Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 29.2	$ 25.3	$ 81.1	$ 70.1
Other comprehensive income (loss):
Change in foreign currency translation adjustment	(4.2)	4.4	(3.4)	(0.5)
Change in unrecognized net actuarial loss and prior service cost related to pension benefit plans, net of income tax expense of $0.2, $0.2, $0.7 and $0.6 respectively	1.4	0.3	3.1	3.0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	0.1	0.1	0.9	(3.3)
Total other comprehensive (loss) income	(2.7)	4.8	0.6	(0.8)
Comprehensive income	$ 26.5	$ 30.1	$ 81.7	$ 69.3