CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Common Stock in Treasury, at Cost
Balance at Dec. 31, 2021	$ 3,204.3	$ 0.7	$ 792.4	$ 3,238.5	$ (128.6)	$ (698.7)
Net income (loss)	(0.2)			(0.2)
Employee pension and postretirement benefits, net of tax	0.4				0.4
Currency translation adjustments	(6.5)				(6.5)
Gain (loss) on derivative instruments, net of tax	0.8				0.8
Cash dividends	(24.5)			(24.5)
Repurchases of Common Stock	(85.0)					(85.0)
Exercise of stock options	1.9		(0.2)			2.1
Stock-based compensation expense	6.8		6.8
Payment of stock-based restricted and performance shares			(0.5)			0.5
Shares tendered for taxes on stock-based compensation	(0.4)					(0.4)
Other	0.2		(0.3)			0.5
Balance at Mar. 31, 2022	3,097.8	0.7	798.2	3,213.8	(133.9)	(781.0)
Balance at Dec. 31, 2022	3,185.7	0.7	806.0	3,315.0	(92.3)	(843.7)
Net income (loss)	88.5			88.5
Employee pension and postretirement benefits, net of tax	(0.4)				(0.4)
Currency translation adjustments	11.4				11.4
Gain (loss) on derivative instruments, net of tax	(2.0)				(2.0)
Cash dividends	(26.8)			(26.8)
Repurchases of Common Stock	(15.2)					(15.2)
Exercise of stock options	2.5		0.5			2.0
Stock-based compensation expense	6.8		6.8
Payment of stock-based restricted and performance shares			(4.7)			4.7
Shares tendered for taxes on stock-based compensation	(3.4)					(3.4)
Other	0.1		(0.6)			0.7
Balance at Mar. 31, 2023	$ 3,247.2	$ 0.7	$ 808.0	$ 3,376.7	$ (83.3)	$ (854.9)