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Lease Arrangements - Summary of Right-of-Use&#160;Assets (Detail) $ in Thousands, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 TWD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 TWD ($) | Dec. 31, 2017 TWD ($) | Dec. 31, 2019 USD ($)
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |  |
Carrying amounts | $ 9,792,221 |  |  |  | $ 327,390
Additions to right-of-use assets | 824,268 | $ 27,558 |  |  |
Depreciation charge for right-of-use assets | 1,055,458 | 35,288 | $ 0 | $ 0 |
Land [member] |  |  |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |  |
Carrying amounts | 7,036,887 |  |  |  | 235,269
Depreciation charge for right-of-use assets | 215,301 | 7,198 |  |  |
Buildings and improvements [member] |  |  |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |  |
Carrying amounts | 2,121,797 |  |  |  | 70,939
Depreciation charge for right-of-use assets | 307,708 | 10,288 |  |  |
Machinery and equipment [member] |  |  |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |  |
Carrying amounts | 588,443 |  |  |  | 19,674
Depreciation charge for right-of-use assets | 507,443 | 16,966 |  |  |
Other equipment [member] |  |  |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |  |
Carrying amounts | 45,094 |  |  |  | $ 1,508
Depreciation charge for right-of-use assets | $ 25,006 | $ 836 |  |  |

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- Definition The amount of additions to right-of-use assets. [Refer: Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 53 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53_h&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 53 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53_a&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 53 -Subparagraph j -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53_j&doctype=Standard -URIDate 2019-03-27 + Details
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- Details
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