XML 174 R158.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Income Tax - Summary of Current Tax Assets and Liabilities (Detail) $ in Thousands, $ in Thousands | Dec. 31, 2017 TWD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 TWD ($)
--- | --- | --- | ---
Current tax assets |  |  |
Tax refund receivable | $ 28,458 | $ 960 | $ 260,559
Prepaid income tax | 232,084 | 7,830 | 211,193
Current tax assets | 260,542 | 8,790 | 471,752
Current tax liabilities |  |  |
Income tax payable | $ 7,619,328 | $ 257,062 | $ 6,846,350

X
- Definition Current prepaid income tax. + References No definition available. + Details
Name: | asx_CurrentPrepaidIncomeTax
Namespace Prefix: | asx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Current tax assets. + References No definition available. + Details
Name: | asx_CurrentTaxAssetsAbstract
Namespace Prefix: | asx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Current tax liabilities. + References No definition available. + Details
Name: | asx_CurrentTaxLiabilitiesAbstract
Namespace Prefix: | asx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Current tax refund receivable. + References No definition available. + Details
Name: | asx_CurrentTaxRefundReceivable
Namespace Prefix: | asx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The current amount of current tax assets. [Refer: Current tax assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 54 -Subparagraph n -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_n&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_CurrentTaxAssetsCurrent
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The current amount of current tax liabilities. [Refer: Current tax liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 54 -Subparagraph n -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_n&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_CurrentTaxLiabilitiesCurrent
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant