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Trade Receivables, Net - Summary of Loss Allowance of Trade Receivables Based on Group's Provision Matrix (Detail) - Trade receivables [member] $ in Thousands, $ in Thousands | Dec. 31, 2022 TWD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 TWD ($)
--- | --- | --- | ---
Disclosure of provision matrix [line items] |  |  |
Gross carrying amount | $ 109,408,693 | $ 3,560,322 | $ 109,473,101
Loss allowance (Lifetime ECL) | (164,408) | (5,350) | (103,353)
Net Amount | $ 109,244,285 | $ 3,554,972 | $ 109,369,748
Not past due [member] |  |  |
Disclosure of provision matrix [line items] |  |  |
Expected credit loss rate | 0.00% | 0.00% | 0.00%
Gross carrying amount | $ 102,857,157 | $ 3,347,125 | $ 105,538,390
Loss allowance (Lifetime ECL) | (20,445) | (665) | (18,062)
Net Amount | 102,836,712 | 3,346,460 | 105,520,328
Less than 1 month [member] |  |  |
Disclosure of provision matrix [line items] |  |  |
Gross carrying amount | 4,765,548 | 155,078 | 3,136,438
Loss allowance (Lifetime ECL) | (1,778) | (58) | (1,811)
Net Amount | $ 4,763,770 | $ 155,020 | $ 3,134,627
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 | $ 1,413,656 | $ 46,002 | $ 609,695
Loss allowance (Lifetime ECL) | (47,752) | (1,554) | (22,785)
Net Amount | $ 1,365,904 | $ 44,448 | $ 586,910
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 | $ 294,937 | $ 9,598 | $ 99,118
Loss allowance (Lifetime ECL) | (70,133) | (2,282) | (46,337)
Net Amount | $ 224,804 | $ 7,316 | $ 52,781
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 | $ 77,395 | $ 2,519 | $ 89,460
Loss allowance (Lifetime ECL) | (24,300) | (791) | (14,358)
Net Amount | $ 53,095 | $ 1,728 | $ 75,102
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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