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Financial Instruments - Categories of Financial Instruments (Detail)
$ in Millions, $ in Millions
Dec. 31, 2024
TWD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
TWD ($)
Financial assets      
Mandatorily measured at FVTPL $ 1,005   $ 1,037
Hedging financial assets 1 $ 0 0
Financial assets at amortized cost (Note a) 91,049   82,091
Financial assets at FVOCI 4,667   4,412
Financial liabilities      
Hedging financial liabilities 2   0
Financial liabilities at amortized cost (Note b) $ 69,231   $ 65,466