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Provisions - Movements in Provisions (Detail) - TWD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of other provisions [Line Items] |  |  |
Beginning balance | $ 822 | $ 399 | $ 427
Additional/(reversal of) provisions recognized | 231 | 440 | 58
Used / forfeited during the year | (76) | (67) | (86)
Reclassification |  | 50 |
Effect of foreign exchange differences | 0 | 0 | 0
Ending balance | 977 | 822 | 399
Employee benefits [Member] |  |  |
Disclosure of other provisions [Line Items] |  |  |
Beginning balance | 387 | 65 | 63
Additional/(reversal of) provisions recognized | 34 | 323 | 2
Used / forfeited during the year | (5) | (1) | 0
Reclassification |  | 0 |
Effect of foreign exchange differences | 0 | 0 | 0
Ending balance | 416 | 387 | 65
Warranties [Member] |  |  |
Disclosure of other provisions [Line Items] |  |  |
Beginning balance | 238 | 235 | 213
Additional/(reversal of) provisions recognized | 114 | 69 | 108
Used / forfeited during the year | (71) | (66) | (86)
Reclassification |  | 0 |
Effect of foreign exchange differences | 0 | 0 | 0
Ending balance | 281 | 238 | 235
Onerous Contracts [Member] |  |  |
Disclosure of other provisions [Line Items] |  |  |
Beginning balance | 194 | 95 | 147
Additional/(reversal of) provisions recognized | 72 | 49 | (52)
Used / forfeited during the year | 0 | 0 | 0
Reclassification |  | 50 |
Effect of foreign exchange differences | 0 | 0 | 0
Ending balance | 266 | 194 | 95
Others [Member] |  |  |
Disclosure of other provisions [Line Items] |  |  |
Beginning balance | 3 | 4 | 4
Additional/(reversal of) provisions recognized | 11 | (1) | 0
Used / forfeited during the year | 0 | 0 | 0
Reclassification |  | 0 |
Effect of foreign exchange differences | 0 | 0 | 0
Ending balance | $ 14 | $ 3 | $ 4

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- Definition Additional or reversal of provisions recognized. + References No definition available. + Details
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- Definition Provisions used. + References No definition available. + Details
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- Definition Reclassification of provision. + References No definition available. + Details
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- Definition Adjustments for unrealised foreign exchange losses (gains) to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Profit (loss)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2024-01-01 -Paragraph 20 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_20_b&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2024-01-01 -Section A Statement of cash flows for an entity other than a financial institution -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&doctype=Illustrative%20Examples&dita_xref=IAS07_IE_A_TI -URIDate 2024-03-27 + Details
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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. + Details
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- Definition The amount of liabilities of uncertain timing or amount, including provisions for employee benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 54 -Subparagraph l -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_l&doctype=Standard -URIDate 2024-03-27 + Details
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- Details
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- Details
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- Details
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