v3.26.1
Financial Instruments - Summary of Interest Rate Risk (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2025
TWD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
TWD ($)
Disclosure of detailed information about financial instruments [line items]      
Financial liabilities $ 396,607 $ 12,643  
Fair value interest rate risk [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets 53,381,124 1,701,662 $ 36,812,408
Financial liabilities 84,870,569 2,705,469 72,579,608
Cash flow interest rate risk [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets 45,958,834 1,465,057 46,378,904
Financial liabilities $ 229,257,842 $ 7,308,188 $ 151,248,418