Hedging Financial Instruments - Summary of hedging financial instruments (Detail) - TWD ($) $ in Millions |
Dec. 31, 2023 |
Dec. 31, 2022 |
|---|---|---|
| Financial liabilities- current | ||
| Financial liabilities current | $ 27,334.2 | $ 0.8 |
| Fair value hedges [member] | Interest rate futures contracts [member] | ||
| Financial assets- current | ||
| Financial assets current | 2.3 | |
| Financial liabilities- current | ||
| Financial liabilities current | 43.8 | $ 0.8 |
| Hedges of net investments in foreign operations [member] | Bank loans [member] | ||
| Financial liabilities- current | ||
| Financial liabilities current | $ 27,290.4 |