CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Millions	Total	Total Shareholders’ Equity	Common Stock Shares	Common Stock and Additional Paid-In Capital	Treasury Stock	Accumulated Other Comprehensive Loss	Retained Earnings	Noncontrolling Interest
Beginning balance (in shares) at Dec. 31, 2022			90,100
Beginning balance at Dec. 31, 2022	$ 3,039.6	$ 3,039.3		$ 818.1	$ (1,184.3)	$ (126.2)	$ 3,531.7	$ 0.3
Beginning balance (in shares) at Dec. 31, 2022					14,500
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	139.8	139.8					139.8
Cumulative translation adjustment	36.6	36.6				36.6
Net change in retirement obligations (net of tax)	0.4	0.4				0.4
Net issuance of shares of common stock (net of tax) (in shares)					(100)
Net issuance of shares of common stock (net of tax)	0.3	0.3			$ 0.3
Share-based compensation	12.8	12.8		12.8
Ending balance (in shares) at Mar. 31, 2023			90,100
Ending balance at Mar. 31, 2023	3,229.5	3,229.2		830.9	$ (1,184.0)	(89.2)	3,671.5	0.3
Ending balance (in shares) at Mar. 31, 2023					14,400
Beginning balance (in shares) at Dec. 31, 2023			90,100
Beginning balance at Dec. 31, 2023	$ 3,541.2	3,541.4		839.9	$ (1,187.0)	(45.8)	3,934.3	(0.2)
Beginning balance (in shares) at Dec. 31, 2023	14,300				14,300
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 121.3	121.4					121.4	(0.1)
Cumulative translation adjustment	(64.3)	(64.3)				(64.3)
Net change in retirement obligations (net of tax)	(0.1)	(0.1)				(0.1)
Net issuance of shares of common stock (net of tax) (in shares)					(100)
Net issuance of shares of common stock (net of tax)	7.7	7.7			$ 7.7
Share-based compensation	12.5	12.5		12.5
Ending balance (in shares) at Mar. 31, 2024			90,100
Ending balance at Mar. 31, 2024	$ 3,618.3	$ 3,618.6		$ 852.4	$ (1,179.3)	$ (110.2)	$ 4,055.7	$ (0.3)
Ending balance (in shares) at Mar. 31, 2024	14,200				14,200