Shareholders' Equity (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Other Comprehensive (Loss) Income [Roll Forward]
Balance as of beginning of period	[1]	$ 1,940.0	$ 1,905.9
Other comprehensive income (loss)	[1]	16.9	1.0
Balance as of end of period	[1]	1,975.6	1,957.2
Foreign Currency Translation Adjustments
Other Comprehensive (Loss) Income [Roll Forward]
Balance as of beginning of period		(147.5)	(108.7)
Other comprehensive income (loss)		6.4	1.3
Less: Net other comprehensive income (loss) attributable to noncontrolling interest		(0.2)	1.6
Balance as of end of period		(141.2)	(108.9)
Derivative Instruments
Other Comprehensive (Loss) Income [Roll Forward]
Balance as of beginning of period		(7.4)	(0.8)
Other comprehensive income (loss)		10.5	(0.2)
Less: Net other comprehensive income (loss) attributable to noncontrolling interest		0.0	0.0
Balance as of end of period		3.1	(1.1)
Accumulated Other Comprehensive Loss
Other Comprehensive (Loss) Income [Roll Forward]
Balance as of beginning of period		(154.8)	(109.5)
Other comprehensive income (loss)		16.9	1.0
Less: Net other comprehensive income (loss) attributable to noncontrolling interest		(0.2)	1.6
Balance as of end of period		$ (138.1)	$ (110.0)

[1] Amounts may not add due to rounding