Dividends - Additional Information (Details) ₩ / shares in Units, ₩ in Millions			12 Months Ended
Nov. 10, 2025 KRW (₩)	Nov. 10, 2025 $ / shares	May 10, 2025 KRW (₩) ₩ / shares	Aug. 10, 2026 KRW (₩) ₩ / shares	Dec. 31, 2025 KRW (₩) ₩ / shares	Dec. 31, 2024 KRW (₩) ₩ / shares
Dividends [Abstract]
Dividends paid per share \| ₩ / shares					₩ 760	₩ 660
Dividends paid					₩ 557,431	₩ 490,075
Dividends proposed \| (per share)		$ 200	₩ 200	₩ 200
Interim dividends paid	₩ 146,804		₩ 147,428	₩ 146,804

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 162
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_162_a&doctype=Standard
-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph B17
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_B17_a&doctype=Appendix&subtype=B
-URIDate 2025-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 137
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_137_a&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwnersPerShare
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:perShareItemType
Balance Type:	na
Period Type:	duration