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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
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