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Equity - Appropriations of Earnings (Detail) - TWD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash dividends [Member]
Appropriations of earnings	$ 36,910	$ 36,476	$ 35,746
Cash dividends per share	$ 4.758	$ 4.702	$ 4.608
Provision for (reversal of) special reserve [Member]
Appropriations of earnings		$ (185)	$ 408
Reversal of Special Reserve [Member]
Appropriations of earnings	$ (223)

X

- Definition

The amount, per share, of dividends proposed or declared before financial statements were authorised for issue but not recognised as distribution to owners.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
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-URIDate 2023-03-23

+ Details

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X

- Definition

The increase (decrease) in equity resulting from the appropriation of retained earnings. [Refer: Retained earnings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
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-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_106_d&doctype=Standard
-URIDate 2023-03-23

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