Equity - Summary of Capital Stock (Detail) shares in Millions, $ in Millions, $ in Millions |
Dec. 31, 2023
TWD ($)
shares
|
Dec. 31, 2023
USD ($)
shares
|
Dec. 31, 2022
TWD ($)
shares
|
|---|---|---|---|
| Disclosure of classes of share capital [abstract] | |||
| Authorized shares | 28,050.0 | 28,050.0 | 28,050.0 |
| Authorized capital | $ | $ 280,500.0 | $ 280,500.0 | |
| Issued and paid shares | 25,932.1 | 25,932.1 | 25,930.3 |
| Issued capital | $ 259,320.7 | $ 8,469.0 | $ 259,303.8 |