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Financial Instruments - Summary of Categories of Financial Instruments (Detail) $ in Thousands, $ in Thousands | Dec. 31, 2021 TWD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 TWD ($)
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Disclosure of detailed information about financial instruments [line items] |  |  |
Mandatorily at FVTPL | $ 5,436,280 | $ 195,973 | $ 6,523,583
Measured at amortized cost (Note 1) | 200,732,680 | 7,236,218 | 147,521,583
Trade receivables, net | 115,462,210 | 4,162,300 | 91,833,989
Held for trading | 417,660 | 15,056 | 1,537,208
Financial liabilities for hedging | 11,497,896 | 414,488 | 11,188,244
Measured at amortized cost (Note 2) | 339,445,544 | 12,236,683 | 304,737,749
Financial assets at fair value through other comprehensive income, category [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Equity instruments | 943,354 | 34,007 | 728,398
Debt instruments | 1,076,458 | 38,805 | 1,012,736
Trade receivables, net | $ 6,092,462 | $ 219,627 | $ 626,413

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- Definition The amount of current financial liabilities at fair value through profit or loss that meet the definition of held for trading. [Refer: Current financial liabilities at fair value through profit or loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 8 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_8_e&doctype=Standard -URIDate 2021-03-24 + Details
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