XML 156 R140.htm IDEA: XBRL DOCUMENT
v3.21.1

Consolidated subsidiaries (Details) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Korea Hydro & Nuclear Power Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 100.00% | 100.00%
Korea South-East Power Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 100.00% | 100.00%
Korea Midland Power Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 100.00% | 100.00%
Korea Western Power Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 100.00% | 100.00%
Korea Southern Power Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 100.00% | 100.00%
Korea East-West Power Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 100.00% | 100.00%
KEPCO Engineering & Construction Company, Inc. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Engineering and construction for utility plant and others | Engineering and construction for utility plant and others
Location |  | KOREA | KOREA
Proportion of ownership (%) | [1] | 65.77% | 65.77%
KEPCO Plant Service & Engineering Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Utility plant maintenance and others | Utility plant maintenance and others
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 51.00% | 51.00%
KEPCO Nuclear Fuel Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Nuclear fuel | Nuclear fuel
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 96.36% | 96.36%
KEPCO KDN Co., Ltd. |  |  |
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
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 100.00% | 100.00%
KEPCO International HongKong Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | HONG KONG | HONG KONG
Proportion of ownership (%) |  | 100.00% | 100.00%
KEPCO International Philippines Inc. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | PHILIPPINES | PHILIPPINES
Proportion of ownership (%) |  | 100.00% | 100.00%
KEPCO Gansu International Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | HONG KONG | HONG KONG
Proportion of ownership (%) |  | 100.00% | 100.00%
KEPCO Philippines Holdings Inc. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | PHILIPPINES | PHILIPPINES
Proportion of ownership (%) |  | 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
Location |  | PHILIPPINES | PHILIPPINES
Proportion of ownership (%) |  | 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
Location |  | PHILIPPINES | PHILIPPINES
Proportion of ownership (%) |  | 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
Location |  | LEBANON | LEBANON
Proportion of ownership (%) |  | 100.00% | 100.00%
KEPCO Neimenggu International Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | HONG KONG | HONG KONG
Proportion of ownership (%) |  | 100.00% | 100.00%
KEPCO Shanxi International Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | HONG KONG | HONG KONG
Proportion of ownership (%) |  | 100.00% | 100.00%
KOMIPO Global Pte Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | SINGAPORE | SINGAPORE
Proportion of ownership (%) |  | 100.00% | 100.00%
KEPCO Netherlands B.V. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | NETHERLANDS | NETHERLANDS
Proportion of ownership (%) |  | 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
Location |  | FRANCE | FRANCE
Proportion of ownership (%) |  | 100.00% | 100.00%
KEPCO Australia Pty., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Location |  | AUSTRALIA | AUSTRALIA
Proportion of ownership (%) |  | 100.00% | 100.00%
KOSEP Australia Pty., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Location |  | AUSTRALIA | AUSTRALIA
Proportion of ownership (%) |  | 100.00% | 100.00%
KOMIPO Australia Pty., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Location |  | AUSTRALIA | AUSTRALIA
Proportion of ownership (%) |  | 100.00% | 100.00%
KOWEPO Australia Pty., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Location |  | AUSTRALIA | AUSTRALIA
Proportion of ownership (%) |  | 100.00% | 100.00%
KOSPO Australia Pty., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Location |  | AUSTRALIA | AUSTRALIA
Proportion of ownership (%) |  | 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
Location |  | BAHRAIN | BAHRAIN
Proportion of ownership (%) |  | 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
Location |  | JORDAN | JORDAN
Proportion of ownership (%) |  | 80.00% | 80.00%
KHNP Canada Energy, Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | CANADA | CANADA
Proportion of ownership (%) |  | 100.00% | 100.00%
KEPCO Bylong Australia Pty., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Location |  | AUSTRALIA | AUSTRALIA
Proportion of ownership (%) |  | 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
Location |  | CANADA | CANADA
Proportion of ownership (%) |  | 80.00% | 80.00%
KEPCO Holdings de Mexico |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | MEXICO | MEXICO
Proportion of ownership (%) |  | 100.00% | 100.00%
KST Electric Power Company, S.A.P.I. de C.V. |  |  |
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
Location |  | MEXICO | MEXICO
Proportion of ownership (%) |  | 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
Location |  | MEXICO | MEXICO
Proportion of ownership (%) |  | 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
Location |  | NETHERLANDS | NETHERLANDS
Proportion of ownership (%) |  | 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
Location |  | INDONESIA | INDONESIA
Proportion of ownership (%) |  | 51.00% | 51.00%
PT. Cirebon Power Service |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Operation of utility plant | Operation of utility plant
Location |  | INDONESIA | INDONESIA
Proportion of ownership (%) | [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
Location |  | PHILIPPINES | PHILIPPINES
Proportion of ownership (%) |  | 99.99% | 99.99%
KOSPO Jordan LLC |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Operation of utility plant | Operation of utility plant
Location |  | JORDAN | JORDAN
Proportion of ownership (%) |  | 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
Location |  | PHILIPPINES | PHILIPPINES
Proportion of ownership (%) |  | 0.00% | 100.00%
Reason |  | Liquidation |
EWP America Inc. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | USA | USA
Proportion of ownership (%) |  | 100.00% | 100.00%
EWP Renewable Corporation |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | USA | USA
Proportion of ownership (%) |  | 100.00% | 100.00%
DG Fairhaven Power, LLC |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | USA | USA
Proportion of ownership (%) | [3] | 100.00% | 100.00%
DG Whitefield, LLC |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | USA | USA
Proportion of ownership (%) |  | 0.00% | 100.00%
Reason |  | Sale of shares |
Springfield Power, LLC |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | USA | USA
Proportion of ownership (%) |  | 0.00% | 100.00%
Reason |  | Sale of shares |
KNF Canada Energy Limited |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | CANADA | CANADA
Proportion of ownership (%) |  | 100.00% | 100.00%
EWP Barbados 1 SRL |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | BARBADOS | BARBADOS
Proportion of ownership (%) |  | 100.00% | 100.00%
California Power Holdings, LLC |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | USA | USA
Proportion of ownership (%) |  | 100.00% | 100.00%
Gyeonggi Green Energy Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 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
Location |  | INDONESIA | INDONESIA
Proportion of ownership (%) |  | 52.50% | 52.50%
Gyeongju Wind Power Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 70.00% | 70.00%
KOMIPO America Inc. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | USA | USA
Proportion of ownership (%) |  | 100.00% | 100.00%
EWPRC Biomass Holdings, LLC |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | USA | USA
Proportion of ownership (%) |  | 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
Location |  | USA | USA
Proportion of ownership (%) |  | 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
Location |  | INDONESIA | INDONESIA
Proportion of ownership (%) |  | 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
Location |  | NETHERLANDS | NETHERLANDS
Proportion of ownership (%) |  | 100.00% | 100.00%
Korea Offshore Wind Power Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 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
Location |  | NETHERLANDS | NETHERLANDS
Proportion of ownership (%) |  | 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
Location |  | NETHERLANDS | NETHERLANDS
Proportion of ownership (%) |  | 100.00% | 100.00%
Mira Power Limited |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | PAKISTAN | PAKISTAN
Proportion of ownership (%) | [4] | 76.00% | 76.00%
KOSEP Material Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Recycling fly ashes | Recycling fly ashes
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 86.22% | 86.22%
Commerce and Industry Energy Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | KOREA | KOREA
Proportion of ownership (%) | [5] | 85.03% | 85.03%
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
Location |  | PHILIPPINES | PHILIPPINES
Proportion of ownership (%) |  | 99.99% | 99.99%
KOSPO Chile SpA |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | CHILE | CHILE
Proportion of ownership (%) |  | 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
Location |  | INDONESIA | INDONESIA
Proportion of ownership (%) |  | 95.00% | 95.00%
HeeMang Sunlight Power Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Operation of utility plant | Operation of utility plant
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 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
Location |  | JORDAN | JORDAN
Proportion of ownership (%) |  | 100.00% | 100.00%
KOSPO Youngnam Power Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Operation of utility plant | Operation of utility plant
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 50.00% | 50.00%
VI 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
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 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
Location |  | JAPAN | JAPAN
Proportion of ownership (%) |  | 80.10% | 80.10%
KEPCO Energy Solution Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Energy service | Energy service
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 100.00% | 100.00%
KEPCO Solar Co., Ltd. (formerly, Solar School Plant Co., Ltd.) |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 100.00% | 100.00%
KOSPO Power Services Ltda. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Utility plant maintenance and others | Utility plant maintenance and others
Location |  | CHILE | CHILE
Proportion of ownership (%) |  | 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
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 99.01% | 99.01%
KOEN Bylong Pty., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Location |  | AUSTRALIA | AUSTRALIA
Proportion of ownership (%) |  | 100.00% | 100.00%
KOMIPO Bylong Pty., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Location |  | AUSTRALIA | AUSTRALIA
Proportion of ownership (%) |  | 100.00% | 100.00%
KOWEPO Bylong Pty., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Location |  | AUSTRALIA | AUSTRALIA
Proportion of ownership (%) |  | 100.00% | 100.00%
KOSPO Bylong Pty., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Location |  | AUSTRALIA | AUSTRALIA
Proportion of ownership (%) |  | 100.00% | 100.00%
EWP Bylong Pty., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Resources development | Resources development
Location |  | AUSTRALIA | AUSTRALIA
Proportion of ownership (%) |  | 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
Location |  | LAOS | LAOS
Proportion of ownership (%) |  | 100.00% | 100.00%
KEPCO US Inc. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | USA | USA
Proportion of ownership (%) |  | 100.00% | 100.00%
KEPCO Alamosa LLC |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | USA | USA
Proportion of ownership (%) |  | 50.10% | 50.10%
KEPCO Solar of Alamosa, LLC |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | USA | USA
Proportion of ownership (%) |  | 100.00% | 100.00%
KEPCO Mangilao Holdings LLC (formerly, KEPCO-LG CNS Mangilao Holdings LLC) |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | USA | USA
Proportion of ownership (%) | [6] | 100.00% | 70.00%
Mangilao Investment LLC |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | USA | USA
Proportion of ownership (%) |  | 100.00% | 100.00%
KEPCO Mangilao Solar, LLC (formerly, KEPCO-LG CNS Mangilao Solar, LLC) |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | USA | USA
Proportion of ownership (%) |  | 100.00% | 100.00%
Jeju Hanlim Offshore Wind Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 75.99% | 75.99%
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
Location |  | INDONESIA | INDONESIA
Proportion of ownership (%) |  | 55.00% | 55.00%
BSK E-New Industry Fund VII |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 81.67% | 81.67%
e-New Industry LB Fund 1 |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 76.11% | 76.11%
Songhyun e-New Industry Fund |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 80.65% | 80.65%
PT. Korea Energy Indonesia |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Utility plant maintenance and others | Utility plant maintenance
Location |  | INDONESIA | INDONESIA
Proportion of ownership (%) |  | 95.00% | 95.00%
KOLAT SpA |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Utility plant maintenance and others | Utility plant maintenance and others
Location |  | CHILE | CHILE
Proportion of ownership (%) |  | 100.00% | 100.00%
KEPCO California, LLC |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | USA | USA
Proportion of ownership (%) |  | 100.00% | 100.00%
KEPCO Mojave Holdings, LLC |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | USA | USA
Proportion of ownership (%) |  | 100.00% | 100.00%
Incheon Fuel Cell Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 60.00% | 60.00%
KOEN Service Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Facility maintenance and service | Facility maintenance and service
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 100.00% | 100.00%
KOMIPO Service Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Facility maintenance and service | Facility maintenance and service
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 100.00% | 100.00%
KOWEPO Service Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Facility maintenance and service | Facility maintenance and service
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 100.00% | 100.00%
