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Financial liabilities designated at fair value through profit or loss - Summary of financial liabilities at fair value through profit or loss (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2025	Dec. 31, 2024
Financial liabilities designated at fair value through profit or loss [Line Items]
Financial liabilities designated at fair value through profit or loss	₩ 6,378,064	₩ 8,220,475
Financial liabilities designated at fair value through profit or loss
Financial liabilities designated at fair value through profit or loss [Line Items]
Financial liabilities designated at fair value through profit or loss	6,378,064	8,220,475
Debt securities issued
Financial liabilities designated at fair value through profit or loss [Line Items]
Financial liabilities designated at fair value through profit or loss	287,849	261,299
Derivative-linked securities sold
Financial liabilities designated at fair value through profit or loss [Line Items]
Financial liabilities designated at fair value through profit or loss	₩ 6,090,215	₩ 7,959,176

X

- Definition

The amount of financial liabilities at fair value through profit or loss that were designated as such upon initial recognition or subsequently. [Refer: At fair value [member]; Financial liabilities at fair value through profit or loss]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2025-01-01
-Paragraph 8
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_8_e&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 44
-Subparagraph b
-Clause i
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_44_b_i&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 44
-Subparagraph b
-Clause i
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_44_b_i&doctype=Standard
-URIDate 2025-03-27

+ Details

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X

- References

No definition available.

+ Details

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- Details

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- Details

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X

- Details

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