Consolidated Statements of Shareholders' Equity (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Stockholders' Equity [Abstract]
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201602Member
Cash dividends (in dollars per share)	$ 0.622	$ 0.581	$ 0.543
Foreign currency translation adjustment, tax		$ (0.1)
Change in pension benefits, net of tax		0.1
Net (loss) income	$ (82.1)	$ 137.2	$ 352.8