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Financial Assets at Fair Value through Other Comprehensive Income Noncurrent - Summary of Financial Assets at Fair Value through Other Comprehensive Income Noncurrent (Detail)
$ in Millions, $ in Millions
Dec. 31, 2023
TWD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
TWD ($)
Disclosure of financial assets [Line Items]      
Financial assets at fair value through other comprehensive income $ 4,412 $ 144 $ 3,491
Domestic listed stocks [Member]      
Disclosure of financial assets [Line Items]      
Financial assets at fair value through other comprehensive income 243   273
Domestic non-listed stocks [Member]      
Disclosure of financial assets [Line Items]      
Financial assets at fair value through other comprehensive income 3,734   3,084
Foreign non-listed stocks [Member]      
Disclosure of financial assets [Line Items]      
Financial assets at fair value through other comprehensive income $ 435   $ 134