Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 100.6	$ 96.2	$ 108.5
Other comprehensive income (loss):
Change in foreign currency translation adjustment	(4.7)	8.4	1.8
Change in unrecognized net actuarial loss and prior service cost related to pension benefit plans, net of income tax expense (benefit) of $6.1, $(2.2) and $1.9, respectively	20.5	(8.0)	7.1
Change in unrealized gain or loss on interest rate swaps, net of income tax expense (benefit) of $0.6, $(1.0) and $(0.3), respectively	1.7	(3.0)	(0.7)
Total other comprehensive income (loss)	17.5	(2.6)	8.2
Comprehensive income	$ 118.1	$ 93.6	$ 116.7