CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Foreign currency translation adjustment, tax expense	$ 0.0	$ (0.2)	$ 0.4
Projected pension benefit obligation, tax expense (benefit)	0.0	(0.2)	(0.1)
Reclassification of loss on pension settlement, net of tax	(0.2)	(0.8)
Reclassification of foreign currency losses, net of tax expense	0.0	0.2	0.0
Unrealized gain on derivatives net of tax expense	$ 0.6	$ 0.0	$ 0.0