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Financial risk management - Maturity analysis for derivatives (Details) - Derivatives - KRW (₩) ₩ in Millions | Dec. 31, 2025 | Dec. 31, 2024
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Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivatives | ₩ (2,356,046) | ₩ (1,634,074)
Less than 1 month |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivatives | 771,588 | 453,751
1~3 months |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivatives | (810,792) | (12,670)
3~6 months |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivatives | (29,804) | (68,634)
6 months ~ 1 year |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivatives | (93,500) | 6,511
1~5 years |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivatives | (2,117,259) | (1,847,862)
More than 5 years |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivatives | ₩ (76,279) | ₩ (165,170)

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- Definition The amount of contractual undiscounted cash flows in relation to derivative financial liabilities. [Refer: Derivative financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 72 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_72_b&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2025-01-01 -Paragraph 39 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_39_b&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 72 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_72_b&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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