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			(4.3)			3.3
Stock-based compensation expense			5.4
Other comprehensive income (loss)				6.0
Net income	$ 36.7				36.7
Common stock repurchases						(5.5)
Balance at end of period at Jun. 30, 2023	579.4	0.4	607.8	(101.9)	141.0	(67.9)
Balance at beginning of period at Mar. 31, 2023		0.4	605.8	(108.0)	120.8	(66.2)
Increase (Decrease) in Stockholders' Equity
Stock compensation plans			(0.3)			0.3
Stock-based compensation expense			2.3
Other comprehensive income (loss)				6.1
Net income	20.2				20.2
Common stock repurchases						(2.0)
Balance at end of period at Jun. 30, 2023	579.4	0.4	607.8	(101.9)	141.0	(67.9)
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			(8.6)			5.7
Stock-based compensation expense			5.6
Other comprehensive income (loss)				(14.1)
Net income	6.1				6.1
Common stock repurchases						(5.7)
Balance at end of period at Jun. 30, 2024	592.3	0.4	610.1	(100.5)	149.6	(67.3)
Balance at beginning of period at Mar. 31, 2024		0.4	608.5	(98.9)	148.0	(62.0)
Increase (Decrease) in Stockholders' Equity
Stock compensation plans			(0.3)			0.4
Stock-based compensation expense			1.9
Other comprehensive income (loss)				(1.6)
Net income	1.6				1.6
Common stock repurchases						(5.7)
Balance at end of period at Jun. 30, 2024	$ 592.3	$ 0.4	$ 610.1	$ (100.5)	$ 149.6	$ (67.3)