Derivatives and Hedging - Foreign Exchange Risk Management Narrative (Details) € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2016 EUR (€)
Derivative [Line Items]
(Loss) income on financial instruments	$ (14.0)	$ (24.0)	$ (15.0)
Derivatives designated as a hedge of the foreign currency exposure	$ 227.0			€ 217
Cash Flow Hedging
Derivative [Line Items]
Foreign currency exposures, maximum average hedging period ( in years)	2 years
Not Designated as Hedging Instrument
Derivative [Line Items]
Maximum length of time hedged in foreign currency undesignated hedge (in years)	1 year
Foreign exchange contracts | Not Designated as Hedging Instrument
Derivative [Line Items]
(Loss) income on financial instruments	$ 0.2	$ 8.0	$ 18.0