v3.24.1

Disposal of Subsidiaries - Additional Information (Detail) - shares shares in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
GAPT Holdings and ASEKS [member]
Disposal of Subsidiaries [Line Items]
Percentage of Ownership (%)				100.00%
Luchu Development Corporation ("Luchu") [member] | A S E [Member]
Disposal of Subsidiaries [Line Items]
Percentage of Ownership (%)		0.00%	67.10%
Luchu Development Corporation ("Luchu") [member] | Hung Ching Development & Construction Co [Member] | ASE Test Limited [member]
Disposal of Subsidiaries [Line Items]
Shares in the subsdiary company disposed off during the period	40,981
Luchu Development Corporation ("Luchu") [member] | Hung Ching Development & Construction Co [Member] | A S E [Member]
Disposal of Subsidiaries [Line Items]
Shares in the subsdiary company disposed off during the period	145,178

X

- References

No definition available.

+ Details

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

X

- Definition

Shares in the subsdiary company disposed off during the period.

+ References

No definition available.

+ Details

Name:	asx_SharesInTheSubsdiaryCompanyDisposedOffDuringThePeriod
Namespace Prefix:	asx_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2023-01-01
-Paragraph 17
-Subparagraph b
-Clause iii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2023-en-r&anchor=para_17_b_iii&doctype=Standard
-URIDate 2023-03-23

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2023-01-01
-Paragraph 16
-Subparagraph b
-Clause iii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2023-en-r&anchor=para_16_b_iii&doctype=Standard
-URIDate 2023-03-23

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2023-01-01
-Paragraph 19B
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2023-en-r&anchor=para_19B_c&doctype=Standard
-URIDate 2023-03-23

+ Details

Name:	ifrs-full_ProportionOfOwnershipInterestInSubsidiary
Namespace Prefix:	ifrs-full_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	asx_OperationsFromContinuingAndDiscontinuedAxis=asx_GAPTHoldingsandASEKSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	asx_InvestorAxis=asx_ASEMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	asx_AcquireeAxis=asx_HungChingDevelopmentConstructionCoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	asx_InvestorAxis=asx_ASETestLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: