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v3.19.1

Consolidated subsidiaries (Details) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Korea Hydro & Nuclear Power |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
Korea South-East Power |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
Korea Midland Power |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
Korea Western Power |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
Korea Southern Power |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
Korea East-West Power |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KEPCO Engineering & Construction Company |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities | [1] | Architectural engineering for utility plant and others | Architectural engineering for utility plant and others
Country of incorporation of subsidiary | [1] | KOREA | KOREA
Proportion of ownership interest in subsidiary | [1] | 65.77% | 65.77%
KEPCO Plant Service & Engineering |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Utility plant maintenance and others | Utility plant maintenance and others
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 51.00% | 51.00%
KEPCO Nuclear Fuel |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Nuclear fuel | Nuclear fuel
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 96.36% | 96.36%
KEPCO KDN |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Electric power information technology and others | Electric power information technology and others
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
Garolim Tidal Power Plant |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities | [2] | Power generation | Power generation
Country of incorporation of subsidiary | [2] | KOREA | KOREA
Proportion of ownership interest in subsidiary | [2] | 49.00% | 49.00%
KEPCO International HongKong |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | HONG KONG | HONG KONG
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KEPCO International Philippines |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | PHILIPPINES | PHILIPPINES
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KEPCO Gansu International |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | HONG KONG | HONG KONG
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KEPCO Philippines Holdings |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | PHILIPPINES | PHILIPPINES
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KEPCO Philippines Corporation |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Operation of utility plant | Operation of utility plant
Country of incorporation of subsidiary |  | PHILIPPINES | PHILIPPINES
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KEPCO Ilijan Corporation |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Construction and operation of utility plant | Construction and operation of utility plant
Country of incorporation of subsidiary |  | PHILIPPINES | PHILIPPINES
Proportion of ownership interest in subsidiary |  | 51.00% | 51.00%
KEPCO Lebanon SARL |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Operation of utility plant | Operation of utility plant
Country of incorporation of subsidiary |  | LEBANON | LEBANON
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KEPCO Neimenggu International |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | HONG KONG | HONG KONG
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KEPCO Shanxi International |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | HONG KONG | HONG KONG
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KOMIPO Global Pte |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | SINGAPORE | SINGAPORE
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KEPCO Canada Energy |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Country of incorporation of subsidiary |  | CANADA | CANADA
Proportion of ownership interest in subsidiary |  | 0.00% | 100.00%
Reason |  | Liquidated |
KEPCO Netherlands B.V. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | NETHERLANDS | NETHERLANDS
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KOREA Imouraren Uranium Investment Corp. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | FRANCE | FRANCE
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KEPCO Australia |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Country of incorporation of subsidiary |  | AUSTRALIA | AUSTRALIA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KOSEP Australia |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Country of incorporation of subsidiary |  | AUSTRALIA | AUSTRALIA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KOMIPO Australia |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Country of incorporation of subsidiary |  | AUSTRALIA | AUSTRALIA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KOWEPO Australia |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Country of incorporation of subsidiary |  | AUSTRALIA | AUSTRALIA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KOSPO Australia |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Country of incorporation of subsidiary |  | AUSTRALIA | AUSTRALIA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KEPCO Middle East Holding Company |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | BAHRAIN | BAHRAIN
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
Qatrana Electric Power Company |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Construction and operation of utility plant | Construction and operation of utility plant
Country of incorporation of subsidiary |  | JORDAN | JORDAN
