Equity - Schedule of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions	3 Months Ended					9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 571.2	$ 540.8	$ 525.3	$ 508.6	$ 489.6	$ 544.0	$ 489.6
Other comprehensive loss before reclassifications						1.2	0.7
Amounts reclassified from accumulated other comprehensive loss							(1.1)
Ending balance	566.6	571.2	543.6	525.3	508.6	566.6	543.6
Foreign currency adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance					(48.0)	(48.3)	(48.0)
Other comprehensive loss before reclassifications						1.4	(1.9)
Amounts reclassified from accumulated other comprehensive loss							0.0
Ending balance	(46.9)		(49.9)			(46.9)	(49.9)
Derivative instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(0.2)	0.0	(0.8)	(1.3)	(1.2)	0.0	(1.2)
Other comprehensive loss before reclassifications	0.2	(0.2)	1.5	0.8	0.3	(0.2)	2.6
Amounts reclassified from accumulated other comprehensive loss	(0.2)		(0.4)	(0.3)	(0.4)		(1.1)
Ending balance	(0.2)	(0.2)	0.3	(0.8)	(1.3)	(0.2)	0.3
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(50.1)	(50.1)	(48.8)	(48.3)	(49.2)	(48.3)	(49.2)
Ending balance	$ (47.1)	$ (50.1)	$ (49.6)	$ (48.8)	$ (48.3)	$ (47.1)	$ (49.6)