v3.26.1
Significant Contingencies and Unrecognized Contract Commitments - Additional Information (Detail)
$ in Billions
Dec. 31, 2025
TWD ($)
Disclosure of contingent liabilities [line items]  
Amounts available under unused letters of credit $ 0.2
Customs tax and electricity supply guarantee 1.5
Patent license agreements and development contracts of intellectual property, contract amount 4.4
Royalties and development fees not yet recognized 1.4
Construction contracts, amount 24.2
Construction contracts not yet recognized $ 5.5