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Other assets - Summary of other assets (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2025 | Dec. 31, 2024
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Other Assets Disclosure [Abstract] |  |
Accounts receivable | ₩ 27,441,511 | ₩ 13,611,340
Domestic exchange settlement debit | 11,258,959 | 4,909,780
Guarantee deposits | 985,307 | 982,836
Discounted present value | (51,293) | (57,626)
Accrued income | 3,774,852 | 3,810,267
Prepaid expense | 393,748 | 381,091
Provisional payments | 417,246 | 411,923
Sundry assets | 250,017 | 136,079
Advance payments | 671,143 | 484,828
Leased assets | 1,890,090 | 2,125,379
Others | 34,087 | 180,005
Allowances for credit loss of other assets | (541,316) | (574,304)
Total Other Assets | ₩ 46,524,351 | ₩ 26,401,598

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- Definition The amount of assets that the entity does not separately disclose in the same statement or note. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_55&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The amount receivable by the entity that it does not separately disclose in the same statement or note. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph B9 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_B9_b&doctype=Appendix&subtype=B -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 78 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_78_b&doctype=Standard -URIDate 2025-03-27 + Details
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