XML 171 R155.htm IDEA: XBRL DOCUMENT v3.21.1
Intangible Assets other than Goodwill (Details)
$ in Thousands, ₩ in Millions
 12 Months Ended
Dec. 31, 2020
KRW (₩)
Dec. 31, 2019
KRW (₩)
Dec. 31, 2020
AUD ($)
Dec. 31, 2019
AUD ($)
Software | ERP system and others        
Disclosure of intangible assets material to entity [Line Items]        
Carrying value ₩ 81 ₩ 432    
Remaining amortisation period of intangible assets material to entity 2 months ~ 4 months 1 years and 2 months ~ 1 years and 4 months    
Software | Electricity sales information system        
Disclosure of intangible assets material to entity [Line Items]        
Carrying value   ₩ 4,824    
Remaining amortisation period of intangible assets material to entity   3 years    
Copyrights, patents rights and other industrial rights | Smart technology verification and standard design project conducting right        
Disclosure of intangible assets material to entity [Line Items]        
Carrying value ₩ 4,936 ₩ 6,787    
Remaining amortisation period of intangible assets material to entity 1 years and 9 months 2 years and 9 months    
Copyrights, patents rights and other industrial rights | Contributions to ARP NRC DC        
Disclosure of intangible assets material to entity [Line Items]        
Carrying value ₩ 29,219 ₩ 34,755    
Remaining amortisation period of intangible assets material to entity 7 years 8 years    
Mining rights | Mining right of Bylong mine        
Disclosure of intangible assets material to entity [Line Items]        
Carrying value | $     $ 0 $ 0
Remaining amortisation period of intangible assets material to entity The carrying amount of mining right does not exist, because KEPCO Australia Pty., Ltd. and KEPCO Bylong Australia Pty., Ltd. had recognized impairment losses in full. The carrying amount of mining right does not exist, because KEPCO Australia Pty., Ltd. and KEPCO Bylong Australia Pty., Ltd. recognized impairment losses in full during the year ended December 31, 2019.    
Development expenditures | Electricity sales information system        
Disclosure of intangible assets material to entity [Line Items]        
Carrying value ₩ 8,229 ₩ 15,283    
Remaining amortisation period of intangible assets material to entity 1 years and 2 months 2 years and 3 months    
Usage rights of donated assets and other | Dangjin power plant load facility usage right        
Disclosure of intangible assets material to entity [Line Items]        
Carrying value ₩ 1,574 ₩ 7,870    
Remaining amortisation period of intangible assets material to entity 3 months 1 years 3 months    
Usage rights of donated assets and other | Right of use electricity and gas supply facility (Community district of Songdo)        
Disclosure of intangible assets material to entity [Line Items]        
Carrying value ₩ 10,016      
Remaining amortisation period of intangible assets material to entity 9 years and 6 months      
Usage rights of donated assets and other | Sejong Haengbogdosi sharing charge        
Disclosure of intangible assets material to entity [Line Items]        
Carrying value ₩ 26,847 ₩ 31,385    
Remaining amortisation period of intangible assets material to entity 5 years and 11 months 6 years and 11 months    
Others | Occupancy and use of public waters        
Disclosure of intangible assets material to entity [Line Items]        
Carrying value ₩ 87,035 ₩ 92,446    
Remaining amortisation period of intangible assets material to entity 16 years 1 months 17 years 1 months    
Others | Greenhouse gas emissions rights        
Disclosure of intangible assets material to entity [Line Items]        
Carrying value ₩ 61,373      
Remaining amortisation period of intangible assets material to entity -      
Others | Business rights        
Disclosure of intangible assets material to entity [Line Items]        
Carrying value ₩ 166,207 ₩ 171,955    
Remaining amortisation period of intangible assets material to entity 28 years 11 months 29 years 11 months