v3.26.1
Reserves - Changes in Valuation Gain (Loss) on Derivatives (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 derivatives [Member]    
Disclosure of reserves within equity [Line Items]    
Balance as of December 31 (8,044) (1,488)
Amount recognized as other comprehensive loss for the year, net of taxes 16,408 (12,636)
Amount reclassified to profit, net of taxes 6,139 6,080
Balance as of December 31 ₩ 14,503 ₩ (8,044)