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Financial Instruments - Summary of Detailed Information about Maturity Analysis of Obligation under Leases (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2024
TWD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
TWD ($)
Less than 1 year [member] | Obligation under leases [member]      
Disclosure of maturity analysis for non-derivative financial liabilities [line items]      
Non-derivative financial liabilities undiscounted amounts $ 1,154,737 $ 35,216 $ 1,227,705
1-5 years [member]      
Disclosure of maturity analysis for non-derivative financial liabilities [line items]      
Non-derivative financial liabilities undiscounted amounts 146,133,980 4,456,663 106,829,736
1-5 years [member] | Obligation under leases [member]      
Disclosure of maturity analysis for non-derivative financial liabilities [line items]      
Non-derivative financial liabilities undiscounted amounts 2,676,514 81,626 2,867,502
5 to 10 Years [member] | Obligation under leases [member]      
Disclosure of maturity analysis for non-derivative financial liabilities [line items]      
Non-derivative financial liabilities undiscounted amounts 1,964,781 59,920 2,157,503
10 to 15 Years [member] | Obligation under leases [member]      
Disclosure of maturity analysis for non-derivative financial liabilities [line items]      
Non-derivative financial liabilities undiscounted amounts 951,983 29,033 891,614
15 to 20 Years [member] | Obligation under leases [member]      
Disclosure of maturity analysis for non-derivative financial liabilities [line items]      
Non-derivative financial liabilities undiscounted amounts 917,034 27,967 864,881
More than 20 Years [member] | Obligation under leases [member]      
Disclosure of maturity analysis for non-derivative financial liabilities [line items]      
Non-derivative financial liabilities undiscounted amounts $ 1,738,240 $ 53,011 $ 1,591,097