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Earnings Per Share - Net Income and Weighted Average Number of Common Stocks Used in Calculation of Earnings Per Share (Detail) shares in Millions, $ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024 TWD ($) shares	Dec. 31, 2024 USD ($) shares	Dec. 31, 2023 TWD ($) shares	Dec. 31, 2022 TWD ($) shares
Net income used to compute the basic earnings per share
Net income attributable to the parent	$ 37,189	$ 1,134	$ 36,958	$ 36,358
Assumed conversion of all dilutive potential common stocks
Employee stock options and employee compensation of subsidiaries | $	(3)		(5)	(7)
Net income used to compute the diluted earnings per share | $	$ 37,186		$ 36,953	$ 36,351
Weighted average number of common stocks used to compute the basic earnings per share	7,757	7,757	7,757	7,757
Assumed conversion of all dilutive potential common stocks
Employee compensation	18	18	8	8
Weighted average number of common stocks used to compute the diluted earnings per share	7,775	7,775	7,765	7,765

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- Definition

Assumed conversion of employee stock options, employee bonus and compensation of subsidiaries.

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Dilutive effect on net income.

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The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

+ References

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- Definition

The potential dilutive effect on the weighted average number of ordinary shares that relate to the assumed exercise of the entity's share options.

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The profit (loss) attributable to ordinary equity holders of the parent entity, adjusted for the effects of all dilutive potential ordinary shares. [Refer: Profit (loss)]

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The profit (loss) from continuing and discontinued operations attributable to owners of the parent. [Refer: Profit (loss)]

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The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

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