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Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Details) - KRW (₩)
₩ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Cash and cash equivalents [abstract]        
Cash ₩ 17,941 ₩ 14,070    
Other demand deposits 1,712,130 1,780,548    
Short-term deposits, classified as cash equivalents 548,611 1,107,687    
Short-term investments, classified as cash equivalents 104,297 1,440,582    
Total cash and cash equivalents ₩ 2,382,979 ₩ 4,342,887 ₩ 3,234,780 ₩ 2,635,238