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Prepayments - Summary of Prepayments (Detail) $ in Millions, $ in Millions | Dec. 31, 2019 TWD ($) | Dec. 31, 2019 USD ($) | Jan. 01, 2019 TWD ($) | Dec. 31, 2018 TWD ($)
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Prepayments [Abstract] |  |  |  |
Prepaid rents | $ 3,382 |  |  | $ 2,415
Others | 1,180 |  |  | 2,921
Prepayments | 4,562 |  |  | 5,336
Prepaid rents | 704 |  |  | 600
Others | 1,179 |  |  | 1,273
Current prepayments | 1,883 | $ 63 | $ 1,628 | 1,873
Prepaid rents | 2,678 |  |  | 1,815
Others | 1 |  |  | 1,648
Noncurrent prepayments | $ 2,679 | $ 90 | $ 3,049 | $ 3,463

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- Definition Non-current prepaid rents. + References No definition available. + Details
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- Definition Other current prepayments. + References No definition available. + Details
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- Definition Other non-current prepayments. + References No definition available. + Details
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- Definition Other prepayments. + References No definition available. + Details
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- Definition Prepaid rents. + References No definition available. + Details
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- Definition Prepayments. + References No definition available. + Details
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- Definition The amount of current prepayments. [Refer: Prepayments] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 78 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_78_b&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of non-current prepayments. [Refer: Prepayments] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 78 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_78_b&doctype=Standard -URIDate 2019-03-27 + Details
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