Derivative Financial Instruments - Outstanding Foreign Currency Forward Contracts that were Entered into to Hedge Forecasted Cash Flows (Details) - Mar. 31, 2017 € in Millions, ₩ in Millions, £ in Millions	EUR (€)	GBP (£)	KRW (₩)
Foreign Exchange Contract [Member]
Derivative [Line Items]
Notional Amount	€ 54.2	£ 4.5	₩ 21,177.9