v3.24.1

Trade Receivables, Net - Summary of Movements of Loss Allowance of Trade Receivables (Detail) - Trade receivables [member] $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023 TWD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 TWD ($)	Dec. 31, 2021 TWD ($)
Disclosure of financial assets [Line Items]
Beginning balance	$ 164,408	$ 5,369	$ 103,353	$ 97,358
Remeasurement of loss allowance	108,672	3,549	59,490	17,078
Acquisition through business combinations	73,689	2,407	0	0
Amounts written off	(8,376)	(274)	0	(399)
Disposal of subsidiaries	0	0	0	(4,637)
Effects of foreign currency exchange differences	2,024	66	1,565	(6,047)
Ending balance	$ 340,417	$ 11,117	$ 164,408	$ 103,353

X

- Definition

Disposal of subsidiaries of allowance on trade receivable.

+ References

No definition available.

+ Details

Name:	asx_DisposalOfSubsidiariesOfAllowanceOnTradeReceivable
Namespace Prefix:	asx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Increase (decrease) through acquisition through business combinations, allowance account for credit losses of financial assets.

+ References

No definition available.

+ Details

Name:	asx_IncreaseDecreaseThroughAcquisitionThroughBusinessCombinationsAllowanceAccountForCreditLossesOfFinancialAssets
Namespace Prefix:	asx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Increase (decrease) through Net remeasurement of loss allowance, allowance account for credit losses of financial assets.

+ References

No definition available.

+ Details

Name:	asx_IncreaseDecreaseThroughNetRemeasurementOfLossAllowanceAllowanceAccountForCreditLossesOfFinancialAssets
Namespace Prefix:	asx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of an allowance account used to record impairments to financial assets due to credit losses. [Refer: Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expired 2023-01-01
-Name IFRS
-Number 7
-IssueDate 2023-01-01
-Paragraph 16
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b
-URIDate 2023-03-23

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The increase (decrease) in an allowance account for credit losses of financial assets resulting from the net exchange differences arising when the financial statements are translated from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Allowance account for credit losses of financial assets]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expired 2023-01-01
-Name IFRS
-Number 7
-IssueDate 2023-01-01
-Paragraph 16
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b
-URIDate 2023-03-23

+ Details

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

X

- Definition

The decrease in an allowance account for credit losses of financial assets resulting from the utilisation of the allowance. [Refer: Allowance account for credit losses of financial assets]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expired 2023-01-01
-Name IFRS
-Number 7
-IssueDate 2023-01-01
-Paragraph 16
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b
-URIDate 2023-03-23

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Balance Type:	debit
Period Type:	duration

X

- Details

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Namespace Prefix:
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