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Financial Assets and Liabilities at Fair Value through Profit or Loss - Outstanding Forward Exchange Contracts for which Hedge Accounting Treatment is not Applied (Detail) ¥ in Millions, ¥ in Millions, $ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023 TWD ($)	Dec. 31, 2022 TWD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 JPY (¥)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 CNY (¥)
Sell NT$ [Member]
Disclosure of detailed information about financial instruments [line items]
Maturity Date	2024-01
Sell NT$ [Member] | Bottom of range [member]
Disclosure of detailed information about financial instruments [line items]
Maturity Date		2023-01
Sell NT$ [Member] | Top of range [member]
Disclosure of detailed information about financial instruments [line items]
Maturity Date		2023-03
Sell NT$ [Member] | Sell [member]
Disclosure of detailed information about financial instruments [line items]
Contract Amount | $	$ 26,251.8	$ 79,610.6
Sell US$ [Member] | Bottom of range [member]
Disclosure of detailed information about financial instruments [line items]
Maturity Date	2024-01	2023-01
Sell US$ [Member] | Top of range [member]
Disclosure of detailed information about financial instruments [line items]
Maturity Date	2024-03	2023-03
Sell US$ [Member] | Sell [member]
Disclosure of detailed information about financial instruments [line items]
Contract Amount | $			$ 1,112.0		$ 752.5
Sell RMB [Member] | Bottom of range [member]
Disclosure of detailed information about financial instruments [line items]
Maturity Date		2023-01
Sell RMB [Member] | Top of range [member]
Disclosure of detailed information about financial instruments [line items]
Maturity Date		2023-03
Sell RMB [Member] | Sell [member]
Disclosure of detailed information about financial instruments [line items]
Contract Amount | ¥						¥ 1,448.4
Sell JPY [Member]
Disclosure of detailed information about financial instruments [line items]
Maturity Date	2024-01
Sell JPY [Member] | Sell [member]
Disclosure of detailed information about financial instruments [line items]
Contract Amount | ¥				¥ 20,000.0

X

- Definition

The amount of contractual undiscounted cash flows in relation to contractual amounts to be exchanged in a derivative financial instrument for which gross cash flows are exchanged. [Refer: Derivatives [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 7
-IssueDate 2023-01-01
-Paragraph B11D
-Subparagraph d
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-URIDate 2023-03-23

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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

No definition available.

+ Details

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- Definition

Derivative maturity date month and year.

+ References

No definition available.

+ Details

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