Segment Information - Schedule of Non-Current Assets by Geographical Regions (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disclosure of geographical areas [line items]
Non-current assets	₩ 33,128	₩ 25,465	₩ 23,506
Korea
Disclosure of geographical areas [line items]
Non-current assets	25,904	18,990	15,488
Overseas
Disclosure of geographical areas [line items]
Non-current assets	7,224	6,475	8,018
Taiwan
Disclosure of geographical areas [line items]
Non-current assets	₩ 2,584	₩ 2,613	₩ 3,528

The amount of non-current assets other than financial instruments, deferred tax assets, post-employment benefit assets and rights arising under insurance contracts. [Refer: Deferred tax assets; Classes of financial instruments [domain]; Non-current assets]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2025-01-01
-Paragraph 33
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_33_b&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_NoncurrentAssetsOtherThanFinancialInstrumentsDeferredTaxAssetsPostemploymentBenefitAssetsAndRightsArisingUnderInsuranceContracts
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant