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Trade Notes and Accounts Receivable, Net - Movements of Allowance for Doubtful Accounts, Trade Notes and Accounts Receivable (Detail) - TWD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure Of Financial Assets [Line Items] |  |  |
Beginning balance | $ (1,102) |  |
Add: Provision for credit loss | 179 | $ 128 | $ 109
Ending balance | (1,143) | (1,102) |
Trade notes and accounts receivable [Member] |  |  |
Disclosure Of Financial Assets [Line Items] |  |  |
Beginning balance | 1,102 | 1,365 |
Add: Provision for credit loss | 179 | 128 |
Less: Amounts written off | (138) | (391) |
Ending balance | $ 1,143 | $ 1,102 | $ 1,365

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- Definition The amount of impairment loss or reversal of impairment loss recognised in profit or loss for trade receivables. [Refer: Impairment loss recognised in profit or loss; Reversal of impairment loss recognised in profit or loss; Trade receivables] + 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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