Share-based payment Arrangement - Summary of Share Compensation Expense Recognized (Detail) - KRW (₩) ₩ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Disclosure Of Share Based Compensation Expense [line items] | ||
| Share compensation expense | ₩ 158,157 | ₩ 158,596 |
| Major share options transactions [member] | ||
| Disclosure Of Share Based Compensation Expense [line items] | ||
| Share compensation expense | ₩ (439) | |