Amount of fine imposed.

No definition available.

Name:	asx_AmountOfFineImposed
Namespace Prefix:	asx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Disclosure detailed information about others.

+ References

No definition available.

+ Details

Name:	asx_DisclosureDetailedInformationAboutOthersLineItems
Namespace Prefix:	asx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of consideration paid or received in respect of both obtaining and losing control of subsidiaries or other businesses. [Refer: Total for all subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 7
-IssueDate 2024-01-01
-Paragraph 40
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_40_a&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_ConsiderationPaidReceived
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The gain on settlements of litigation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 98
-Subparagraph f
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_98_f&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_GainsOnLitigationSettlements
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of income arising from fines and penalties.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_IncomeFromFinesAndPenalties
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of expenses that the entity does not separately disclose in the same statement or note when the entity uses the 'function of expense' form for its analysis of expenses.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 26
-IssueDate 2024-01-01
-Paragraph 35
-Subparagraph b
-Clause vii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=26&code=ifrs-tx-2024-en-r&anchor=para_35_b_vii&doctype=Standard
-URIDate 2024-03-27

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 103
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_103&doctype=Standard
-URIDate 2024-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 99
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_99&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_OtherExpenseByFunction
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The percentage of voting equity interests acquired in a business combination. [Refer: Total for all business combinations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2024-01-01
-Paragraph B64
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B64_c&doctype=Appendix&subtype=B
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_PercentageOfVotingEquityInterestsAcquired
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	asx_IncomeStatementLocation1Axis=asx_CorporateSocialResponsibilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=asx_GaptHoldingsLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=asx_ResolutionToEnhanceTheShareholdingInTheInvesteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	asx_ClassificationOfFineAxis=asx_OriginalFineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	asx_ClassificationOfFineAxis=asx_NewFineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Others - Additional Information (Detail) $ in Thousands, $ in Thousands							1 Months Ended	12 Months Ended
	Jul. 10, 2024 TWD ($)	Jul. 10, 2024 USD ($)	Jul. 10, 2020 TWD ($)	Jul. 10, 2020 USD ($)	Feb. 10, 2020 TWD ($)	Dec. 27, 2019 TWD ($)	Dec. 31, 2013 TWD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 TWD ($)	Jan. 01, 2024
Disclosure Detailed Information About Others [Line Items]
Administrative fine imposed			$ 260	$ 8
Contribution received from Environmental Protection						$ 55,062
Income from fines and penalties	$ 46,952	$ 1,432
Consideration paid received									$ 2,354,938
Corporate social responsibilities [Member]
Disclosure Detailed Information About Others [Line Items]
Social security contributions	$ 50,000	$ 1,525
GAPT Holdings limited [Member]
Disclosure Detailed Information About Others [Line Items]
Consideration paid received								$ 380,000
Resolution To Enhance The Shareholding In The Investee [Member] \| GAPT Holdings limited [Member]
Disclosure Detailed Information About Others [Line Items]
Percentage of voting equity interests acquired										16.48%
Original Fine [Member]
Disclosure Detailed Information About Others [Line Items]
Administrative fine imposed							$ 102,014
New Fine [Member]
Disclosure Detailed Information About Others [Line Items]
Administrative fine imposed					$ 46,952