v3.26.1
Financial Risk Management - Monetary Assets and Liabilities Denominated in Foreign Currencies (Detail)
€ in Thousands, $ in Thousands, ₩ in Millions
Dec. 31, 2025
KRW (₩)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
EUR (€)
Dec. 31, 2024
KRW (₩)
Disclosure of detailed information about financial instruments [Line items]        
Monetary assets denominated in foreign currencies ₩ 7,975,070     ₩ 7,488,373
Monetary liabilities denominated in foreign currencies 13,996,145     ₩ 15,913,626
Currency risk [member]        
Disclosure of detailed information about financial instruments [Line items]        
Monetary assets denominated in foreign currencies 163,553 $ 106,150 € 6,031  
Monetary liabilities denominated in foreign currencies 1,479,885 $ 1,021,242 € 1  
Currency risk [member] | US Dollar [member]        
Disclosure of detailed information about financial instruments [Line items]        
Monetary assets denominated in foreign currencies 152,314      
Monetary liabilities denominated in foreign currencies 1,465,380      
Currency risk [member] | Euro [member]        
Disclosure of detailed information about financial instruments [Line items]        
Monetary assets denominated in foreign currencies 10,168      
Monetary liabilities denominated in foreign currencies 1      
Currency risk [member] | Other currencies [member]        
Disclosure of detailed information about financial instruments [Line items]        
Monetary assets denominated in foreign currencies 1,071      
Monetary liabilities denominated in foreign currencies ₩ 14,504