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Risk Management - Summary of Sensitivity Analysis for Interest Rates (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Increase (decrease) of profit before income tax    
Disclosure Of Sensitivity Analysis For Interest Rates [Line Items]    
1% Increase ₩ (125,076) ₩ (88,121)
1% Decrease 125,076 88,121
Increase (decrease) of shareholder's equity    
Disclosure Of Sensitivity Analysis For Interest Rates [Line Items]    
1% Increase [1] (125,076) (88,121)
1% Decrease [1] ₩ 125,076 ₩ 88,121
[1] The effect on the shareholders’ equity excluding the impact of income taxes.