Derivative Instruments - Additional Information (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Sep. 30, 2015 USD ($)
Derivative [Line Items]
Derivative Liability, Notional Amount	$ 977.4		$ 977.4
Cross-currency swap agreements
Derivative [Line Items]
Derivative, Notional Amount	$ 730.9		$ 730.9
Cross-currency swap agreements | Designated as hedges | Net Investment Hedging
Derivative [Line Items]
Nonderivatives designated as hedges, notional amount		$ 235.8
Foreign currency forward contract
Derivative [Line Items]
Derivative, Notional Amount		$ 1,864.5
Forward Exchange Rate (in usd per euro)	1.13		1.13
Derivative, Amount Settled			$ 1,864.5
Gain (loss) on foreign exchange forward	$ (1.9)		(9.7)
Other current liabilities Other long-term liabilities | Interest rate swaps | Not designated as hedges
Derivative [Line Items]
Derivative Liability, Notional Amount	$ 11.2		$ 11.2