Proportion of ownership interest in subsidiary |  | 80.00% | 80.00%
KHNP Canada Energy |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | CANADA | CANADA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KEPCO Bylong Australia |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Country of incorporation of subsidiary |  | AUSTRALIA | AUSTRALIA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
Korea Waterbury Uranium Limited Partnership |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Country of incorporation of subsidiary |  | CANADA | CANADA
Proportion of ownership interest in subsidiary |  | 79.64% | 79.64%
Korea Electric Power Nigeria |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Operation of utility plant | Operation of utility plant
Country of incorporation of subsidiary |  | NIGERIA | NIGERIA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KEPCO Holdings de Mexico |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | MEXICO | MEXICO
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KST Electric Power Company |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Construction and operation of utility plant | Construction and operation of utility plant
Country of incorporation of subsidiary |  | MEXICO | MEXICO
Proportion of ownership interest in subsidiary |  | 56.00% | 56.00%
KEPCO Energy Service Company |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Operation of utility plant | Operation of utility plant
Country of incorporation of subsidiary |  | MEXICO | MEXICO
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KEPCO Netherlands S3 B.V. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | NETHERLANDS | NETHERLANDS
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
PT. KOMIPO Pembangkitan Jawa Bali |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Operation of utility plant | Operation of utility plant
Country of incorporation of subsidiary |  | INDONESIA | INDONESIA
Proportion of ownership interest in subsidiary |  | 51.00% | 51.00%
PT. Cirebon Power Service |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities | [2] | Operation of utility plant | Operation of utility plant
Country of incorporation of subsidiary | [2] | INDONESIA | INDONESIA
Proportion of ownership interest in subsidiary | [2] | 27.50% | 27.50%
KOWEPO International Corporation |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Operation of utility plant | Operation of utility plant
Country of incorporation of subsidiary |  | PHILIPPINES | PHILIPPINES
Proportion of ownership interest in subsidiary |  | 99.99% | 99.99%
KOSPO Jordan |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Operation of utility plant | Operation of utility plant
Country of incorporation of subsidiary |  | JORDAN | JORDAN
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
EWP Philippines Corporation |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | PHILIPPINES | PHILIPPINES
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
EWP America |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | USA | USA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
EWP Renewable |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | USA | USA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
DG Fairhaven Power |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Country of incorporation of subsidiary |  | USA | USA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
DG Whitefield |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Country of incorporation of subsidiary |  | USA | USA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
Springfield Power |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Country of incorporation of subsidiary |  | USA | USA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KNF Canada Energy Limited |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | CANADA | CANADA
Proportion of ownership interest in subsidiary |  | 96.36% | 96.36%
PT KEPCO Resource Indonesia |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | INDONESIA | INDONESIA
Proportion of ownership interest in subsidiary |  | 0.00% | 100.00%
Reason |  | Liquidated |
EWP Barbados 1 SRL |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | BARBADOS | BARBADOS
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
California Power Holdings |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Country of incorporation of subsidiary |  | USA | USA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
Gyeonggi Green Energy |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 62.01% | 62.01%
PT. Tanggamus Electric Power |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Country of incorporation of subsidiary |  | INDONESIA | INDONESIA
Proportion of ownership interest in subsidiary |  | 52.50% | 52.50%
Gyeongju Wind Power |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 70.00% | 70.00%
KOMIPO America |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | USA | USA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
EWPRC Biomass Holdings |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | USA | USA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KOSEP USA INC. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Country of incorporation of subsidiary |  | USA | USA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
PT. EWP Indonesia |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | INDONESIA | INDONESIA
Proportion of ownership interest in subsidiary |  | 99.96% | 99.96%
KEPCO Netherlands J3 B.V. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | NETHERLANDS | NETHERLANDS
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
