v3.26.1
Provisions - Summary Of Changes In Provisions On Guarantees (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Reconciliation of changes in provisions for payment guarantee [Abstract]      
Beginning balance ₩ 611,428    
Changes in provisions for payment guarantee [Abstract]      
Ending balance 790,733 ₩ 611,428  
Provision for guarantee      
Reconciliation of changes in provisions for payment guarantee [Abstract]      
Beginning balance 71,470 [1] 80,703 ₩ 76,508
Changes in provisions for payment guarantee [Abstract]      
Transfer to 12-month expected credit loss 0 0 0
Transfer to expected credit loss for the entire period 0 0 0
Transfer to credit-impaired financial assets 0 0 0
Net provision (reversal) of unused amount 8,364 (5,249) 3,555
Others [2] (517) (3,984) 640
Ending balance 79,317 [1] 71,470 [1] 80,703
Provision for guarantee | Stage 1      
Reconciliation of changes in provisions for payment guarantee [Abstract]      
Beginning balance 57,309 70,678 44,496
Changes in provisions for payment guarantee [Abstract]      
Transfer to 12-month expected credit loss 536 317 20,503
Transfer to expected credit loss for the entire period (438) (230) (453)
Transfer to credit-impaired financial assets (809) (100) (4)
Net provision (reversal) of unused amount 4,005 (9,352) 5,492
Others [2] (512) (4,004) 644
Ending balance 60,091 57,309 70,678
Provision for guarantee | Stage 2      
Reconciliation of changes in provisions for payment guarantee [Abstract]      
Beginning balance 2,534 2,800 24,327
Changes in provisions for payment guarantee [Abstract]      
Transfer to 12-month expected credit loss (536) (317) (20,503)
Transfer to expected credit loss for the entire period 438 230 453
Transfer to credit-impaired financial assets (39) (90) (3)
Net provision (reversal) of unused amount 1,015 (108) (1,470)
Others [2] (5) 19 (4)
Ending balance 3,407 2,534 2,800
Provision for guarantee | Stage 3      
Reconciliation of changes in provisions for payment guarantee [Abstract]      
Beginning balance 11,627 7,225 7,685
Changes in provisions for payment guarantee [Abstract]      
Transfer to 12-month expected credit loss 0 0 0
Transfer to expected credit loss for the entire period 0 0 0
Transfer to credit-impaired financial assets 848 190 7
Net provision (reversal) of unused amount 3,344 4,211 (467)
Others [2] 0 1 0
Ending balance ₩ 15,819 ₩ 11,627 ₩ 7,225
[1] Provisions for guarantees includes provision for financial guarantee of 48,785 million Won and 52,733 million Won as of December 31, 2024 and 2025, respectively.
[2] Recognized as a result of new financial guarantee contract valued at initial fair value.