Financial Instruments (Foreign Exchange Risk and Its Classification on Balance Sheet) (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Assets	$ 4,400,000
Liabilities	1,400,000
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Assets	18,000,000
Liabilities	8,300,000
Foreign exchange contracts | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Assets	4,200,000	$ 0
Foreign exchange contracts | Designated as Hedging Instrument | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Assets	4,300,000
Foreign exchange contracts | Designated as Hedging Instrument | Accounts payable and accrued expenses
Derivatives, Fair Value [Line Items]
Liabilities	100,000
Foreign exchange contracts | Not Designated as Hedging Instrument | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Assets	13,600,000
Foreign exchange contracts | Not Designated as Hedging Instrument | Accounts payable and accrued expenses
Derivatives, Fair Value [Line Items]
Liabilities	6,900,000
Interest rate contracts | Designated as Hedging Instrument | Long term borrowings
Derivatives, Fair Value [Line Items]
Assets	100,000
Liabilities	$ 1,300,000