v3.26.1
Net Insurance Income - Summary of The net insurance service result for the period (Details)
$ in Thousands, ₩ in Millions
 12 Months Ended
Dec. 31, 2025
KRW (₩)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
KRW (₩)
Dec. 31, 2023
KRW (₩)
Disclosure of analysis of insurance revenue [abstract]        
Insurance service result of insurance contracts ₩ 104,164      
Insurance income 1,005,778 $ 696,257 ₩ 0 ₩ 0
Estimated incurred claims and other insurance service expenses 664,038      
Changes in risk adjustment for non-financial risk 26,471      
Amortization of contractual service margin (CSM) 154,187      
Amortization of insurance acquisition cash flows 148,980      
Changes in loss recovery component (288)      
Other insurance income 12,390      
Insurance service expenses 901,614 624,149 0 0
Actual incurred claims and other insurance service expenses 689,461      
Amortization of insurance acquisition cash flows 148,980      
Changes in liability for incurred claims 23,777      
(Reversal of) loss component allocation amount 32,478      
Other operating expenses 6,918      
Insurance service result of reinsurance contracts (293)      
Reinsurance income 36,719      
Actual incurred claims and reinsurance service expenses 32,341      
Changes in asset for incurred claims 3,745      
(Reversal of) Loss recovery component allocation amount 633      
Reinsurance service expenses 37,012 $ 25,622 ₩ 0 ₩ 0
Estimated incurred claims and reinsurance service expenses 28,120      
Reinsurance service expenses - Changes in risk adjustment for non-financial risk 1,024      
Amortization of contractual service margin (CSM) 7,868      
Net insurance income ₩ 103,871