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Lease Arrangements - Summary of Right-of-Use Assets (Detail) $ in Thousands, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 TWD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 TWD ($) | Dec. 31, 2019 TWD ($) | Dec. 31, 2021 USD ($)
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |  |
Carrying amounts | $ 10,680,262 |  | $ 8,741,807 |  | $ 385,013
Additions to right-of-use assets | 3,239,770 | $ 116,791 | 702,996 | $ 824,268 |
Depreciation charge for right-of-use assets | 1,114,950 | 40,193 | 946,880 | 1,055,458 |
Land [member] |  |  |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |  |
Carrying amounts | 6,093,518 |  | 5,961,974 |  | 219,666
Depreciation charge for right-of-use assets | 509,746 | 18,376 | 370,458 | 307,708 |
Buildings and improvements [member] |  |  |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |  |
Carrying amounts | 3,663,682 |  | 2,548,838 |  | 132,072
Depreciation charge for right-of-use assets | 217,674 | 7,847 | 214,682 | 215,301 |
Machinery and equipment [member] |  |  |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |  |
Carrying amounts | 880,443 |  | 181,065 |  | 31,739
Depreciation charge for right-of-use assets | 356,052 | 12,835 | 335,039 | 507,443 |
Other equipment [member] |  |  |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |  |
Carrying amounts | 42,619 |  | 49,930 |  | $ 1,536
Depreciation charge for right-of-use assets | $ 31,478 | $ 1,135 | $ 26,701 | $ 25,006 |

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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 2021-01-01 -Paragraph 53 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2021-en-r&anchor=para_53_h&doctype=Standard -URIDate 2021-03-24 + 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 2021-01-01 -Paragraph 53 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2021-en-r&anchor=para_53_a&doctype=Standard -URIDate 2021-03-24 + 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 2021-01-01 -Paragraph 53 -Subparagraph j -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2021-en-r&anchor=para_53_j&doctype=Standard -URIDate 2021-03-24 + Details
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