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Employment Benefits - Additional Information (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure Of Employment Benefit Obligations [Line Items]      
Gain on accumulated remeasurement components ₩ 614,805 ₩ 98,844  
Return on plan assets 61,875 44,325  
Construction In Process And Others      
Disclosure Of Employment Benefit Obligations [Line Items]      
Employee benefit expense 14,827 13,025 ₩ 11,861
Cost of sales      
Disclosure Of Employment Benefit Obligations [Line Items]      
Employee benefit expense 101,369 71,976 60,587
Selling and administrative expense      
Disclosure Of Employment Benefit Obligations [Line Items]      
Employee benefit expense ₩ 28,301 ₩ 17,144 ₩ 9,121