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 (in shares) at Dec. 31, 2020		91.6
Beginning Balance at Dec. 31, 2020	$ 2,434.4	$ 0.9	$ 1,234.0	$ 1,382.6	$ (187.4)	$ 4.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(26.8)			(27.8)		1.0
Currency translation adjustment	(35.5)				(35.2)	(0.3)
Cumulative currency translation loss realized through divestitures	3.8				3.8
Issuance of common stock for incentive stock programs, net of (payments of) taxes from withheld shares (in shares)		0.3
Issuance of common stock for incentive stock programs, net of (payments of) taxes from withheld shares	0.7		0.7
Stock-based compensation expense	27.1		27.1
Changes to noncontrolling interest	(0.9)					(0.9)
Ending Balance (in shares) at Dec. 31, 2021		91.9
Ending Balance at Dec. 31, 2021	2,402.8	$ 0.9	1,261.8	1,354.8	(218.8)	4.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	56.5			56.0		0.5
Currency translation adjustment	(58.1)				(58.1)
Issuance of common stock for incentive stock programs, net of (payments of) taxes from withheld shares (in shares)		0.3
Issuance of common stock for incentive stock programs, net of (payments of) taxes from withheld shares	(1.5)		(1.5)
Stock-based compensation expense	25.1		25.1
Changes to noncontrolling interest	(0.3)					(0.3)
Ending Balance (in shares) at Dec. 31, 2022		92.2
Ending Balance at Dec. 31, 2022	2,424.5	$ 0.9	1,285.4	1,410.8	(276.9)	4.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(21.3)			(21.4)		0.1
Currency translation adjustment	19.3				21.8	(2.5)
Cumulative currency translation loss realized through divestitures	70.6				70.6
Issuance of common stock for incentive stock programs, net of (payments of) taxes from withheld shares (in shares)		0.4
Issuance of common stock for incentive stock programs, net of (payments of) taxes from withheld shares	(2.1)		(2.1)
Stock-based compensation expense	33.4		33.4
Changes to noncontrolling interest	(1.5)					(1.5)
Ending Balance (in shares) at Dec. 31, 2023		92.6
Ending Balance at Dec. 31, 2023	$ 2,522.9	$ 0.9	$ 1,316.7	$ 1,389.4	$ (184.5)	$ 0.4