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Net Income - Additional Information (Detail) $ in Millions	12 Months Ended
Net Income - Additional Information (Detail) $ in Millions	Dec. 31, 2023 TWD ($)
Employee benefits expense [Line Items]
Employees' compensation payables	$ 1,522
Remuneration to directors payables	$ 40
Bottom of Range [Member]
Employee benefits expense [Line Items]
Employees' compensation distribution rate	1.70%
Top of Range [Member]
Employee benefits expense [Line Items]
Employees' compensation distribution rate	4.30%
Directors' remuneration distribution rate	0.17%