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Borrowings - Summary of Short Term Borrowings (Detail) $ in Thousands, $ in Thousands	Dec. 31, 2024 TWD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 TWD ($)
Disclosure of detailed information about borrowings [line items]
Less: financial liabilities for hedging - current	$ (12,456,104)	$ (379,875)	$ (12,516,971)
Short-term borrowings	34,988,758	1,067,056	37,737,217
Short Term Bank Loans [Member]
Disclosure of detailed information about borrowings [line items]
Secured bank loans, annual interest rates were 4.80%-5.40% and 3.81%-4.16% as of December 31, 2023 and 2024, respectively	279,797	8,533	354,064
Unsecured bank loans, annual interest rates were 1.55%-7.57% and 1.75%-6.96% as of December 31, 2023 and 2024, respectively	47,165,065	1,438,398	49,900,124
Borrowings	47,444,862	1,446,931	50,254,188
Less: financial liabilities for hedging - current	12,456,104	379,875	12,516,971
Short-term borrowings	$ 34,988,758	$ 1,067,056	$ 37,737,217

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- Definition

Current financial liabilities for hedging.

+ References

No definition available.

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X

- Definition

The amount of outstanding funds that the entity is obligated to repay.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 55
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-URIDate 2024-03-27

+ Details

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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.

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- Definition

The amount of loans received from banks that have been secured by collateral. [Refer: Loans received]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2024-03-27

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- Definition

The amount of current borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard
-URIDate 2024-03-27

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- Definition

The amount of loans received from banks that have not been secured by collateral. [Refer: Loans received]

+ References

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-Number 1
-IssueDate 2024-01-01
-Paragraph 112
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-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard
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- Details

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