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Financial liabilities designated at fair value through profit or loss - Summary of Contractual Liability (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2025	Dec. 31, 2024
Disclosure of Financial assets designated as measured at fair value through profit or loss [Line Items]
Expiration payment	₩ 6,140,775	₩ 8,001,931
Carrying amount	6,378,064	8,220,475
Difference from carrying amount	₩ (237,289)	₩ (218,544)

X

- Definition

The amount by which the carrying amount of a financial liability is more (less) than the amount that the entity would be contractually required to pay at maturity to the holder of the obligation. [Refer: Carrying amount [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2025-01-01
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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-URIDate 2025-03-27

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
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-URIDate 2025-03-27

+ Details

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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
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X

- Definition

The amount of financial liabilities in the statement of financial position that were previously designated as measured at fair value through profit or loss but are no longer so designated when the entity initially applies IFRS 9. [Refer: 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
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-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_42I_c&doctype=Standard
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X

- Definition

Disclosure of Financial assets designated as measured at fair value through profit or loss.

+ References

No definition available.

+ Details

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