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Hedging Financial Instruments - Summary of Hedging Derivatives Financial Instruments (Detail) $ in Millions | Dec. 31, 2017 TWD ($)
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Disclosure of detailed information about hedging instruments [line items] |
Hedging derivative financial instruments, assets | $ 34.4
Interest rate futures contracts [member] | Fair value hedges [member] |
Disclosure of detailed information about hedging instruments [line items] |
Hedging derivative financial instruments, assets | 27.0
Forward exchange contracts [member] | Cash flow hedges [member] |
Disclosure of detailed information about hedging instruments [line items] |
Hedging derivative financial instruments, assets | 7.4
Hedging derivative financial instruments, liabilities | $ 15.6

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- Definition The amount of current derivative financial assets. [Refer: Derivative financial assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard -URIDate 2018-03-16 + Details
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Balance Type: | debit
Period Type: | instant

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- Definition The amount of current derivative financial liabilities. [Refer: Derivative financial liabilities] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard -URIDate 2018-03-16 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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