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Long-Term Bank Loans - Summary of Loans and Bonds Payable (Detail) $ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 TWD ($) | Dec. 31, 2021 TWD ($) | Dec. 31, 2022 USD ($)
Disclosure of detailed information about borrowings [line items] |  |  |
Less: Current portion | $ (18,100.0) | $ (4,400.0) |
Long-term bank loans | 4,760.0 | 3,309.1 | $ 154.9
Long-term bank loans [member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Unsecured loans | 6,013.3 | 3,510.0 |
Less: Discounts on government grants | (39.4) | (34.2) |
Less: Current portion | (1,213.9) | (166.7) |
Long-term bank loans | $ 4,760.0 | $ 3,309.1 |
Maturity date | December 2027 | September 2026 |
Long-term bank loans [member] | Bottom of range [member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Annual interest rate | 1.03% | 0.40% | 1.03%
Long-term bank loans [member] | Top of range [member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Annual interest rate | 1.23% | 0.90% | 1.23%

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