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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

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- References

No definition available.

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- 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

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