Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Foreign currency translation, tax expense (benefit)	$ 1.0	$ 1.0	$ 1.7
Adjustments to pension and postretirement liability, tax	$ 1.7	$ 1.1	$ 1.0