]	9.3	2.7
Shareholder litigation settlement recoveries	[3]	(6.0)	(4.5)
Acquisition related expenses and non-cash charges	[4]	1.5	3.0
Losses (gains) on asset disposals		0.1	(1.2)
Other, net		1.2	1.7
Total other operating expense, net		11.2	4.3
Share-based Compensation [Abstract]
Stock-based compensation expense recognized		7.5	3.4
Increase in stock-based compensation expense due to costs associated with employer taxes		$ 1.8
Decrease in stock-based compensation expense due to reduction of an accrual related to employer taxes			$ 0.7

[1] See Note 3 "Restructuring."

[2] Represents stock-based compensation expense recognized for the three month period ended March 31, 2019 of $7.5 million, increased by $1.8 million due to costs associated with employer taxes. Represents stock-based compensation expense recognized for the three month period ended March 31, 2018 of $3.4 million, decreased by $0.7 million due to the reduction of an accrual related to 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.