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Financial Risk and Fair Value Disclosures - Assets and Liabilities Not Recorded at Fair Value on a Recurring Basis But for Which Fair Value is Disclosed (Detail) - TWD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of fair value measurement of liabilities [line items] |  |
Bonds payables (current portion included) | $ 30,051,568 | $ 38,359,352
Long-term loans (current portion included) | 36,476,909 | 22,883,344
Not measured at fair value in statement of financial position but for which fair value is disclosed [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Bonds payables (current portion included) | 30,020,005 | 38,367,168
Long-term loans (current portion included) | 36,476,909 | 22,883,344
Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Level 1 [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Bonds payables (current portion included) | 24,409,952 | 32,827,211
Long-term loans (current portion included) | 0 | 0
Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Level 2 [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Bonds payables (current portion included) | 5,610,053 | 5,539,957
Long-term loans (current portion included) | 36,476,909 | 22,883,344
Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Level 3 [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Bonds payables (current portion included) | 0 | 0
Long-term loans (current portion included) | $ 0 | $ 0

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- Definition The amount of bonds issued by the entity. + 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 + Details
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- Definition The amount of 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 + Details
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