Financial liabilities 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 at fair value through profit or loss [Line Items]
Financial liabilities at fair value through profit or loss	₩ 2,312,487	₩ 954,899
Securities sold
Financial liabilities at fair value through profit or loss [Line Items]
Financial liabilities at fair value through profit or loss	790,416	357,841
Stocks
Financial liabilities at fair value through profit or loss [Line Items]
Financial liabilities at fair value through profit or loss	11,360	640
Bonds
Financial liabilities at fair value through profit or loss [Line Items]
Financial liabilities at fair value through profit or loss	779,056	354,084
Other
Financial liabilities at fair value through profit or loss [Line Items]
Financial liabilities at fair value through profit or loss	0	3,117
Gold/silver deposits
Financial liabilities at fair value through profit or loss [Line Items]
Financial liabilities at fair value through profit or loss	₩ 1,522,071	₩ 597,058

- Definition

The amount of financial liabilities that meet either of the following conditions: (a) they meet the definition of held for trading; or (b) upon initial recognition they are designated by the entity as at fair value through profit or loss. An entity may use this designation only when permitted by paragraph 4.3.5 of IFRS 9 (embedded derivatives) or when doing so results in more relevant information, because either: (a) it eliminates or significantly reduces a measurement or recognition inconsistency (sometimes referred to as ‘an accounting mismatch’) that would otherwise arise from measuring assets or liabilities or recognising the gains and losses on them on different bases; or (b) a group of financial liabilities or financial assets and financial liabilities is managed and its performance is evaluated on a fair value basis, in accordance with a documented risk management or investment strategy, and information about the group is provided internally on that basis to the entity’s key management personnel (as defined in IAS 24). [Refer: At fair value [member]; Key management personnel of entity or parent [member]; Derivatives [member]; Financial assets; Financial liabilities]

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