Assets subject to lien and assets acquired through foreclosures - Details of securities loned (Details) - KRW (₩) ₩ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Disclosure of transferred financial assets that are not derecognised in their entirety [line items] | ||
| Financial assets that entity continues to recognise | ₩ 7,000,373 | ₩ 1,561,140 |
| Korean treasury and government bonds and others | ||
| Disclosure of transferred financial assets that are not derecognised in their entirety [line items] | ||
| Financial assets that entity continues to recognise | ₩ 5,573,299 | ₩ 0 |
| Description of nature of transferred financial assets that are not derecognised in their entirety | Securities loaned are lending of specific securities to borrowers who agree to return the same amount of the same security at the end of lending period. As the Group does not derecognize these securities. | Securities loaned are lending of specific securities to borrowers who agree to return the same amount of the same security at the end of lending period. As the Group does not derecognize these securities. |
| Loaned to | Korea Securities Finance Corporation and others | Korea Securities Finance Corporation and others |
| Korean treasury and government bonds | ||
| Disclosure of transferred financial assets that are not derecognised in their entirety [line items] | ||
| Financial assets that entity continues to recognise | ₩ 0 | ₩ 12,361 |
| Description of nature of transferred financial assets that are not derecognised in their entirety | Securities loaned are lending of specific securities to borrowers who agree to return the same amount of the same security at the end of lending period. As the Group does not derecognize these securities. | Securities loaned are lending of specific securities to borrowers who agree to return the same amount of the same security at the end of lending period. As the Group does not derecognize these securities. |
| Loaned to | Korea Securities Finance Corporation | Korea Securities Finance Corporation |
| Foreign currency debt securities | ||
| Disclosure of transferred financial assets that are not derecognised in their entirety [line items] | ||
| Financial assets that entity continues to recognise | ₩ 101,439 | |
| Loaned to | Nomura Financial Investment (Korea) Co., Ltd. | Nomura Financial Investment (Korea) Co., Ltd. |