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Provisions - Summary of Provisions (Detail) $ in Millions, $ in Millions | Dec. 31, 2017 TWD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 TWD ($) | Dec. 31, 2015 TWD ($) | Dec. 31, 2014 TWD ($)
--- | --- | --- | --- | --- | ---
Provisions [Abstract] |  |  |  |  |
Warranties | $ 132 |  | $ 111 |  |
Trade-in right | 87 |  | 31 |  |
Employee benefits | 43 |  | 38 |  |
Others | 5 |  | 5 |  |
Provisions | 267 |  | 185 | $ 248 | $ 272
Current | 189 | $ 6 | 119 |  |
Noncurrent | $ 78 | $ 3 | $ 66 |  |

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- Definition Provisions for trade in right. + References No definition available. + Details
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- Definition The amount of current provisions. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 54 -Subparagraph l -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_54_l&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The amount of miscellaneous other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 78 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_78_d&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The amount of non-current provisions. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 54 -Subparagraph l -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_54_l&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The amount of liabilities of uncertain timing or the amount recognised when: (a) the entity has a present obligation (legal or constructive) as a result of a past event; (b) it is probable (ie more likely than not) that an outflow of resources embodying economic benefits will be required to settle the obligation; and (c) a reliable estimate can be made of the amount of the obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 54 -Subparagraph l -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_54_l&doctype=Standard -URIDate 2016-03-31 + Details
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- References No definition available. + Details
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- Definition The amount of provisions for employee benefits. [Refer: Employee benefits expense; Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 78 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_78_d&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The amount of provision for estimated costs of making good under warranties for products sold. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 37 -IssueDate 2016-01-13 -Section Example 1 Warranties -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2016-03-30&anchor=sect_Example1Warranties&doctype=Illustrative%20Examples -URIDate 2016-03-31 + Details
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