Derivatives and Hedging Activities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Forward Currency Forward Contracts [Abstract]
Foreign Currency Fair Value Hedge Derivative at Fair Value, Net	$ 235.7	$ 194.1
Foreign Currency Fair Value Hedge Asset at Fair Value	2.2	0.6
Foreign Currency Fair Value Hedge Liability at Fair Value	0.2	0.0
Derivative Instruments in Hedges, Assets, at Fair Value	2.2	0.6
Derivative Instruments in Hedges, Liabilities, at Fair Value	0.2	0.0
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	6.0	11.8
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	0.2	0.3
Derivative Asset	8.2	12.4
Derivative Liability	0.4	0.3
Unrealized Gain on Foreign Currency Derivatives, before Tax	3.0	1.3	$ 0.7
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	0.0	(2.1)	0.0
Unrealized Gain (Loss) on Price Risk Cash Flow Derivatives, before Tax	3.0	(0.8)	0.7
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	1.5	0.2	0.4
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	(0.3)	(0.1)	0.0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	1.2	0.1	0.4
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	(5.7)	19.1	(7.6)
Derivative Instruments Not Designated as Hedging Instruments, Gain	$ (5.7)	$ 19.1	$ (7.6)