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, 2023		$ 0.4	$ 613.1	$ (86.4)	$ 143.5	$ (67.3)
Increase (Decrease) in Stockholders' Equity
Stock compensation plans			(0.7)			5.8
Other comprehensive income (loss)				5.8
Net income (loss)	$ (0.9)				(0.9)
Common stock repurchases						(5.7)
Balance at end of period at Sep. 30, 2024	607.6	0.4	612.4	(80.6)	142.6	(67.2)
Balance at beginning of period at Jun. 30, 2024		0.4	610.1	(100.5)	149.6	(67.3)
Increase (Decrease) in Stockholders' Equity
Stock compensation plans			2.3			0.1
Other comprehensive income (loss)				19.9
Net income (loss)	(7.0)				(7.0)
Common stock repurchases						0.0
Balance at end of period at Sep. 30, 2024	607.6	0.4	612.4	(80.6)	142.6	(67.2)
Balance at beginning of period at Dec. 31, 2024		0.4	615.1	(107.6)	199.3	(67.1)
Increase (Decrease) in Stockholders' Equity
Stock compensation plans			(0.5)			4.0
Other comprehensive income (loss)				38.9
Net income (loss)	0.2				0.2
Common stock repurchases						0.0
Balance at end of period at Sep. 30, 2025	682.7	0.4	614.6	(68.7)	199.5	(63.1)
Balance at beginning of period at Jun. 30, 2025		0.4	613.6	(64.0)	194.5	(63.2)
Increase (Decrease) in Stockholders' Equity
Stock compensation plans			1.0			0.1
Other comprehensive income (loss)				(4.7)
Net income (loss)	5.0				5.0
Common stock repurchases						0.0
Balance at end of period at Sep. 30, 2025	$ 682.7	$ 0.4	$ 614.6	$ (68.7)	$ 199.5	$ (63.1)