v3.26.1
Net Insurance Finance Income (Expense) - Summary Of Investment And Insurance Finance Income (Details)
$ in Thousands, ₩ in Millions
 12 Months Ended
Dec. 31, 2025
KRW (₩)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
KRW (₩)
Dec. 31, 2023
KRW (₩)
Investment And Insurance Finance Income [Line Items]        
Interest income ₩ 21,188,743 $ 14,668,058 ₩ 22,013,341 ₩ 20,641,554
Other insurance finance income recognized in net income (9,186) $ (6,359) ₩ 0 ₩ 0
Total investment and insurance/reinsurance finance income or expenses recognized in profit or loss 5,215      
Total investment and insurance/reinsurance finance income or expenses recognized in other comprehensive income 409,529      
Total investment and insurance/reinsurance finance income or expenses recognized in profit or loss and other comprehensive income 414,744      
Investment income [Member]        
Investment And Insurance Finance Income [Line Items]        
Interest income 641,077      
Gain on financial assets 516,360      
Other investment income (27,257)      
Investment income recognized in net income 1,130,180      
Investment income recognized in other comprehensive income [1] (1,966,190)      
Total investment income (836,010)      
Insurance finance interest income and other insurance finance income [member]        
Investment And Insurance Finance Income [Line Items]        
Interest income (753,740)      
Effect of change in fair value of underlying assets of participating insurance contracts (418,880)      
Effect of changes in discount rates and others 40,385      
Other insurance finance income recognized in net income (1,132,235)      
Insurance finance income or expenses recognized in other comprehensive income [1] 2,395,876      
Total Insurance finance interest income and other insurance finance income 1,263,641      
Reinsurance finance interest income and other reinsurance finance income [member]        
Investment And Insurance Finance Income [Line Items]        
Interest income 6,905      
Effect of changes in credit risk of reinsurance liabilities 365      
Effect of changes in discount rates and others 0      
Other reinsurance finance income recognized in net income 7,270      
Reinsurance finance income recognized in other comprehensive income [1] (20,157)      
Total Reinsurance finance interest income and other reinsurance finance income ₩ (12,887)      
[1] The finance income recognized in other comprehensive income is the amount before deducting tax and non-controlling interests.