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Equity - Summary of Capital Surplus (Detail) $ in Millions, $ in Millions | Dec. 31, 2024 TWD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 TWD ($)
--- | --- | --- | ---
Equity [abstract] |  |  |
Additional paid-in capital | $ 24,809.7 |  | $ 24,406.8
From merger | 22,800.4 |  | 22,803.3
From convertible bonds | 8,891.3 |  | 8,892.4
From difference between the consideration received and the carrying amount of the subsidiaries' net assets during actual disposal | 8,411.6 |  | 8,406.3
Donations - donated by shareholders | 11.3 |  | 11.3
From share of changes in equities of subsidiaries | 4,108.9 |  | 4,199.9
From share of changes in equities of associates | 1,172.4 |  | 302.4
Donations - unclaimed dividend | 79.0 |  | 70.1
Employee restricted shares | 2,976.2 |  | 783.9
Total | $ 73,260.8 | $ 2,234.2 | $ 69,876.4

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- Definition The amount received or receivable from the issuance of the entity's shares in excess of nominal value and amounts received from other transactions involving the entity's stock or stockholders. + 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 + Details
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- Definition A component of equity that may result in relation to a business combination outside the scope of IFRS 3. + 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 + Details
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