Other Comprehensive Loss - AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	$ 0.3	$ 0.3	$ 1.7	$ 0.2
Foreign currency translation, net of tax	5.4	(4.0)	20.1	9.9
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance		(116.6)	(132.1)	(126.2)
Other comprehensive earnings	6.7	(5.9)	23.4	9.6
Ending balance	(108.7)		(108.7)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance		(1.9)	(3.2)	(1.6)
Other comprehensive earnings			3.3	(0.3)
Ending balance	0.1		0.1
Cumulative foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance		(103.2)	(112.3)	(113.1)
Other comprehensive earnings			20.1	9.9
Ending balance	(92.2)		(92.2)
Employee benefit plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance		$ (11.5)	(16.6)	(11.5)
Other comprehensive earnings			0.0	$ 0.0
Ending balance	$ (16.6)		$ (16.6)