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Long-term Bank Loans - Summary of Long-term Bank Loans (Detail)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2023
TWD ($)
Dec. 31, 2022
TWD ($)
Dec. 31, 2023
USD ($)
Disclosure of detailed information about borrowings [Line Items]      
Bank loans $ 14,911,719 $ 13,967,801  
Less: Unamortized interest on government granted bank loans (60,592) (88,330)  
Less: Current portion (fee included) (2,263,718) (1,522,917) $ (73,930)
Syndicated bank loans, excluding current portion 12,648,001 12,444,884 $ 413,063
Long-term bank loans [Member]      
Disclosure of detailed information about borrowings [Line Items]      
Unused credit lines of long-term bank loans $ 7,232,770 $ 9,671,868  
Gross carrying amount [member] | Minimum [Member]      
Disclosure of detailed information about borrowings [Line Items]      
Interest rate range 1.20% 1.075% 1.20%
Gross carrying amount [member] | Maximum [Member]      
Disclosure of detailed information about borrowings [Line Items]      
Interest rate range 1.75% 1.625% 1.75%
Gross carrying amount [member] | Government granted bank loans from March 2020 To October 2032 [Member]      
Disclosure of detailed information about borrowings [Line Items]      
Bank loans $ 14,972,311 $ 14,056,131  
Period and payment term Borrowing period is from March 11, 2020 to October 15, 2032; interest is repayable monthly; principal is repayable monthly from March 15, 2023