Accumulated Other Comprehensive Income - Net Changes in Components of AOCI, Including Tax Effect (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Equity [Abstract]
Unrealized translation	$ (15.0)	$ 0.7
Defined benefit pension plans	0.3	0.0
Tax effect	(0.1)	0.0
Defined benefit pension plans, net of tax	0.2	0.0
Cash flow hedges	(0.1)	0.0
Tax effect	0.0	0.0
Cash flow hedges, net of tax	(0.1)	0.0
Total Other Comprehensive (Loss) Income, net of tax	$ (14.9)	$ 0.7