Borrowings - Summary of Short Term Borrowings (Detail) $ in Thousands, $ in Thousands |
Dec. 31, 2025
TWD ($)
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
TWD ($)
|
|---|---|---|---|
| Disclosure of detailed information about borrowings [line items] | |||
| Less: financial liabilities for hedging - current | $ 9,282,400 | $ 295,901 | $ 12,456,104 |
| Short-term borrowings | 31,825,453 | 1,014,519 | 34,988,758 |
| Short Term Bank Loans [Member] | |||
| Disclosure of detailed information about borrowings [line items] | |||
| Secured bank loans, annual interest rates were 3.81%-4.16% and 2.82%-3.48% as of December 31, 2024 and 2025, respectively | 86,116 | 2,746 | 279,797 |
| Unsecured bank loans, annual interest rates were 1.75%-6.96% and 1.70%-5.72% as of December 31, 2024 and 2025, respectively | 41,021,737 | 1,307,674 | 47,165,065 |
| Borrowings | 41,107,853 | 1,310,420 | 47,444,862 |
| Less: financial liabilities for hedging - current | 9,282,400 | 295,901 | 12,456,104 |
| Short-term borrowings | $ 31,825,453 | $ 1,014,519 | $ 34,988,758 |