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Contents of Significant Accounts - Short-Term Loans (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2023
TWD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
TWD ($)
Disclosure of detailed information about borrowings [line items]      
Short-term loans $ 13,530,000 $ 441,868 $ 0
Interest rates applied     0.00%
Bottom of range [member]      
Disclosure of detailed information about borrowings [line items]      
Interest rates applied 1.69% 1.69%  
Top of range [member]      
Disclosure of detailed information about borrowings [line items]      
Interest rates applied 2.65% 2.65%  
Unsecured bank loans [member]      
Disclosure of detailed information about borrowings [line items]      
Short-term loans $ 13,530,000   $ 0