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Operating Segments Information - Major Customers Representing at Least 10 Percent of Net Revenue (Detail) $ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024 TWD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 TWD ($)	Dec. 31, 2022 TWD ($)
Disclosure of major customers [line items]
NET REVENUE	$ 2,894,307.7	$ 88,268.0	$ 2,161,735.8	$ 2,263,891.3
Customer A [member]
Disclosure of major customers [line items]
NET REVENUE	$ 624,345.5		$ 546,550.9	$ 529,649.2
Percentage of entity's revenue	22.00%	22.00%	25.00%	23.00%
Customer B [member]
Disclosure of major customers [line items]
NET REVENUE	$ 352,271.2
Percentage of entity's revenue	12.00%	12.00%
Customer C [Member]
Disclosure of major customers [line items]
NET REVENUE			$ 241,152.4
Percentage of entity's revenue			11.00%

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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The percentage of the entity's revenue. [Refer: Revenue]

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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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