CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Beginning Balance at Dec. 31, 2018	$ 2,597.1	$ 0.9	$ 1,162.6	$ 1,789.2	$ (365.3)	$ 9.7
Beginning Balance (in shares) at Dec. 31, 2018		90.7
Net loss	(37.6)			(37.8)		0.2
Currency translation adjustment	8.5				8.2	0.3
Change in qualifying cash flow hedge, net of tax expense	0.2				0.2
Issuance of common stock for exercise of options, RSU vesting, and employee stock purchases, net	(2.0)		(2.0)
Issuance of common stock for exercise of options, RSU vesting, and employee stock purchases, net (in shares)		0.1
Stock compensation expense	4.3		4.3
Changes to noncontrolling interest			6.3			(6.3)
Ending Balance at Mar. 31, 2019	2,570.5	$ 0.9	1,171.2	1,751.4	(356.9)	3.9
Ending Balance (in shares) at Mar. 31, 2019		90.8
Beginning Balance at Dec. 31, 2019	2,334.7	$ 0.9	1,205.7	1,442.4	(318.1)	3.8
Beginning Balance (in shares) at Dec. 31, 2019		91.2
Net loss	(19.9)			(20.1)		0.2
Currency translation adjustment	(39.1)				(39.1)
Issuance of common stock for exercise of options, RSU vesting, and employee stock purchases, net	1.9		1.9
Issuance of common stock for exercise of options, RSU vesting, and employee stock purchases, net (in shares)		0.2
Stock compensation expense	5.1		5.1
Cumulative effect of adopting ASU | ASU 2016-13	(2.5)			(2.5)
Ending Balance at Mar. 31, 2020	$ 2,280.2	$ 0.9	$ 1,212.7	$ 1,419.8	$ (357.2)	$ 4.0
Ending Balance (in shares) at Mar. 31, 2020		91.4