Hedging Transactions and Derivative Financial Instruments (Notional Values of Derivative Instruments) (Detail) - Not Designated as Hedging Instrument - Foreign Exchange Forward	Dec. 31, 2018 USD ($)
USD/KRW Notional Amount of Foreign Currency Derivatives
Derivative [Line Items]
Notional values of foreign currency derivatives	$ 1,325,760,000
JPY/EUR Notional Amount of Foreign Currency Derivatives
Derivative [Line Items]
Notional values of foreign currency derivatives	675,000,000
EUR/USD Notional Amount of Foreign Currency Derivatives
Derivative [Line Items]
Notional values of foreign currency derivatives	10,449,335
USD/CNY Notional Amount of Foreign Currency Derivatives
Derivative [Line Items]
Notional values of foreign currency derivatives	$ 23,655,942