v3.26.1
Derivatives - Summary Of Derivative Assets And Derivative Liabilities (Details)
$ in Thousands, ₩ in Millions
12 Months Ended
Dec. 31, 2025
KRW (₩)
Dec. 31, 2024
KRW (₩)
Dec. 31, 2025
USD ($)
Disclosure of detailed information about hedging instruments [line items]      
Nominal amount ₩ 331,187,528 ₩ 341,468,024  
Derivative assets (Designated for hedging) 217,180 175,191 $ 150,345
Derivative liabilities for hedging ₩ 615,361 ₩ 102,815 $ 425,987
Description of other information of derivatives held for trading and hedging Derivatives held for trading are classified into financial assets at FVTPL (Note 8) and financial liabilities at FVTPL (Note 21), and derivatives designated for hedging are presented as a separate line item in the consolidated statements of financial position. Derivatives held for trading are classified into financial assets at FVTPL (Note 8) and financial liabilities at FVTPL (Note 21), and derivatives designated for hedging are presented as a separate line item in the consolidated statements of financial position.  
For fair value hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) ₩ 38,211 ₩ 10,102  
Derivative liabilities for hedging 98,039 102,635  
For cash flow hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 178,969 165,089  
Derivative liabilities for hedging 517,322 180  
For trading      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets for trading 5,774,203 10,094,532  
Derivative liabilities for trading 5,129,664 9,092,098  
Interest rate futures      
Disclosure of detailed information about hedging instruments [line items]      
Nominal amount 1,028,982 449,127  
Interest rate futures | For fair value hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 0 0  
Derivative liabilities for hedging 0 0  
Interest rate futures | For cash flow hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 0 0  
Derivative liabilities for hedging 0 0  
Interest rate futures | For trading      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets for trading 0 0  
Derivative liabilities for trading 0 0  
Interest rate forwards      
Disclosure of detailed information about hedging instruments [line items]      
Nominal amount 6,097,038 3,530,000  
Interest rate forwards | For fair value hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 0 0  
Derivative liabilities for hedging 0 0  
Interest rate forwards | For cash flow hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 7,192 0  
Derivative liabilities for hedging 139,341 0  
Interest rate forwards | For trading      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets for trading 155,174 52,855  
Derivative liabilities for trading 118,441 274,980  
Interest rate swap      
Disclosure of detailed information about hedging instruments [line items]      
Nominal amount 134,440,759 138,816,980  
Interest rate swap | For fair value hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 37,010 10,102  
Derivative liabilities for hedging 27,050 102,635  
Interest rate swap | For cash flow hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 903 0  
Derivative liabilities for hedging 0 180  
Interest rate swap | For trading      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets for trading 136,822 308,333  
Derivative liabilities for trading 141,569 199,761  
Interest rate options | Long      
Disclosure of detailed information about hedging instruments [line items]      
Nominal amount   50,000  
Interest rate options | Short      
Disclosure of detailed information about hedging instruments [line items]      
Nominal amount 320,000 360,000  
Interest rate options | For fair value hedging | Long      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging)   0  
Derivative liabilities for hedging   0  
Interest rate options | For fair value hedging | Short      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 0 0  
Derivative liabilities for hedging 0 0  
Interest rate options | For cash flow hedging | Long      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging)   0  
Derivative liabilities for hedging   0  
Interest rate options | For cash flow hedging | Short      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 0 0  
Derivative liabilities for hedging 0 0  
Interest rate options | For trading | Long      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets for trading   81  
Derivative liabilities for trading   0  
Interest rate options | For trading | Short      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets for trading 0 0  
Derivative liabilities for trading 8,194 10,595  
Currency futures      
Disclosure of detailed information about hedging instruments [line items]      
Nominal amount 131,014 2,837  
Currency futures | For fair value hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 0 0  
Derivative liabilities for hedging 0 0  
Currency futures | For cash flow hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 0 0  
Derivative liabilities for hedging 0 0  
Currency futures | For trading      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets for trading 0 0  
Derivative liabilities for trading 0 0  
Currency forward      
Disclosure of detailed information about hedging instruments [line items]      
Nominal amount 111,686,895 111,927,474  
Currency forward | For fair value hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 1,201 0  
Derivative liabilities for hedging 70,989 0  
Currency forward | For cash flow hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 2,221 0  
Derivative liabilities for hedging 236,677 0  