Korea Offshore Wind Power |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
Global One Pioneer B.V. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | NETHERLANDS | NETHERLANDS
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
Global Energy Pioneer B.V. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | NETHERLANDS | NETHERLANDS
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
Mira Power Limited |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities | [3] | Power generation | Power generation
Country of incorporation of subsidiary | [3] | PAKISTAN | PAKISTAN
Proportion of ownership interest in subsidiary | [3] | 76.00% | 76.00%
KOSEP Material |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities | [4] | Recycling fly ashes | Recycling fly ashes
Country of incorporation of subsidiary | [4] | KOREA | KOREA
Proportion of ownership interest in subsidiary | [4] | 86.22% | 86.22%
Commerce and Industry Energy |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities | [5] | Power generation | Power generation
Country of incorporation of subsidiary | [5] | KOREA | KOREA
Proportion of ownership interest in subsidiary | [5] | 59.03% | 59.03%
KEPCO Singapore Holdings Pte. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | SINGAPORE | SINGAPORE
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KOWEPO India Private Limited |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities | [6] | Holding company | Holding company
Country of incorporation of subsidiary | [6] | INDIA | INDIA
Proportion of ownership interest in subsidiary | [6] | 0.00% | 100.00%
Reason | [6] | Liquidating |
KEPCO KPS Philippines Corp. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Utility plant maintenance and others | Utility plant maintenance and others
Country of incorporation of subsidiary |  | PHILIPPINES | PHILIPPINES
Proportion of ownership interest in subsidiary |  | 51.00% | 51.00%
KOSPO Chile SpA |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | CHILE | CHILE
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
PT. KOWEPO Sumsel Operation and Maintenance Services |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Utility plant maintenance and others | Utility plant maintenance and others
Country of incorporation of subsidiary |  | INDONESIA | INDONESIA
Proportion of ownership interest in subsidiary |  | 95.00% | 95.00%
HeeMang Sunlight Power |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Operation of utility plant | Operation of utility plant
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
Fujeij Wind Power Company |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Operation of utility plant | Operation of utility plant
Country of incorporation of subsidiary |  | JORDAN | JORDAN
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KOSPO Youngnam Power |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Operation of utility plant | Operation of utility plant
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 50.00% | 50.00%
HI Carbon Professional Private Special Asset Investment Trust 1 |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 96.67% | 96.67%
Chitose Solar Power Plant LLC |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Country of incorporation of subsidiary |  | JAPAN | JAPAN
Proportion of ownership interest in subsidiary |  | 80.10% | 80.10%
KEPCO Energy Solution |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Energy service | Energy service
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
Solar School Plant |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KOSPO Power Services Limitada |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Utility plant maintenance and others | Utility plant maintenance and others
Country of incorporation of subsidiary |  | CHILE | CHILE
Proportion of ownership interest in subsidiary |  | 65.00% | 65.00%
Energy New Industry Specialized Investment Private Investment Trust |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 99.01% | 99.75%
KOEN Bylong |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Country of incorporation of subsidiary |  | AUSTRALIA | AUSTRALIA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KOMIPO Bylong |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Country of incorporation of subsidiary |  | AUSTRALIA | AUSTRALIA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KOWEPO Bylong |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Country of incorporation of subsidiary |  | AUSTRALIA | AUSTRALIA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KOSPO Bylong |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Country of incorporation of subsidiary |  | AUSTRALIA | AUSTRALIA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
EWP Bylong |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Country of incorporation of subsidiary |  | AUSTRALIA | AUSTRALIA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KOWEPO Lao International |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Utility plant maintenance and others | Utility plant maintenance and others
Country of incorporation of subsidiary |  | LAOS | LAOS
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KEPCO US |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | USA | USA
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
KEPCO Alamosa |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | USA | USA
Proportion of ownership interest in subsidiary |  | 50.51% | 50.51%
Cogentrix Solar Services |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | USA | USA
Proportion of ownership interest in subsidiary |  | 0.00% | 50.51%
