Hedging Transactions and Derivative Financial Instruments (Notional Values of Derivative Instruments) (Detail)	Dec. 31, 2015 JPY (¥) T / mo	Dec. 31, 2015 USD ($) T / mo	Dec. 31, 2015 KRW (₩) T / mo	Dec. 31, 2015 CNY (¥) T / mo	Dec. 31, 2015 EUR (€) T / mo
Copper Derivative Instruments | Copper January 2016 - March 2016
Derivative [Line Items]
Notional Value of Copper Derivatives	150	150	150	150	150
Copper Derivative Instruments | Copper April 2016 - June 2016
Derivative [Line Items]
Notional Value of Copper Derivatives	130	130	130	130	130
Copper Derivative Instruments | Copper July 2016 - September 2016
Derivative [Line Items]
Notional Value of Copper Derivatives	127	127	127	127	127
Copper Derivative Instruments | Copper October 2016 - December 2016
Derivative [Line Items]
Notional Value of Copper Derivatives	117	117	117	117	117
Copper Derivative Instruments | Copper January 2017 - March 2017
Derivative [Line Items]
Notional Value of Copper Derivatives	16	16	16	16	16
Foreign Currency Derivative Instruments | YEN/USD Notional Amount of Foreign Currency Derivatives
Derivative [Line Items]
Notional Values of Foreign Currency Derivatives | ¥	¥ 155,000,000
Foreign Currency Derivative Instruments | USD/KRW Notional Amount of Foreign Currency Derivatives
Derivative [Line Items]
Notional Values of Foreign Currency Derivatives | ₩			₩ 7,580,028,000
Foreign Currency Derivative Instruments | CNY/EUR Notional Amount of Foreign Currency Derivatives
Derivative [Line Items]
Notional Values of Foreign Currency Derivatives | ¥				¥ 14,000,000
Foreign Currency Derivative Instruments | EUR/GBP Notional Amount of Foreign Currency Derivatives
Derivative [Line Items]
Notional Values of Foreign Currency Derivatives | €					€ 408,291
Foreign Currency Derivative Instruments | CNY/USD Notional Amount of Foreign Currency Derivatives
Derivative [Line Items]
Notional Values of Foreign Currency Derivatives | ¥				¥ 45,000,000
Foreign Currency Derivative Instruments | USD/EUR Notional Amount of Foreign Currency Derivatives
Derivative [Line Items]
Notional Values of Foreign Currency Derivatives | $		$ 400,000
Foreign Currency Derivative Instruments | YEN/EUR Notional Amount of Foreign Currency Derivatives
Derivative [Line Items]
Notional Values of Foreign Currency Derivatives | ¥	¥ 160,000,000
Foreign Currency Derivative Instruments | EUR/CNH Notional Amount of Foreign Currency Derivatives
Derivative [Line Items]
Notional Values of Foreign Currency Derivatives | €					€ 363,029