Condensed Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Treasury Stock
Balance at beginning of period at Dec. 31, 2022		$ 0.4	$ 606.7	$ (107.9)	$ 104.3	$ (65.7)
Increase (Decrease) in Stockholders' Equity
Stock compensation plans			(4.0)			3.0
Stock-based compensation expense			3.1
Other comprehensive loss				(0.1)
Net Income (Loss)	$ 16.5				16.5
Common stock repurchases						(3.5)
Balance at end of period at Mar. 31, 2023	552.8	0.4	605.8	(108.0)	120.8	(66.2)
Balance at beginning of period at Dec. 31, 2023		0.4	613.1	(86.4)	143.5	(67.3)
Increase (Decrease) in Stockholders' Equity
Stock compensation plans			(8.3)			5.3
Stock-based compensation expense			3.7
Other comprehensive loss				(12.5)
Net Income (Loss)	4.5				4.5
Common stock repurchases						0.0
Balance at end of period at Mar. 31, 2024	$ 596.0	$ 0.4	$ 608.5	$ (98.9)	$ 148.0	$ (62.0)