Currency forward | For trading      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets for trading 2,652,148 5,638,032  
Derivative liabilities for trading 1,190,226 1,805,299  
Currency swap      
Disclosure of detailed information about hedging instruments [line items]      
Nominal amount 76,846,634 85,880,218  
Currency swap | For fair value hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 0 0  
Derivative liabilities for hedging 0 0  
Currency swap | For cash flow hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 168,653 165,089  
Derivative liabilities for hedging 141,304 0  
Currency swap | For trading      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets for trading 2,827,872 4,089,265  
Derivative liabilities for trading 3,670,407 6,796,459  
Foreign Exchange Option | Long      
Disclosure of detailed information about hedging instruments [line items]      
Nominal amount 67,650 175,221  
Foreign Exchange Option | Short      
Disclosure of detailed information about hedging instruments [line items]      
Nominal amount 81,999 265,182  
Foreign Exchange Option | For fair value hedging | Long      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 0 0  
Derivative liabilities for hedging 0 0  
Foreign Exchange Option | For fair value hedging | Short      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 0 0  
Derivative liabilities for hedging 0 0  
Foreign Exchange Option | For cash flow hedging | Long      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 0 0  
Derivative liabilities for hedging 0 0  
Foreign Exchange Option | For cash flow hedging | Short      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 0 0  
Derivative liabilities for hedging 0 0  
Foreign Exchange Option | For trading | Long      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets for trading 1,267 4,779  
Derivative liabilities for trading 0 0  
Foreign Exchange Option | For trading | Short      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets for trading 0 0  
Derivative liabilities for trading 827 3,603  
Equity futures      
Disclosure of detailed information about hedging instruments [line items]      
Nominal amount 476,305 0  
Equity futures | For fair value hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 0 0  
Derivative liabilities for hedging 0 0  
Equity futures | For cash flow hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 0 0  
Derivative liabilities for hedging 0 0  
Equity futures | For trading      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets for trading 0 0  
Derivative liabilities for trading 0 0  
Equity Forwards      
Disclosure of detailed information about hedging instruments [line items]      
Nominal amount 163 1,520  
Equity Forwards | For fair value hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 0 0  
Derivative liabilities for hedging 0 0  
Equity Forwards | For cash flow hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 0 0  
Derivative liabilities for hedging 0 0  
Equity Forwards | For trading      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets for trading 104 182  
Derivative liabilities for trading 0 0  
Equity swap      
Disclosure of detailed information about hedging instruments [line items]      
Nominal amount   7,698  
Equity swap | For fair value hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging)   0  
Derivative liabilities for hedging   0  
Equity swap | For cash flow hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging)   0  
Derivative liabilities for hedging   0  
Equity swap | For trading      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets for trading   0  
Derivative liabilities for trading   1,401  
Equity options | Long      
Disclosure of detailed information about hedging instruments [line items]      
Nominal amount 1,711 1,767  
Equity options | Short      
Disclosure of detailed information about hedging instruments [line items]      
Nominal amount   0  
Equity options | For fair value hedging | Long      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 0 0  
Derivative liabilities for hedging 0 0  
Equity options | For fair value hedging | Short      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging)   0  
Derivative liabilities for hedging   0  
Equity options | For cash flow hedging | Long      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 0 0  
Derivative liabilities for hedging 0 0  
Equity options | For cash flow hedging | Short      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging)   0  
Derivative liabilities for hedging   0  
Equity options | For trading | Long      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets for trading 816 1,005  
Derivative liabilities for trading 0 0  
Equity options | For trading | Short      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets for trading   0  
Derivative liabilities for trading   ₩ 0  
Others Futures      
Disclosure of detailed information about hedging instruments [line items]      
Nominal amount 8,378    
Others Futures | For fair value hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 0    
Derivative liabilities for hedging 0    
Others Futures | For cash flow hedging      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets (Designated for hedging) 0    
Derivative liabilities for hedging 0    
Others Futures | For trading      
Disclosure of detailed information about hedging instruments [line items]      
Derivative assets for trading 0    
Derivative liabilities for trading ₩ 0