v3.26.1
Derivatives - Summary of Amounts Recognized In Profit Or Loss Due To The Ineffective Portion Of Fair Value Hedges And Reclassification Of Profit Or Loss From Other Comprehensive income And Equity Related To Cash Flow Hedges (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
For fair value hedging | Interest rate risk      
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]      
Hedge ineffectiveness recognized in profit or loss ₩ 12,788 ₩ (12,152) ₩ (2,655)
Line item in the profit or loss that includes hedge ineffectiveness Other net operating income(expense) Other net operating income(expense) Other net operating income(expense)
For fair value hedging | Foreign currencies translation risk      
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]      
Hedge ineffectiveness recognized in profit or loss ₩ 13,794    
Line item in the profit or loss that includes hedge ineffectiveness Other net operating income(expense)    
For cash flow hedging | Interest rate risk      
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]      
Changes in the value of hedging instruments recognized in OCI ₩ (155,816) ₩ 211 ₩ (2,433)
Hedge ineffectiveness recognized in profit or loss (42,521) 0 0
Changes in the value of foreign basis spread recognized in OCI ₩ 0 ₩ 0 ₩ 0
Line item in the profit or loss that includes hedge ineffectiveness Other net operating income (expense) Other net operating income (expense) Other net operating income (expense)
Amounts reclassified from cash flow hedge reserve to profit or loss ₩ (42,755) ₩ 0 ₩ 0
Line item affected in profit or loss due to reclassification Other net operating income (expense) Other net operating income (expense) Other net operating income (expense)
For cash flow hedging | Foreign currencies translation risk and interest rate risk      
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]      
Changes in the value of hedging instruments recognized in OCI ₩ (69,243) ₩ 110,714 ₩ (913)
Hedge ineffectiveness recognized in profit or loss (21,806) 0 0
Changes in the value of foreign basis spread recognized in OCI ₩ (54) ₩ 3,481 ₩ (4,871)
Line item in the profit or loss that includes hedge ineffectiveness Other net operating income (expense) Other net operating income (expense) Other net operating income (expense)
Amounts reclassified from cash flow hedge reserve to profit or loss ₩ 70,854 ₩ (113,202) ₩ (11,683)
Line item affected in profit or loss due to reclassification Other net operating income (expense) Other net operating income (expense) Other net operating income (expense)
For cash flow hedging | Foreign currencies translation risk      
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]      
Changes in the value of hedging instruments recognized in OCI ₩ (95,138) ₩ 41,135 ₩ 13,419
Hedge ineffectiveness recognized in profit or loss (394) 0 0
Changes in the value of foreign basis spread recognized in OCI ₩ (153) ₩ 980 ₩ (3,521)
Line item in the profit or loss that includes hedge ineffectiveness Other net operating income (expense) Other net operating income (expense) Other net operating income (expense)
Amounts reclassified from cash flow hedge reserve to profit or loss ₩ 66,009 ₩ (37,955) ₩ (6,950)
Line item affected in profit or loss due to reclassification Other net operating income (expense) Other net operating income (expense) Other net operating income (expense)