Hedging Transactions and Derivative Financial Instruments (Notional Values of Foreign Currency Derivatives) (Detail) - Dec. 31, 2020 - Contracts not designated as hedging instruments - Foreign Exchange Forward	USD ($)	EUR (€)	KRW (₩)
USD/CNH
Derivative [Line Items]
Notional Values of Foreign Currency Derivatives | $	$ 28,766,855
EUR/USD
Derivative [Line Items]
Notional Values of Foreign Currency Derivatives | €		€ 8,151,124
KRW/USD
Derivative [Line Items]
Notional Values of Foreign Currency Derivatives | ₩			₩ 10,893,500,000