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Retained Earnings and Dividends Paid - Summary of Dividends Paid (Details) - KRW (₩)
₩ / shares in Units, ₩ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dividends [Abstract]      
Number of shares issued 641,964,077 641,964,077 641,964,077
Number of treasury stocks 0 0 0
Number of shares eligible for dividends 641,964,077 641,964,077 641,964,077
Dividends paid per share (In won) ₩ 0 ₩ 1,216 ₩ 0
Dividends paid, ordinary shares ₩ 0 ₩ 780,628 ₩ 0