Other Current Monetary Assets - Summary of Other Current Monetary Assets (Detail) $ in Millions, $ in Millions	Dec. 31, 2021 TWD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 TWD ($)
Disclosure Of Other Current Monetary Assets [Abstract]
Time deposits and negotiable certificates of deposit with maturities of more than three months	$ 3,499		$ 4,596
Others	1,562		1,528
Other current monetary assets	$ 5,061	$ 183	$ 6,124

The amount of current financial assets that the entity does not separately disclose in the same statement or note. [Refer: Other financial assets; Current financial assets]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 54
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_54_d&doctype=Standard
-URIDate 2021-03-24

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Period Type:	instant