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Share-Based Payment Arrangements - Summary of Fair Value of Compensation Costs (Detail)
 12 Months Ended
Dec. 31, 2024
TWD ($)
yr
Dec. 31, 2023
TWD ($)
yr
2021 Plan [member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Stock price at measurement date | $ $ 1,090 $ 593
Residual life 1  
Risk-free interest rate 1.37% 1.14%
2022 Plan [member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Stock price at measurement date | $ $ 1,090 $ 593
Risk-free interest rate 1.41% 1.15%
2023 Plan [Member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Stock price at measurement date | $ $ 1,090  
Risk-free interest rate 1.45%  
Bottom of range [member] | 2021 Plan [member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Expected price volatility 25.61% 24.76%
Residual life   1
Bottom of range [member] | 2022 Plan [member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Expected price volatility 25.61% 24.76%
Residual life 1 1
Bottom of range [member] | 2023 Plan [Member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Expected price volatility 25.61%  
Residual life 1  
Top of range [member] | 2021 Plan [member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Expected price volatility 30.78% 29.05%
Residual life   2
Top of range [member] | 2022 Plan [member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Expected price volatility 30.78% 29.05%
Residual life 2 3
Top of range [member] | 2023 Plan [Member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Expected price volatility 30.78%  
Residual life 3