Operating Segments Information - Major Customers Representing at Least 10 Percent of Net Revenue (Detail) $ in Millions, $ in Millions	12 Months Ended
Dec. 31, 2023 TWD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 TWD ($)	Dec. 31, 2021 TWD ($)
Disclosure of major customers [line items]
NET REVENUE	$ 2,161,735.8	$ 70,598.8	$ 2,263,891.3	$ 1,587,415.0
Customer A [member]
Disclosure of major customers [line items]
NET REVENUE	$ 546,550.9		$ 529,649.2	$ 405,403.0
Percentage of entity's revenue	25.00%	25.00%	23.00%	26.00%
Customer B [member]
Disclosure of major customers [line items]
NET REVENUE	$ 241,152.4			$ 153,740.8
Percentage of entity's revenue	11.00%	11.00%		10.00%

The income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims.

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+ Details