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Non-Cash Transactions - Non-cash Investing Activities (Detail) - TWD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Noncash Investing Activities [Abstract] |  |  |
Increase in property, plant and equipment | $ 23,164 | $ 27,979 | $ 26,069
Other payables | 1,002 | 571 | 806
Non-cash investing activities | $ 24,166 | $ 28,550 | $ 26,875

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- Definition Non-cash investing activities. + References No definition available. + Details
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- Definition Non-cash investing activities. + References No definition available. + Details
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- Definition Non-cash transactions other payables. + References No definition available. + Details
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- Definition The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2019-01-01 -Paragraph 73 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_73_e_i&doctype=Standard -URIDate 2019-03-27 + Details
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