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% |