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Risk Management - Summary of Sensitivity Analysis for Electricity 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 electricity rates [Line Items]    
1% Increase ₩ 829,548 ₩ 661,990
1% Decrease (829,548) (661,990)
Increase (decrease) of shareholder's equity    
Disclosure of Sensitivity analysis for electricity rates [Line Items]    
1% Increase [1] 829,548 661,990
1% Decrease [1] ₩ (829,548) ₩ (661,990)
[1] The effect on the equity excluding the impact of income taxes.