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Other Current Monetary Assets - Summary of Other Current Monetary Assets (Detail) $ in Millions, $ in Millions | Dec. 31, 2020 TWD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 TWD ($)
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Disclosure Of Other Current Monetary Assets [Abstract] |  |  |
Time deposits and negotiable certificates of deposit with maturities of more than three months | $ 4,596 |  | $ 5,959
Repurchase agreements collateralized by bonds with maturities of more than three months | 0 |  | 15
Others | 1,528 |  | 1,524
Other current monetary assets | $ 6,124 | $ 218 | $ 7,498

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- Definition Miscellaneous other current monetary assets. + References No definition available. + Details
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- Definition Repurchase agreements collateralized by bonds with maturities. + References No definition available. + Details
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- Definition The amount of short-term deposits held by the entity that are not classified as cash equivalents. [Refer: Cash equivalents] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
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