Shareholders' Equity - Other Comprehensive Loss and Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance as of beginning of period	$ 1,905.9	$ 1,859.4	$ 1,670.5
Other comprehensive loss	(47.0)	(46.2)	(30.8)
Balance as of end of period	1,940.0	1,905.9	1,859.4
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance as of beginning of period	(108.7)	(59.2)
Other comprehensive loss	(40.4)	(45.4)
Less: Net other comprehensive income attributable to noncontrolling interest	1.6	(4.0)
Balance as of end of period	(147.5)	(108.7)	(59.2)
Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance as of beginning of period	(0.8)	0.0
Other comprehensive loss	(6.6)	(0.8)
Less: Net other comprehensive income attributable to noncontrolling interest	0.0	0.0
Balance as of end of period	(7.4)	(0.8)	0.0
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance as of beginning of period	(109.5)	(59.2)
Other comprehensive loss	(47.0)	(46.2)
Less: Net other comprehensive income attributable to noncontrolling interest	1.6	(4.0)
Balance as of end of period	$ (154.8)	$ (109.5)	$ (59.2)