Share-Based Payment Arrangements - Summary of Granted 2021 RSAs (Detail) shares in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2023
TWD ($)
shares
| |
| 2021 Restricted Stock Award [Member] | |
| Disclosure of terms and conditions of share-based payment arrangement [line items] | |
| Balance, beginning of year | 1.4 |
| Issuance of stocks | 0.0 |
| Vested shares | (0.3) |
| Canceled shares | (0.4) |
| Balance, end of year | 0.7 |
| Weighted-average fair value of RSAs | $ | $ 325.81 |
| 2022 Restricted Stock Award [Member] | |
| Disclosure of terms and conditions of share-based payment arrangement [line items] | |
| Balance, beginning of year | 0.0 |
| Issuance of stocks | 2.1 |
| Balance, end of year | 2.1 |
| Weighted-average fair value of RSAs | $ | $ 277.71 |