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Dividends - Schedule of dividends payable (Details) - Preferred Stock Issue [Member]
₩ / shares in Units, ₩ in Millions
 12 Months Ended
Dec. 31, 2023
KRW (₩)
₩ / shares
shares
 [1]
Schedule Of Dividends Payable [Line Items]  
Number of shares | shares 17,482,000
Dividend per share ₩ 525
Total dividend paid | ₩ ₩ 9,178
Issue price per share ₩ 42,900
Dividend rate per issue price (%) 1.22%
[1] Convertible preferred shares of 17,482,000 that were issued on May 1, 2019 have been converted into common shares at a 1:1 ratio on May 1, 2023, and dividends were paid before conversion.