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Financial Instruments - Categories of Financial Instruments (Detail)
$ in Millions, $ in Millions
Dec. 31, 2023
TWD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
TWD ($)
Financial assets      
Mandatorily measured at FVTPL $ 1,037   $ 1,024
Hedging financial assets 0 $ 0 13
Financial assets at amortized cost (Note a) 82,091   81,523
Financial assets at FVOCI 4,412   3,491
Financial liabilities      
Hedging financial liabilities 0   0
Measured at amortized cost (Note b) $ 65,466   $ 67,451