Business combination - Details of Business combination (Details) - KRW (₩) ₩ in Millions |
6 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Jul. 01, 2025 |
May 02, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| ABL Life Insurance Co Ltd [Member] | ||||
| Disclosure of detailed information about business combination [line items] | ||||
| Costs incurred related to business combination | ₩ 301 | |||
| Operating Income Of Acquiree | ₩ 58,653 | ₩ 124,104 | ||
| Profit Loss Of Acquiree | 55,984 | 89,840 | ||
| Percentage of Shares Acquired | 100.00% | |||
| Tongyang Life Insurance Co Ltd [Member] | ||||
| Disclosure of detailed information about business combination [line items] | ||||
| Costs incurred related to business combination | ₩ 1,972 | |||
| Proportion of ownership interest in treasury stocks | 75.30% | |||
| Operating Income Of Acquiree | 49,386 | 149,439 | ||
| Profit Loss Of Acquiree | ₩ 43,609 | ₩ 126,021 | ||
| Percentage of Shares Acquired | 77.90% |