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Lease Arrangements - Summary of Right-of-Use Assets (Detail) $ in Thousands, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 TWD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 TWD ($) | Dec. 31, 2022 TWD ($) | Dec. 31, 2024 USD ($)
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |  |
Carrying amounts | $ 11,851,087 |  | $ 11,442,266 |  | $ 361,424
Additions to right-of-use assets | 1,936,186 | $ 59,048 | 1,680,516 | $ 2,140,942 |
Depreciation charge for right-of-use assets | 1,415,140 | 43,158 | 1,304,020 | 1,468,040 |
Land [member] |  |  |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |  |
Carrying amounts | 7,747,283 |  | 7,111,397 |  | 236,270
Depreciation charge for right-of-use assets | 267,959 | 8,172 | 246,617 | 236,673 |
Buildings and improvements [member] |  |  |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |  |
Carrying amounts | 3,492,553 |  | 4,081,525 |  | 106,513
Depreciation charge for right-of-use assets | 855,492 | 26,090 | 726,510 | 660,276 |
Machinery and equipment [member] |  |  |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |  |
Carrying amounts | 545,748 |  | 179,270 |  | 16,644
Depreciation charge for right-of-use assets | 246,799 | 7,527 | 292,936 | 538,639 |
Other equipment [member] |  |  |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |  |
Carrying amounts | 65,503 |  | 70,074 |  | $ 1,997
Depreciation charge for right-of-use assets | $ 44,890 | $ 1,369 | $ 37,957 | $ 32,452 |

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- Definition The amount of additions to right-of-use assets. [Refer: Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 53 -Subparagraph h -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_h&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 53 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_a&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term that do not meet the definition of investment property. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 53 -Subparagraph j -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_j&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 47 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_47_a&doctype=Standard -URIDate 2024-03-27 + Details
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