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Equity - Schedule of appropriation of retained earnings (Detail) - TWD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Appropriation of earnings | $ 19,510,000 | $ 14,310,735
Dividends per share | $ 4.2 | $ 2.0
Legal reserve [member] |  |
Appropriation of earnings | $ 2,398,814 | $ 1,697,489
Special reserve [member] |  |
Appropriation of earnings | (1,278,670) | 3,944,915
Cash dividends [member] |  |
Appropriation of earnings | $ 18,389,856 | $ 8,668,331

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- Definition The amount of dividends paid per ordinary share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 34 -IssueDate 2021-01-01 -Paragraph 16A -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=34&code=ifrs-tx-2021-en-r&anchor=para_16A_f&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The increase (decrease) in equity resulting from the appropriation of retained earnings. [Refer: Retained earnings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 106 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_106_d&doctype=Standard -URIDate 2021-03-24 + Details
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- Details
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