Other Comprehensive Loss - AOCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Foreign currency translation, net of tax	$ (17.0)	$ (34.5)	$ (60.1)	$ (45.4)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Parent	0.0	(0.3)	(0.2)	(0.3)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance			(53.3)	36.5
Other comprehensive loss	(18.4)	(34.2)	(62.0)	(45.1)
Separation-related adjustments				(7.5)
Ending balance	(115.3)	(16.1)	(115.3)	(16.1)
Cash flow hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance			(0.2)
Other comprehensive loss			(2.1)
Ending balance	(2.3)		(2.3)
Cumulative foreign currency translation adjustments
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Foreign currency translation, net of tax			(60.1)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance			(41.4)	44.4
Other comprehensive loss			(60.1)	(45.4)
Separation-related adjustments				(7.2)
Ending balance	(101.5)	(8.2)	(101.5)	(8.2)
Employee benefit plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance			(11.7)	(7.9)
Other comprehensive loss			0.2	0.3
Separation-related adjustments				(0.3)
Ending balance	$ (11.5)	$ (7.9)	$ (11.5)	$ (7.9)