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Financial Assets at Fair Value through Other Comprehensive Income Noncurrent - Summary of Financial Assets at Fair Value through Other Comprehensive Income Noncurrent (Detail) $ in Millions, $ in Millions | Dec. 31, 2024 TWD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 TWD ($)
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Disclosure of financial assets [Line Items] |  |  |
Financial assets at fair value through other comprehensive income | $ 4,667 | $ 142 | $ 4,412
Domestic listed stocks [Member] |  |  |
Disclosure of financial assets [Line Items] |  |  |
Financial assets at fair value through other comprehensive income | 126 |  | 243
Domestic non-listed stocks [Member] |  |  |
Disclosure of financial assets [Line Items] |  |  |
Financial assets at fair value through other comprehensive income | 3,874 |  | 3,734
Foreign non-listed stocks [Member] |  |  |
Disclosure of financial assets [Line Items] |  |  |
Financial assets at fair value through other comprehensive income | $ 667 |  | $ 435

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- Definition Noncurrent financial assets at fair value through other comprehensive income. + References No definition available. + Details
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- Definition The amount of non-current financial assets at fair value through other comprehensive income. [Refer: Financial assets at fair value through other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 8 -Subparagraph h -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_8_h&doctype=Standard -URIDate 2024-03-27 + Details
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