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Hedging Financial Instruments - Summary of hedging financial instruments (Detail) - TWD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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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 |

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