CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net Income (Loss)	$ (49.1)	$ 104.5	$ 112.9
Other comprehensive income (loss), net of tax:
Currency translation	3.7	(28.8)	(7.0)
Total other comprehensive income (loss), net	(9.6)	72.6	44.1
Comprehensive income (loss)	(58.7)	177.1	157.0
Defined benefit pension plans
Other comprehensive income (loss), net of tax:
Defined benefit pension plans	(12.9)	100.2	51.2
Other postretirement benefit plans
Other comprehensive income (loss), net of tax:
Defined benefit pension plans	$ (0.4)	$ 1.2	$ (0.1)