Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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- Definition

Nominal or face amount used to calculate payments on the derivative asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Hedging Transactions and Derivative Financial Instruments (Notional Values of Derivative Instruments) (Details)	Sep. 30, 2017 JPY (¥) T	Sep. 30, 2017 EUR (€) T	Sep. 30, 2017 USD ($) T	Sep. 30, 2017 KRW (₩) T
Contracts not designated as hedging instruments \| KRW/USD \| Foreign Exchange Forward
Derivative [Line Items]
Notional Values of Foreign Currency Derivatives \| ₩				₩ 3,281,770,000
Contracts not designated as hedging instruments \| JPY/EUR \| Foreign Exchange Forward
Derivative [Line Items]
Notional Values of Foreign Currency Derivatives \| ¥	¥ 350,000,000
Contracts not designated as hedging instruments \| EUR/USD \| Foreign Exchange Forward
Derivative [Line Items]
Notional Values of Foreign Currency Derivatives \| €		€ 4,635,239
Contracts not designated as hedging instruments \| EUR/HUF \| Foreign Exchange Forward
Derivative [Line Items]
Notional Values of Foreign Currency Derivatives \| €		€ 369,885
Contracts not designated as hedging instruments \| USD/CNY \| Foreign Exchange Forward
Derivative [Line Items]
Notional Values of Foreign Currency Derivatives \| $			$ 6,083,500
Contracts designated as hedging instruments \| October 2017 - December 2017
Derivative [Line Items]
Volume of Copper Derivatives	122	122	122	122
Contracts designated as hedging instruments \| January 2018 - March 2018
Derivative [Line Items]
Volume of Copper Derivatives	140	140	140	140
Contracts designated as hedging instruments \| April 2018 - June 2018
Derivative [Line Items]
Volume of Copper Derivatives	139	139	139	139
Contracts designated as hedging instruments \| July 2018 - September 2018
Derivative [Line Items]
Volume of Copper Derivatives	93	93	93	93
Contracts designated as hedging instruments \| October 2018 - December 2018
Derivative [Line Items]
Volume of Copper Derivatives	23	23	23	23