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Risk Management - Summary of Fair Value Measurement of Financial Instruments (Details) - At fair value - KRW (₩)
₩ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure of fair value measurement of liabilities [line items]    
Derivative liabilities ₩ 284,825 ₩ 452,234
Level 1    
Disclosure of fair value measurement of liabilities [line items]    
Derivative liabilities 0 0
Level 2    
Disclosure of fair value measurement of liabilities [line items]    
Derivative liabilities 284,825 452,234
Level 3    
Disclosure of fair value measurement of liabilities [line items]    
Derivative liabilities ₩ 0 ₩ 0