Inventories - Amount of the Inventory Write-downs Charged to the Consolidated Statement of Income and Write-off of Inventories (Detail) - KRW (₩) ₩ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Classes of current inventories [abstract] | |||
| Charged to cost of products that have been resold | ₩ 66 | ₩ 1,592 | ₩ 2,033 |
| Write-off upon sale | ₩ 0 | ₩ (1,106) | ₩ (8) |