Discontinued Operations (Schedule of Business Details and Line Items Comprising Discontinued Operations on Statements of Operations and Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain (loss) on disposal of discontinued business	$ (0.4)	$ (5.0)
Income tax expense (benefit)	1.7	(1.4)
(Loss) from disposal of discontinued business, net of tax	(2.1)	(3.6)
Net (loss) from discontinued operations	(2.1)	(3.6)
EMEA and Pacific Rim Business [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain (loss) on disposal of discontinued business	(0.4)	(5.0)
Income tax expense (benefit)	1.7	(1.4)
(Loss) from disposal of discontinued business, net of tax	(2.1)	(3.6)
Net (loss) from discontinued operations	$ (2.1)	$ (3.6)