Reserves - Changes In Valuation Gain (Loss) On Financial Assets At FVOCI (Detail) - KRW (₩) ₩ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Disclosure of reserves within equity [Line Items] | ||
| Balance as of December 31 | ₩ 646,943 | ₩ 387,216 |
| Balance as of December 31 | 2,025,682 | 646,943 |
| Valuation gain (loss) on financial assets at FVOCI [member] | ||
| Disclosure of reserves within equity [Line Items] | ||
| Balance as of December 31 | 262,657 | 176,208 |
| Amount recognized as other comprehensive income for the year, net of taxes | 1,464,741 | 11,262 |
| Amount reclassified to retained earnings, net of taxes | (157,084) | 75,187 |
| Balance as of December 31 | ₩ 1,570,314 | ₩ 262,657 |