Accumulated Other Comprehensive Income - Net Changes in Components of AOCI, Including Tax Effect (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Equity [Abstract]
Unrealized translation	$ 4.9	$ 1.9	$ (10.1)	$ 2.6
Defined benefit pension plans	0.0	0.0	0.3	0.0
Tax effect	0.0	0.0	(0.1)	0.0
Defined benefit pension plans, net of tax	0.0	0.0	0.2	0.0
Cash flow hedges	0.0	0.0	(0.1)	0.0
Tax effect	0.0	0.0	0.0	0.0
Cash flow hedges, net of tax	0.0	0.0	(0.1)	0.0
Total Other Comprehensive Income (Loss), net of tax	$ 4.9	$ 1.9	$ (10.0)	$ 2.6

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Amount before tax, after reclassification adjustments of gain (loss) on foreign currency translation adjustments, on foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to parent entity.

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