Events after the Reporting Period - Additional Information (Details) - KRW (₩) ₩ in Millions |
4 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
Jun. 10, 2026 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Jan. 31, 2026 |
|
| Treasury shares | |||||
| Disclosure of non-adjusting events after reporting period [line items] | |||||
| Purchase of treasury shares | ₩ 150,003 | ₩ 136,712 | ₩ 157,222 | ||
| Voluntary retirement program [Member] | |||||
| Disclosure of non-adjusting events after reporting period [line items] | |||||
| Amount of termination benefits on labour management agreement | ₩ 181,305 | ||||
| Major ordinary share transactions [Member] | Treasury shares | |||||
| Disclosure of non-adjusting events after reporting period [line items] | |||||
| Purchase of treasury shares | ₩ 200,000 | ||||