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Contents of Significant Accounts - Intangible Assets (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 TWD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 TWD ($)
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | $ 4,372,555 |  |
Ending balance | 4,154,315 | $ 126,695 | $ 4,372,555
Net carrying amount: |  |  |
Intangible assets | 4,154,315 |  | 4,372,555
Cost [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | 10,565,271 |  | 12,061,215
Additions | 2,284,641 |  | 2,746,105
Write-off | (2,720,083) |  | (3,957,885)
Disposal of a subsidiary | (3,151) |  |
Reclassifications | 7,363 |  | (5,855)
Exchange effect | 351,221 |  | (278,309)
Ending balance | 10,485,262 |  | 10,565,271
Net carrying amount: |  |  |
Intangible assets | 10,485,262 |  | 10,565,271
Accumulated amortisation and impairment [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | (6,192,716) |  | (7,786,015)
Amortization | 2,636,538 |  | 2,555,610
Write-off | (2,720,083) |  | (3,957,885)
Disposal of a subsidiary | (2,025) |  |
Exchange effect | 223,801 |  | (191,024)
Ending balance | (6,330,947) |  | (6,192,716)
Net carrying amount: |  |  |
Intangible assets | (6,330,947) |  | (6,192,716)
Goodwill [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | 7,614 |  |
Ending balance | 7,614 |  | 7,614
Net carrying amount: |  |  |
Intangible assets | 7,614 |  | 7,614
Goodwill [member] | Cost [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | 15,012 |  | 15,012
Additions | 0 |  |
Write-off | 0 |  |
Reclassifications | 0 |  |
Exchange effect | 0 |  |
Ending balance | 15,012 |  | 15,012
Net carrying amount: |  |  |
Intangible assets | 15,012 |  | 15,012
Goodwill [member] | Accumulated amortisation and impairment [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | (7,398) |  | (7,398)
Amortization | 0 |  |
Write-off | 0 |  |
Exchange effect | 0 |  |
Ending balance | (7,398) |  | (7,398)
Net carrying amount: |  |  |
Intangible assets | (7,398) |  | (7,398)
Software [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | 2,575,246 |  |
Ending balance | 2,245,384 |  | 2,575,246
Net carrying amount: |  |  |
Intangible assets | 2,245,384 |  | 2,575,246
Software [member] | Cost [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | 5,466,077 |  | 5,669,787
Additions | 1,328,781 |  | 1,399,699
Write-off | (1,290,196) |  | (1,498,642)
Disposal of a subsidiary | (3,151) |  |
Reclassifications | 7,363 |  | (5,855)
Exchange effect | (32,375) |  | (98,912)
Ending balance | 5,476,499 |  | 5,466,077
Net carrying amount: |  |  |
Intangible assets | 5,476,499 |  | 5,466,077
Software [member] | Accumulated amortisation and impairment [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | (2,890,831) |  | (2,689,397)
Amortization | 1,656,180 |  | 1,741,898
Write-off | (1,290,196) |  | (1,498,642)
Disposal of a subsidiary | (2,025) |  |
Exchange effect | (23,675) |  | (41,822)
Ending balance | (3,231,115) |  | (2,890,831)
Net carrying amount: |  |  |
Intangible assets | (3,231,115) |  | (2,890,831)
Patent and technology license fee [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | 864,576 |  |
Ending balance | 879,682 |  | 864,576
Net carrying amount: |  |  |
Intangible assets | 879,682 |  | 864,576
Patent and technology license fee [member] | Cost [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | 1,773,541 |  | 3,422,432
Additions | 95,245 |  | 346,896
Write-off | (214,874) |  | (1,826,383)
Reclassifications | 0 |  |
Exchange effect | 388,567 |  | (169,404)
Ending balance | 2,042,479 |  | 1,773,541
Net carrying amount: |  |  |
Intangible assets | 2,042,479 |  | 1,773,541
Patent and technology license fee [member] | Accumulated amortisation and impairment [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | (908,965) |  | (2,597,513)
Amortization | 216,437 |  | 277,768
Write-off | (214,874) |  | (1,826,383)
Exchange effect | 252,269 |  | (139,933)
Ending balance | (1,162,797) |  | (908,965)
Net carrying amount: |  |  |
Intangible assets | (1,162,797) |  | (908,965)
Others [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | 925,119 |  |
Ending balance | 1,021,635 |  | 925,119
Net carrying amount: |  |  |
Intangible assets | 1,021,635 |  | 925,119
Others [member] | Cost [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | 3,310,641 |  | 2,953,984
Additions | 860,615 |  | 999,510
Write-off | (1,215,013) |  | (632,860)
Reclassifications | 0 |  |
Exchange effect | (4,971) |  | (9,993)
Ending balance | 2,951,272 |  | 3,310,641
Net carrying amount: |  |  |
Intangible assets | 2,951,272 |  | 3,310,641
Others [member] | Accumulated amortisation and impairment [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | (2,385,522) |  | (2,491,707)
Amortization | 763,921 |  | 535,944
Write-off | (1,215,013) |  | (632,860)
Exchange effect | (4,793) |  | (9,269)
Ending balance | (1,929,637) |  | (2,385,522)
Net carrying amount: |  |  |
Intangible assets | $ (1,929,637) |  | $ (2,385,522)

X
- Definition The amount of additions to intangible assets other than goodwill, other than those acquired through business combinations. [Refer: Total for all business combinations [member]; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2024-01-01 -Paragraph 118 -Subparagraph e -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118_e_i&doctype=Standard -URIDate 2024-03-27 + Details
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