Accumulated Other Comprehensive Income - Changes in the Components of AOCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015			$ 1,055.3
Other comprehensive income	$ (0.2)	$ (13.9)	4.9	$ (23.7)
Balance, September 30, 2016	1,101.5		1,101.5
Total Other Comprehensive (Loss) Income, Net of Tax	(0.2)	(13.9)	4.9	(23.7)
Unrealized Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015			(40.4)
Other comprehensive income			3.0
Balance, September 30, 2016	(37.4)		(37.4)
Unrealized translation	(0.5)	(12.5)	3.0	(22.3)
Total Other Comprehensive (Loss) Income, Net of Tax			3.0
Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015			(1.2)
Other comprehensive income			1.7
Balance, September 30, 2016	0.5		0.5
Cash flow hedges	0.2	(2.0)	2.1	(2.3)
Tax effect	0.0	0.6	(0.4)	0.7
Cash flow hedges, net of tax	0.2	(1.4)	1.7	(1.6)
Total Other Comprehensive (Loss) Income, Net of Tax			1.7
Defined Benefit Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015			(1.6)
Other comprehensive income			0.2
Balance, September 30, 2016	(1.4)		(1.4)
Defined benefit pension plans	0.1	0.0	0.2	0.2
Tax effect	0.0	0.0	0.0	0.0
Defined benefit pension plans, net of tax	0.1	$ 0.0	0.2	$ 0.2
Total Other Comprehensive (Loss) Income, Net of Tax			0.2
AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015			(43.2)
Other comprehensive income			4.9
Balance, September 30, 2016	$ (38.3)		(38.3)
Total Other Comprehensive (Loss) Income, Net of Tax			$ 4.9