Share-Based Payment Arrangements - Summary of RSAs Measured at Fair Value at Grant Date (Detail) - Restricted Stock Award [Member] $ in Millions	Mar. 01, 2022 TWD ($) yr
Disclosure of terms and conditions of share-based payment arrangement [line items]
Stock price at grant date \| $	$ 604
Risk-free interest rate	0.57%
Bottom of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Expected price volatility	25.34%
Expected life	1
Top of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Expected price volatility	28.28%
Expected life	3

The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2022-03-24
-Paragraph 47
-Subparagraph a
-Clause i
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-URIDate 2022-03-24

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- Definition

The option life of share options granted.

+ References

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- Definition

The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]]

+ References

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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.

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- Definition

Stock price share options granted.

+ References

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