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Contributed Capital - Summary of Details in Number of Outstanding Capital Stock (Details) - ₩ / shares
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of classes of share capital [line items]      
Number of shares outstanding 641,964,077 641,964,077 641,964,077
Ordinary shares [member]      
Disclosure of classes of share capital [line items]      
Shares authorized 1,200,000,000 1,200,000,000  
Shares issued 641,964,077 641,964,077  
Par value per share ₩ 5,000 ₩ 5,000  
Number of shares outstanding 641,964,077 641,964,077