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Contents of Significant Accounts - Intangible Assets (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 TWD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 TWD ($)
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | $ 4,275,200 |  |
Ending balance | 4,372,555 | $ 142,801 | $ 4,275,200
Net carrying amount: |  |  |
Intangible assets | 4,372,555 |  | 4,275,200
Cost [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | 12,061,215 |  | 12,699,284
Additions | 2,746,105 |  | 3,194,414
Write-off | (3,957,885) |  | (4,071,911)
Reclassifications | (5,855) |  | (10,721)
Exchange effect | (278,309) |  | 250,149
Ending balance | 10,565,271 |  | 12,061,215
Net carrying amount: |  |  |
Intangible assets | 10,565,271 |  | 12,061,215
Accumulated amortisation and impairment [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | (7,786,015) |  | (9,054,351)
Amortization | 2,555,610 |  | 2,689,600
Write-off | (3,957,885) |  | (4,071,911)
Exchange effect | (191,024) |  | 113,975
Ending balance | (6,192,716) |  | (7,786,015)
Net carrying amount: |  |  |
Intangible assets | (6,192,716) |  | (7,786,015)
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 | 2,980,390 |  |
Ending balance | 2,575,246 |  | 2,980,390
Net carrying amount: |  |  |
Intangible assets | 2,575,246 |  | 2,980,390
Software [member] | Cost [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | 5,669,787 |  | 4,845,037
Additions | 1,399,699 |  | 2,713,534
Write-off | (1,498,642) |  | (1,857,289)
Reclassifications | (5,855) |  | (10,721)
Exchange effect | (98,912) |  | (20,774)
Ending balance | 5,466,077 |  | 5,669,787
Net carrying amount: |  |  |
Intangible assets | 5,466,077 |  | 5,669,787
Software [member] | Accumulated amortisation and impairment [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | (2,689,397) |  | (2,913,824)
Amortization | 1,741,898 |  | 1,656,765
Write-off | (1,498,642) |  | (1,857,289)
Exchange effect | (41,822) |  | (23,903)
Ending balance | (2,890,831) |  | (2,689,397)
Net carrying amount: |  |  |
Intangible assets | (2,890,831) |  | (2,689,397)
Patent and technology license fee [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | 824,919 |  |
Ending balance | 864,576 |  | 824,919
Net carrying amount: |  |  |
Intangible assets | 864,576 |  | 824,919
Patent and technology license fee [member] | Cost [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | 3,422,432 |  | 4,491,164
Additions | 346,896 |  | 0
Write-off | (1,826,383) |  | (1,344,682)
Reclassifications | 0 |  |
Exchange effect | (169,404) |  | 275,950
Ending balance | 1,773,541 |  | 3,422,432
Net carrying amount: |  |  |
Intangible assets | 1,773,541 |  | 3,422,432
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 | (2,597,513) |  | (3,324,667)
Amortization | 277,768 |  | 475,870
Write-off | (1,826,383) |  | (1,344,682)
Exchange effect | (139,933) |  | 141,658
Ending balance | (908,965) |  | (2,597,513)
Net carrying amount: |  |  |
Intangible assets | (908,965) |  | (2,597,513)
Others [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | 462,277 |  |
Ending balance | 925,119 |  | 462,277
Net carrying amount: |  |  |
Intangible assets | 925,119 |  | 462,277
Others [member] | Cost [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | 2,953,984 |  | 3,348,071
Additions | 999,510 |  | 480,880
Write-off | (632,860) |  | (869,940)
Reclassifications | 0 |  |
Exchange effect | (9,993) |  | (5,027)
Ending balance | 3,310,641 |  | 2,953,984
Net carrying amount: |  |  |
Intangible assets | 3,310,641 |  | 2,953,984
Others [member] | Accumulated amortisation and impairment [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Beginning balance | (2,491,707) |  | (2,808,462)
Amortization | 535,944 |  | 556,965
Write-off | (632,860) |  | (869,940)
Exchange effect | (9,269) |  | (3,780)
Ending balance | (2,385,522) |  | (2,491,707)
Net carrying amount: |  |  |
Intangible assets | $ (2,385,522) |  | $ (2,491,707)

X
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