Other Comprehensive Loss - OCI - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Foreign currency translation adjustments [Abstract]
Foreign currency translation	$ (7.5)	$ 4.0
Foreign currency translation, tax	0.0	0.0
Foreign currency translation, net of tax	(7.5)	4.0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax, Attributable to Parent [Abstract]
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent	(0.2)	(0.1)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax, Attributable to Parent	(0.3)	0.0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent	(0.1)	0.1
Changes in fair value of cash flow hedges:
Changes in fair value of cash flow hedges, before tax	(1.2)	0.9
Changes in fair value of cash flow hedges, tax	0.1	(0.2)
Changes in fair value of cash flow hedges, net of tax	(1.1)	0.7
Total other comprehensive earnings [Abstract]
Other comprehensive loss, before tax	(8.5)	5.0
Other comprehensive loss, tax	(0.2)	(0.2)
Other comprehensive (loss) earnings, net of tax	$ (8.7)	$ 4.8