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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

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