XML 180 R162.htm IDEA: XBRL DOCUMENT
v3.25.1

Segment Information - Schedule of Geographical Information (Detail) - TWD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Non-current assets [abstract] |  |
Total non-current assets | $ 21,124,011 | $ 20,367,567
ROC [member] |  |
Non-current assets [abstract] |  |
Total non-current assets | 21,120,719 | 20,360,166
PRC [member] |  |
Non-current assets [abstract] |  |
Total non-current assets | 2,861 | 1,279
Others [Member] |  |
Non-current assets [abstract] |  |
Total non-current assets | $ 431 | $ 6,122

X
- References No definition available. + Details
Name: | ifrs-full_NoncurrentAssetsAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of non-current assets other than financial instruments, deferred tax assets, post-employment benefit assets and rights arising under insurance contracts. [Refer: Deferred tax assets; Classes of financial instruments [domain]; Non-current assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2024-01-01 -Paragraph 33 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_33_b&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_NoncurrentAssetsOtherThanFinancialInstrumentsDeferredTaxAssetsPostemploymentBenefitAssetsAndRightsArisingUnderInsuranceContracts
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_TW
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_CN
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=imos_OthersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |