The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
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-IssueDate 2025-01-01
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The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

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Disclosure Of Detailed Information About Financial Instruments Under Cash Flow Hedge.

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Derivative Instruments - Detailed Information about Financial Instruments under Cash Flow Hedge (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2025	Dec. 31, 2024
Hedging instrument (Hedged item)
Derivative financial assets	₩ 310,146	₩ 341,108
Derivative financial liabilities	6,403	3,437
Held For Trading [member]
Hedging instrument (Hedged item)
Derivative financial assets	108,884
Derivative financial liabilities	(5,782)
Fair value [member]
Hedging instrument (Hedged item)
Derivative financial assets	108,884
Derivative financial liabilities		₩ (5,782)
Total return swap [member] \| Held For Trading [member]
Hedging instrument (Hedged item)
Derivative financial assets	97,654
Total return swap [member] \| Fair value [member]
Hedging instrument (Hedged item)
Derivative financial assets	97,654
Exchange Option [Member] \| Held For Trading [member]
Hedging instrument (Hedged item)
Derivative financial liabilities	(3,432)
Exchange Option [Member] \| Fair value [member]
Hedging instrument (Hedged item)
Derivative financial liabilities	(3,432)
Price Return Swap [Member] \| Held For Trading [member]
Hedging instrument (Hedged item)
Derivative financial liabilities	(555)
Price Return Swap [Member] \| Fair value [member]
Hedging instrument (Hedged item)
Derivative financial liabilities	(555)
Forward contract [member] \| Held For Trading [member]
Hedging instrument (Hedged item)
Derivative financial liabilities	(26)
Forward contract [member] \| Fair value [member]
Hedging instrument (Hedged item)
Derivative financial liabilities	(26)
Share option [member] \| Held For Trading [member]
Hedging instrument (Hedged item)
Derivative financial assets	11,230
Derivative financial liabilities	(1,769)
Share option [member] \| Fair value [member]
Hedging instrument (Hedged item)
Derivative financial assets	11,230
Derivative financial liabilities	₩ (1,769)