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Trade Receivables, Net - Summary of Loss Allowance of Trade Receivables Based on Group's Provision Matrix (Detail) - Classes of financial assets [domain] $ in Thousands, $ in Thousands | Dec. 31, 2024 TWD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 TWD ($)
--- | --- | --- | ---
Disclosure of provision matrix [line items] |  |  |
Gross carrying amount | $ 107,294,445 | $ 3,272,170 | $ 94,232,032
Loss allowance (Lifetime ECLs) | (407,133) | (12,416) | (332,756)
Net Amount | $ 106,887,312 | $ 3,259,754 | $ 93,899,276
Not past due [member] |  |  |
Disclosure of provision matrix [line items] |  |  |
Expected credit loss rate | 0.00% | 0.00% | 0.00%
Gross carrying amount | $ 98,650,390 | $ 3,008,551 | $ 87,272,289
Loss allowance (Lifetime ECLs) | (31,490) | (960) | (11,118)
Net Amount | 98,618,900 | 3,007,591 | 87,261,171
Less than 1 month [member] |  |  |
Disclosure of provision matrix [line items] |  |  |
Gross carrying amount | 6,644,672 | 202,643 | 4,915,827
Loss allowance (Lifetime ECLs) | (4,262) | (130) | (1,521)
Net Amount | $ 6,640,410 | $ 202,513 | $ 4,914,306
Less than 1 month [member] | Bottom of range [member] |  |  |
Disclosure of provision matrix [line items] |  |  |
Expected credit loss rate | 0.00% | 0.00% | 0.00%
Less than 1 month [member] | Top of range [member] |  |  |
Disclosure of provision matrix [line items] |  |  |
Expected credit loss rate | 10.00% | 10.00% | 10.00%
1 to 3 months [member] |  |  |
Disclosure of provision matrix [line items] |  |  |
Gross carrying amount | $ 1,431,402 | $ 43,654 | $ 1,334,335
Loss allowance (Lifetime ECLs) | (57,708) | (1,760) | (17,260)
Net Amount | $ 1,373,694 | $ 41,894 | $ 1,317,075
1 to 3 months [member] | Bottom of range [member] |  |  |
Disclosure of provision matrix [line items] |  |  |
Expected credit loss rate | 0.00% | 0.00% | 0.00%
1 to 3 months [member] | Top of range [member] |  |  |
Disclosure of provision matrix [line items] |  |  |
Expected credit loss rate | 70.00% | 70.00% | 70.00%
More than 91 days [member] |  |  |
Disclosure of provision matrix [line items] |  |  |
Gross carrying amount | $ 472,061 | $ 14,397 | $ 251,769
Loss allowance (Lifetime ECLs) | (229,042) | (6,985) | (131,650)
Net Amount | $ 243,019 | $ 7,412 | $ 120,119
More than 91 days [member] | Bottom of range [member] |  |  |
Disclosure of provision matrix [line items] |  |  |
Expected credit loss rate | 1.00% | 1.00% | 1.00%
More than 91 days [member] | Top of range [member] |  |  |
Disclosure of provision matrix [line items] |  |  |
Expected credit loss rate | 100.00% | 100.00% | 100.00%
Individually impaired [member] |  |  |
Disclosure of provision matrix [line items] |  |  |
Gross carrying amount | $ 95,920 | $ 2,925 | $ 457,812
Loss allowance (Lifetime ECLs) | (84,631) | (2,581) | (171,207)
Net Amount | $ 11,289 | $ 344 | $ 286,605
Individually impaired [member] | Bottom of range [member] |  |  |
Disclosure of provision matrix [line items] |  |  |
Expected credit loss rate | 0.00% | 0.00% | 0.00%
Individually impaired [member] | Top of range [member] |  |  |
Disclosure of provision matrix [line items] |  |  |
Expected credit loss rate | 100.00% | 100.00% | 100.00%

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