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Share-Based Payment Arrangements - Summary of Granted RSAs (Detail) shares in Millions | 12 Months Ended
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Dec. 31, 2024 TWD ($) shares
2021 Restricted Stock Award [Member] |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Balance, beginning of year | 0.7
Issuance of stocks | 0.0
Canceled shares | (0.3)
Balance, end of year | 0.4
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 | 2.1
Issuance of stocks | 0.0
Canceled shares | (1.1)
Balance, end of year | 1.0
Weighted-average fair value of RSAs | $ | $ 277.71
2023 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 | 3.0
Canceled shares | 0.0
Balance, end of year | 3.0
Weighted-average fair value of RSAs | $ | $ 364.43
2024 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 | 2.3
Canceled shares | 0.0
Balance, end of year | 2.3
Weighted-average fair value of RSAs | $ | $ 662.42

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