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Financial Instruments at Fair Value Through Profit or Loss - Outstanding Forward Exchange Contracts Not Designated for Hedge (Detail) - Forward exchange contracts [Member] - EUR [Member] € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023 TWD ($)	Dec. 31, 2022 TWD ($)	Dec. 31, 2023 EUR (€)	Dec. 31, 2022 EUR (€)
Disclosure of detailed information about financial instruments [Line Items]
Currency	NT$/EUR	NT$/EUR
Maturity Period	March 2024	March 2023
Contract Amount	$ 145	$ 62	€ 4	€ 2

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- Definition

Derivative contract, cross currency.

+ References

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- Definition

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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.

+ References

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- Definition

The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 112
-Subparagraph c
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-URIDate 2023-03-23

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