The amount of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Impairment loss recognised in profit or loss; Property, plant and equipment]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2024-01-01
-Paragraph 73
-Subparagraph e
-Clause v
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e_v&doctype=Standard
-URIDate 2024-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 98
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_98_a&doctype=Standard
-URIDate 2024-03-27

Name:	ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

Property, Plant and Equipment - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2024 TWD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 TWD ($)	Dec. 31, 2022 TWD ($)
Disclosure Of Property Plant And Equipment [Line Items]
Impairment loss on property, plant and equipment	$ 0	$ 0	$ 299,000,000	$ 0
Property, plant and equipment subject to operating leases [member] \| Bottom of Range [Member]
Disclosure Of Property Plant And Equipment [Line Items]
Lease period	1 year	1 year
Property, plant and equipment subject to operating leases [member] \| Top of Range [Member]
Disclosure Of Property Plant And Equipment [Line Items]
Lease period	20 years	20 years
Assets Used by the Company [Member]
Disclosure Of Property Plant And Equipment [Line Items]
Impairment loss on property, plant and equipment	$ 0		$ 299,000,000	$ 0