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Borrowings - Additional Information (Detail) - Dec. 31, 2024 - ASX Bank Loans [Member] $ in Thousands, $ in Thousands | TWD ($) | USD ($)
--- | --- | ---
January To March 2024 [Member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Amount of bank loan repaid | $ 16,461,821 |
January To March 2025 [Member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Amount of bank loan repaid | $ 28,489,463 | $ 868,846

X
- Definition Amount of bank loan settled. + References No definition available. + Details
Name: | asx_AmountOfBankLoanSettled
Namespace Prefix: | asx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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- Details
Name: | ifrs-full_BorrowingsByNameAxis=asx_AsxBankLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | asx_SettlementAxis=asx_JanuaryToMarch2024Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | asx_SettlementAxis=asx_JanuaryToMarch2025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |