CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) - 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, 2022		92.2
Beginning 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 (loss) income	(36.1)			(36.3)		0.2
Currency translation adjustments	(7.8)				(5.5)	(2.3)
Cumulative currency translation loss realized from divestitures	70.6				70.6
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	(1.6)		(1.6)
Stock-based compensation expense	28.2		28.2
Changes in noncontrolling interest	(1.5)					(1.5)
Ending Balance (in shares) at Sep. 30, 2023		92.5
Ending Balance at Sep. 30, 2023	2,476.3	$ 0.9	1,312.0	1,374.5	(211.8)	0.7
Beginning Balance (in shares) at Jun. 30, 2023		92.5
Beginning Balance at Jun. 30, 2023	2,482.8	$ 0.9	1,299.8	1,372.5	(191.0)	0.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	2.1			2.0		0.1
Currency translation adjustments	(21.8)				(21.8)
Cumulative currency translation loss realized from divestitures	1.0				1.0
Issuance of common stock for incentive stock programs, net of (payments of) taxes from withheld shares	1.8		1.8
Stock-based compensation expense	10.4		10.4
Ending Balance (in shares) at Sep. 30, 2023		92.5
Ending Balance at Sep. 30, 2023	2,476.3	$ 0.9	1,312.0	1,374.5	(211.8)	0.7
Beginning Balance (in shares) at Dec. 31, 2023		92.6
Beginning Balance at Dec. 31, 2023	2,522.9	$ 0.9	1,316.7	1,389.4	(184.5)	0.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	5.4			5.3		0.1
Currency translation adjustments	13.5				13.6	(0.1)
Cumulative currency translation loss realized from divestitures	0.0
Issuance of common stock for incentive stock programs, net of (payments of) taxes from withheld shares (in shares)		0.2
Issuance of common stock for incentive stock programs, net of (payments of) taxes from withheld shares	(2.3)		(2.3)
Stock-based compensation expense	15.3		15.3
Ending Balance (in shares) at Sep. 30, 2024		92.8
Ending Balance at Sep. 30, 2024	2,554.8	$ 0.9	1,329.7	1,394.7	(170.9)	0.4
Beginning Balance (in shares) at Jun. 30, 2024		92.8
Beginning Balance at Jun. 30, 2024	2,532.5	$ 0.9	1,320.3	1,408.5	(197.6)	0.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(13.7)			(13.8)		0.1
Currency translation adjustments	26.6				26.7	(0.1)
Cumulative currency translation loss realized from divestitures	0.0
Issuance of common stock for incentive stock programs, net of (payments of) taxes from withheld shares	1.7		1.7
Stock-based compensation expense	7.7		7.7
Ending Balance (in shares) at Sep. 30, 2024		92.8
Ending Balance at Sep. 30, 2024	$ 2,554.8	$ 0.9	$ 1,329.7	$ 1,394.7	$ (170.9)	$ 0.4