Contingent Liabilities and Commitments - Disclosure of obligations related to guaranteed completion (Details) ₩ in Millions |
Dec. 31, 2025
KRW (₩)
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| Disclosure Of Obligations Related To Guaranteed Completion With Trust Business [Line Items] | ||||||||||
| Initial PF Commitment Limit | ₩ 298,499 | |||||||||
| Amount of PF Loans | 84,743 | [1] | ||||||||
| Amount of unused PF limit | 152,079 | [2] | ||||||||
| Amount of Trust Account Limit | 38,200 | [2] | ||||||||
| Amount of Trust Account | 20,271 | |||||||||
| Responsible completion land trust [Member] | ||||||||||
| Disclosure Of Obligations Related To Guaranteed Completion With Trust Business [Line Items] | ||||||||||
| Initial PF Commitment Limit | 200,000 | [3] | ||||||||
| Amount of PF Loans | 38,733 | [1],[3] | ||||||||
| Amount of unused PF limit | 55,013 | [2],[3] | ||||||||
| Amount of Trust Account Limit | 5,700 | [2],[3] | ||||||||
| Amount of Trust Account | 5,685 | [3] | ||||||||
| Redevelopment Land Trust [Member] | ||||||||||
| Disclosure Of Obligations Related To Guaranteed Completion With Trust Business [Line Items] | ||||||||||
| Initial PF Commitment Limit | 98,499 | [4] | ||||||||
| Amount of PF Loans | 46,010 | [1],[4] | ||||||||
| Amount of unused PF limit | 97,066 | [2],[4] | ||||||||
| Amount of Trust Account Limit | 32,500 | [2],[4] | ||||||||
| Amount of Trust Account | ₩ 14,586 | [4] | ||||||||
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