XML 183 R168.htm IDEA: XBRL DOCUMENT v3.25.1
Property, Plant and Equipment - Summary of Changes in Property, Plant and Equipment (Details) (Parenthetical) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of detailed information about property, plant and equipment [line items]      
Impairment loss on property, plant and equipment ₩ (11,240) ₩ (17,031) ₩ (37,311)
Revenue 92,578,265 87,476,410 70,546,024
Cost of sales 81,964,160 89,699,527 ₩ 100,903,594
Property Plant and Equipment Proceeds And Costs Before Intended Use [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Revenue 101,609 38,149  
Cost of sales 77,549 45,578  
Construction in progress [member] | Carrying Amount Other than Government Grants [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Impairment loss on property, plant and equipment 0 (10,700)  
Machinery [member] | Carrying Amount Other than Government Grants [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Impairment loss on property, plant and equipment (735) (6,331)  
Taean IGCC Gas Refinery [member] | Machinery [member] | Carrying Amount Other than Government Grants [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Impairment loss on property, plant and equipment   6,331  
Guam Ukudu Power LLC [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Revenue ₩ 112,782 0  
Guam Ukudu Power LLC [member] | Construction in progress [member] | Carrying Amount Other than Government Grants [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Impairment loss on property, plant and equipment   ₩ 10,700