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Significant Related Party Transactions - Significant Transactions between Company and Other Related Parties (Detail) ¥ in Thousands, shares in Thousands, $ in Thousands, $ in Thousands | 12 Months Ended |
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Dec. 31, 2023 TWD ($) shares | Dec. 31, 2023 USD ($) shares | Dec. 31, 2022 TWD ($) | Dec. 31, 2021 TWD ($) shares | Dec. 31, 2023 USD ($) | Dec. 31, 2023 CNY (¥)
Disclosure of transactions between related parties [line items] |  |  |  |  |  |
Accounts receivable-related parties, net | $ 347,964 |  | $ 530,577 |  | $ 11,364 |
Acquisition of financial assets at fair value through profit or loss – noncurrent, Purchase price | 16,694,860 |  | 17,784,651 |  | 545,227 |
Acquisition of investments accounted for under the equity method, Purchase price | 32,785,800 |  | 26,504,913 |  | $ 1,070,731 |
Acquisition of intangible assets | 2,546,516 | $ 83,165 | 2,756,155 | $ 1,924,924 |  |
Trading Capital Amount | ¥ |  |  |  |  |  | ¥ 4,416,624
Purchase price | 21,209,443 |  |  |  |  |
FARADAY TECHNOLOGY CORP. [member] |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |
Acquisition of investments accounted for under the equity method, Purchase price | 1,990,073 |  | 1,862,245 |  |  |
Acquisition of intangible assets | 323,551 |  | 266,053 | 181,254 |  |
ARTERY TECHNOLOGY CORPORATION, LTD. [member] |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |
Accounts receivable-related parties, net | 40,886 |  | 56,864 |  |  |
FARADAY TECHNOLOGY CORP. [member] |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |
Accounts receivable-related parties, net | 302,828 |  | 441,963 |  |  |
Associates [member] |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |
Operating revenues | 3,018,171 |  | 5,744,098 | 2,778,544 |  |
Refund liability, classified under other current liabilities | 636 |  | 1,545 |  |  |
Associates [member] | Stock of Artery Technology Corporation [Member] |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |
Acquisition of financial assets at fair value through profit or loss – noncurrent, Purchase price |  |  |  | $ 13,929 |  |
Acquisition of shares, noncurrent financial assets at fair value through profit or loss, Trading Volume | shares |  |  |  | 82 |  |
Associates [member] | Stock Of UNIMICRON [member] |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |
Acquisition of investments accounted for under the equity method, Purchase price | $ 608,224 |  |  |  |  |
Acquisition of investments accounted for under the equity method, Trading Volume | shares | 4,945 | 4,945 |  |  |  |
Other related party [member] |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |
Operating revenues | $ 4,463 |  | 40,474 | $ 38,797 |  |
Accounts receivable-related parties, net | 0 |  | 1,052 |  |  |
Refund liability, classified under other current liabilities | 0 |  | 7 |  |  |
Mask expenditure | 2,375,225 |  | 2,581,409 | 1,861,438 |  |
Other payables of mask expenditure | 751,763 |  | 812,185 | 560,042 |  |
All other related parties [member] |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |
Operating revenues | 3,022,634 |  | 5,784,572 | $ 2,817,341 |  |
Refund liability, classified under other current liabilities | 636 |  | 1,552 |  |  |
Others [member] |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |
Accounts receivable-related parties, net | 3,602 |  | 30,698 |  |  |
Other Associates [member] |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |
Accounts receivable-related parties, net | 648 |  | $ 0 |  |  |
XIAMEN JINYUAN INDUSTRIAL DEVELOPMENT CO., LTD. [member] | Increase of ownership stake in the subsidiary company USCXM [member] |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |
Trading Capital Amount | ¥ |  |  |  |  |  | 3,741,862
Purchase price | 17,945,970 |  |  |  |  |
FUJIAN ELECTRONICS & INFORMATION INDUSTRY ENTREPRENEURSHIP INVESTMENT LIMITED PARTNERSHIP [member] | Increase of ownership stake in the subsidiary company USCXM [member] |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |
Trading Capital Amount | ¥ |  |  |  |  |  | ¥ 674,762
Purchase price | $ 3,263,473 |  |  |  |  |

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