Derivative Financial Instruments - Additional Information (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($) item	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) item	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Interest Rate Swap Agreements
Derivative [Line Items]
Number of derivative contracts | item	2		2
Average fixed interest rate (as a percent)	0.959%		0.959%		0.754%
Interest Rate Swap Agreements | U.S. dollars
Derivative [Line Items]
Variable Rate Basis			LIBOR
Foreign Currency Forward Exchange Contracts
Derivative [Line Items]
Number of credit contingency features | item			0
Foreign currency unrealized gains expected to be reclassified into earnings over next twelve months, tax	$ 10.5		$ 10.5
Foreign Currency Forward Exchange Contracts | Cash Flow Hedging
Derivative [Line Items]
Gains (losses) in other comprehensive income, effective portion	7.6	$ 0.9	(16.0)	$ 1.7
Designated as Hedging Instrument | Swaps maturing March 2016
Derivative [Line Items]
Notional amount	50.0		50.0
Designated as Hedging Instrument | Swaps maturing September 2016
Derivative [Line Items]
Notional amount	50.0		50.0
Designated as Hedging Instrument | Swaps maturing March 2017
Derivative [Line Items]
Notional amount	50.0		50.0
Designated as Hedging Instrument | Interest Rate Swap Agreements
Derivative [Line Items]
Floating rate obligation					$ 75.0
Notional amount					150.0
Carrying value / fair value of derivative liabilities included in other liabilities	0.5		0.5		0.3
Carrying value / fair value of derivative assets included in other assets					0.1
Designated as Hedging Instrument | Foreign Currency Forward Exchange Contracts
Derivative [Line Items]
Notional amount	375.5		375.5		255.8
Carrying value / fair value of derivative liabilities included in other liabilities	22.1		22.1		12.7
Carrying value / fair value of derivative assets included in other assets	2.5		2.5		0.3
Designated as Hedging Instrument | Foreign Currency Forward Exchange Contracts | Cash Flow Hedging
Derivative [Line Items]
Recorded in gross margin	(5.2)	1.9	(8.8)	3.4
Not Designated as Hedging Instrument | Foreign Currency Forward Exchange Contracts
Derivative [Line Items]
Carrying value / fair value of derivative liabilities included in other liabilities	0.7		0.7		5.5
Carrying value / fair value of derivative assets included in other assets	0.9		0.9		$ 0.8
Net gains (losses) on derivative contracts not designated as hedges	$ 2.5	$ (0.1)	$ (14.1)	$ (0.3)