XML 199 R183.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Disposal of Subsidiaries - Summary of Analysis of Assets and Liabilities on Date Control was Lost (Detail) - 1 months ended Jun. 30, 2017 - KSDY [member] $ in Thousands, $ in Thousands | TWD ($) | USD ($) | USD ($)
--- | --- | --- | ---
Current assets |  |  |
Cash and cash equivalents | $ 29,133 |  | $ 983
Inventories related to real estate business | 1,427,874 |  | $ 48,174
Net assets disposed of | $ 1,457,007 | $ 49,157 |

X
- Definition Disposal Group cash and cash equivalent current. + References No definition available. + Details
Name: | asx_DisposalGroupCashAndCashEquivalentCurrent
Namespace Prefix: | asx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Disposal group, current assets. + References No definition available. + Details
Name: | asx_DisposalGroupCurrentAssetsAbstract
Namespace Prefix: | asx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disposal group inventories related to real estate business. + References No definition available. + Details
Name: | asx_DisposalGroupInventoriesRelatedToRealEstateBusiness
Namespace Prefix: | asx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of assets, other than cash or cash equivalents, in subsidiaries or other businesses over which control is obtained or lost. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2017-01-01 -Paragraph 40 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=para_40_d&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_AssetsOtherThanCashOrCashEquivalentsInSubsidiaryOrBusinessesAcquiredOrDisposed2013
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=asx_KSDYMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |