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v3.22.1

Profit Before Income Tax - Summary of Depreciation and Amortization (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2021 TWD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 TWD ($) | Dec. 31, 2019 TWD ($)
Analysis of income and expense [Line Items] |  |  |  |
Property, plant and equipment depreciation | $ 48,604,160 | $ 1,752,133 | $ 46,016,548 | $ 45,240,667
Right-of-use assets | 1,114,950 | 40,193 | 946,880 | 1,055,458
Investment properties | 751,047 | 27,074 | 562,260 | 594,110
Intangible assets amortization | 4,054,120 | 146,147 | 3,733,377 | 3,576,606
Depreciation and amortization | 54,524,277 | 1,965,547 | 51,259,065 | 50,466,841
Depreciation expense | 50,470,157 | 1,819,400 | 47,525,688 | 46,890,235
Operating costs [member] |  |  |  |
Analysis of income and expense [Line Items] |  |  |  |
Intangible assets amortization | 2,443,870 | 88,099 | 2,231,060 | 2,092,074
Depreciation expense | 46,880,267 | 1,689,988 | 44,017,839 | 43,749,333
Operating expenses [member] |  |  |  |
Analysis of income and expense [Line Items] |  |  |  |
Intangible assets amortization | 1,610,250 | 58,048 | 1,502,317 | 1,484,532
Depreciation expense | $ 3,589,890 | $ 129,412 | $ 3,507,849 | $ 3,140,902

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- Definition The amount of depreciation and amortisation expense. Depreciation and amortisation are the systematic allocations of depreciable amounts of assets over their useful lives. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2021-01-01 -Paragraph 23 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2021-en-r&anchor=para_23_e&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2021-01-01 -Paragraph 28 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2021-en-r&anchor=para_28_e&doctype=Standard -URIDate 2021-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2021-01-01 -Paragraph B13 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2021-en-r&anchor=para_B13_d&doctype=Appendix&subtype=B -URIDate 2021-03-24 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 102 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_102&doctype=Standard -URIDate 2021-03-24 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 99 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_99&doctype=Standard -URIDate 2021-03-24 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 104 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_104&doctype=Standard -URIDate 2021-03-24 + Details
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