Reason |  | Liquidated |
Solar Investments I |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | USA | USA
Proportion of ownership interest in subsidiary |  | 0.00% | 50.51%
Reason |  | Liquidated |
Cogentrix of Alamosa |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Country of incorporation of subsidiary |  | USA | USA
Proportion of ownership interest in subsidiary |  | 50.51% | 50.51%
KEPCO-LG CNS Mangilao Holdings |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | USA | USA
Proportion of ownership interest in subsidiary |  | 70.00% | 70.00%
Mangilao Investment |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | USA | USA
Proportion of ownership interest in subsidiary |  | 70.00% | 70.00%
KEPCO-LG CNS Mangilao Solar |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Country of incorporation of subsidiary |  | USA | USA
Proportion of ownership interest in subsidiary |  | 70.00% | 70.00%
Jeju Hanlim Offshore Wind Co |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 68.84% | 70.22%
PT. Siborpa Eco Power |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Construction and operation of utility plant | Construction and operation of utility plant
Country of incorporation of subsidiary |  | INDONESIA | INDONESIA
Proportion of ownership interest in subsidiary |  | 55.00% | 64.71%
BSK E-New Industry Fund VII |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 80.86% | 81.47%
e-New Industry LB Fund 1 |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 75.36% | 75.92%
Songhyun e-New Industry Fund |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Country of incorporation of subsidiary |  | KOREA | KOREA
Proportion of ownership interest in subsidiary |  | 79.85% | 80.45%
PT. Korea Energy Indonesia |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Utility plant maintenance and others |
Country of incorporation of subsidiary |  | INDONESIA |
Proportion of ownership interest in subsidiary |  | 95.00% |
Reason |  | Newly Established |
KOLAT SpA |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Utility plant maintenance and others |
Country of incorporation of subsidiary |  | CHILE |
Proportion of ownership interest in subsidiary |  | 100.00% |
Reason |  | Newly Established |
KEPCO California, LLC |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company |
Country of incorporation of subsidiary |  | USA |
Proportion of ownership interest in subsidiary |  | 100.00% |
Reason |  | Newly Established |
KEPCO Mojave Holdings, LLC |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company |
Country of incorporation of subsidiary |  | USA |
Proportion of ownership interest in subsidiary |  | 100.00% |
Reason |  | Newly Established |
Incheon Fuel Cell Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation |
Country of incorporation of subsidiary |  | KOREA |
Proportion of ownership interest in subsidiary |  | 60.00% |
Reason |  | Newly Established |
KOEN Service Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Facility maintenance and service |
Country of incorporation of subsidiary |  | KOREA |
Proportion of ownership interest in subsidiary |  | 100.00% |
Reason |  | Newly Established |
KOMIPO Service Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Facility maintenance and service |
Country of incorporation of subsidiary |  | KOREA |
Proportion of ownership interest in subsidiary |  | 100.00% |
Reason |  | Newly Established |
KOWEPO Service Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Facility maintenance and service |
Country of incorporation of subsidiary |  | KOREA |
Proportion of ownership interest in subsidiary |  | 100.00% |
Reason |  | Newly Established |
KOSPO Service Co., Ltd |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Facility maintenance and service |
Country of incorporation of subsidiary |  | KOREA |
Proportion of ownership interest in subsidiary |  | 100.00% |
Reason |  | Newly Established |
EWP Service Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Facility maintenance and service |
Country of incorporation of subsidiary |  | KOREA |
Proportion of ownership interest in subsidiary |  | 100.00% |
Reason |  | Newly Established |
PT. KOMIPO Energy Indonesia |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Utility plant maintenance and others |
Country of incorporation of subsidiary |  | INDONESIA |
Proportion of ownership interest in subsidiary |  | 95.00% |
Reason |  | Newly Established |
[1] | Considering treasury stocks, the effective percentage of ownership is 66.08%.
[2] | These subsidiaries are included in the consolidated financial statements as the Company obtained the majority of the voting power through the shareholders' agreement.
[3] | As of reporting date, the annual reporting period of all subsidiaries is December 31, except for Mira Power Limited which is November 30.
[4] | The effective percentage of ownership has increased to 86.22% since Long Lasting Value exercised the put option to sell its investment to KOSEP during the year ended December 31, 2017.
[5] | The Company guarantees a certain return on investment related to Commerce and Industry Energy Co., Ltd. for the financial investors. The financial investors have a right to sell their shares to the Company which can be exercised 84 months after the date of investment. Accordingly, the purchase price including the return on investment is classified as a liability.
[6] | KOWEPO India Private Limited was in the process of liquidating its business as of December 31, 2018 and has been reclassified to assets held-for-sale, accordingly.

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