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Long-Term Bank Loans - Summary of Loans and Bonds Payable (Detail) $ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 TWD ($) | Dec. 31, 2022 TWD ($) | Dec. 31, 2023 USD ($)
Disclosure of detailed information about borrowings [line items] |  |  |
Less: Current portion | $ (6,997.7) | $ (18,100.0) |
Long-term bank loans | 4,383.0 | 4,760.0 | $ 143.1
Long-term bank loans [member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Unsecured loans | 6,706.4 | 6,013.3 |
Less: Discounts on government grants | (27.8) | (39.4) |
Less: Current portion | (2,295.6) | (1,213.9) |
Long-term bank loans | $ 4,383.0 | $ 4,760.0 |
Maturity date | December 2027 | December 2027 |
Long-term bank loans [member] | Bottom of range [member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Annual interest rate | 1.15% | 1.03% | 1.15%
Long-term bank loans [member] | Top of range [member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Annual interest rate | 1.35% | 1.23% | 1.35%

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