Related Party Transactions - Compensation to Directors and Other Key Management Personnel (Detail) - TWD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| Disclosure of transactions between related parties [abstract] | |||
| Short-term employee benefits | $ 3,492.3 | $ 4,369.1 | $ 2,886.8 |
| Post-employment benefits | 3.9 | 3.0 | 2.9 |
| Share-based payments | 525.8 | 286.2 | |
| Compensation of key management personnel | $ 4,022.0 | $ 4,658.3 | $ 2,889.7 |