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Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Details) - KRW (₩)
₩ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Cash and cash equivalents [abstract]        
Cash ₩ 14,070 ₩ 21,113    
Other demand deposits 1,780,548 1,906,248    
Short-term deposits, classified as cash equivalents 1,107,687 1,063,290    
Short-term investments, classified as cash equivalents 1,440,582 244,129    
Total cash and cash equivalents ₩ 4,342,887 ₩ 3,234,780 ₩ 2,635,238 ₩ 2,029,584