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Trade Receivables, Net - Summary of Loss Allowance For Current Financial Assets At FVTOCI (Detail) $ in Thousands, $ in Thousands | Dec. 31, 2024 TWD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 TWD ($)
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Disclosure For Loss Allowance For Current Financial Assets At FVTOCI [Line Items] |  |  |
Net Amount | $ 6,532,508 | $ 199,222 | $ 5,637,485
Trade receivables [member] |  |  |
Disclosure For Loss Allowance For Current Financial Assets At FVTOCI [Line Items] |  |  |
Gross carrying amount | 6,532,508 | 199,222 | 5,637,485
Loss allowance (Lifetime ECLs) | 0 | 0 | 0
Net Amount | $ 6,532,508 | $ 199,222 | $ 5,637,485
Not past due [member] | Trade receivables [member] |  |  |
Disclosure For Loss Allowance For Current Financial Assets At FVTOCI [Line Items] |  |  |
Expected credit loss rate | 0.00% | 0.00% | 0.00%
Gross carrying amount | $ 6,407,425 | $ 195,408 | $ 5,548,363
Loss allowance (Lifetime ECLs) | 0 | 0 | 0
Net Amount | $ 6,407,425 | $ 195,408 | $ 5,548,363
Less than 1 month [member] | Trade receivables [member] |  |  |
Disclosure For Loss Allowance For Current Financial Assets At FVTOCI [Line Items] |  |  |
Expected credit loss rate | 0.00% | 0.00% | 0.00%
Gross carrying amount | $ 5,549 | $ 169 | $ 5
Loss allowance (Lifetime ECLs) | 0 | 0 | 0
Net Amount | $ 5,549 | $ 169 | $ 5
1 to 3 months [member] | Trade receivables [member] |  |  |
Disclosure For Loss Allowance For Current Financial Assets At FVTOCI [Line Items] |  |  |
Expected credit loss rate | 0.00% | 0.00% | 0.00%
Gross carrying amount | $ 106,134 | $ 3,237 | $ 76,717
Loss allowance (Lifetime ECLs) | 0 | 0 | 0
Net Amount | $ 106,134 | $ 3,237 | $ 76,717
More than 91 days [member] | Trade receivables [member] |  |  |
Disclosure For Loss Allowance For Current Financial Assets At FVTOCI [Line Items] |  |  |
Expected credit loss rate | 0.00% | 0.00% | 0.00%
Gross carrying amount | $ 13,400 | $ 408 | $ 12,400
Loss allowance (Lifetime ECLs) | 0 | 0 | 0
Net Amount | $ 13,400 | $ 408 | $ 12,400

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