KOSPO Service Co., Ltd |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Facility maintenance and service | Facility maintenance and service
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 100.00% | 100.00%
EWP Service Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Facility maintenance and service | Facility maintenance and service
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 100.00% | 100.00%
PT. KOMIPO Energy Indonesia |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Utility plant maintenance and others | Utility plant maintenance and others
Location |  | INDONESIA | INDONESIA
Proportion of ownership (%) |  | 95.00% | 95.00%
KNF Partners Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Facility maintenance | Facility maintenance
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 100.00% | 100.00%
KOSPO USA Inc. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | USA | USA
Proportion of ownership (%) |  | 100.00% | 100.00%
Nambu USA LLC |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | USA | USA
Proportion of ownership (%) |  | 100.00% | 100.00%
Tamra Offshore Wind Power Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 63.00% | 63.00%
KEPCO MCS Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Electric meter reading and others | Electric meter reading and others
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 100.00% | 100.00%
KEPCO FMS Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Security service and others | Security service and others
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 100.00% | 100.00%
Firstkeepers Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Facility maintenance | Facility maintenance
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 100.00% | 100.00%
Secutec Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Security service | Security service
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 100.00% | 100.00%
SE Green Energy Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 84.80% | 84.80%
KEPCO Mangilao America LLC |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | USA | USA
Proportion of ownership (%) | [7] | 100.00% | 100.00%
Mangilao Intermediate Holdings LLC |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | USA | USA
Proportion of ownership (%) |  | 100.00% | 100.00%
KEPCO CSC Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Facility maintenance and service | Facility maintenance and service
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 100.00% | 100.00%
KOAK Power Limited |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Facility maintenance | Facility maintenance
Location |  | PARKISTAN | PARKISTAN
Proportion of ownership (%) |  | 100.00% | 100.00%
KOMIPO Europe B.V. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | NETHERLANDS | NETHERLANDS
Proportion of ownership (%) |  | 100.00% | 100.00%
Haenanum Energy Fund |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company | Holding company
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 99.64% | 99.64%
Paju Ecoenergy Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation | Power generation
Location |  | KOREA | KOREA
Proportion of ownership (%) |  | 89.00% | 89.00%
BSK E-New Industry Fund X |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company |
Location |  | KOREA |
Proportion of ownership (%) |  | 66.80% |
Reason |  | Newly established |
Guam Ukudu Power LLC |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation |
Location |  | USA |
Proportion of ownership (%) |  | 100.00% |
Reason |  | Newly established |
TS Energy No. 25 Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation |
Location |  | KOREA |
Proportion of ownership (%) |  | 90.00% |
Reason |  | New investment |
KPS Partners Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Facility maintenance and service |
Location |  | KOREA |
Proportion of ownership (%) |  | 100.00% |
Reason |  | Newly established |
KEPCO E&C Service Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Facility maintenance and service |
Location |  | KOREA |
Proportion of ownership (%) |  | 100.00% |
Reason |  | Newly established |
Moha Solar Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation |
Location |  | KOREA |
Proportion of ownership (%) |  | 100.00% |
Reason |  | New investment |
Ogiri Solar Power Co., Ltd. |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Power generation |
Location |  | KOREA |
Proportion of ownership (%) |  | 70.00% |
Reason |  | Newly established |
KHNP USA LLC |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company |
Location |  | USA |
Proportion of ownership (%) |  | 100.00% |
Reason |  | Newly established |
KOMIPO Vanphong Power Service LLC |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Utility plant maintenance and others |
Location |  | VIETNAM |
Proportion of ownership (%) |  | 100.00% |
Reason |  | Newly established |
Energy Innovation Fund I |  |  |
Disclosure - Ownership of KEPCO and its material consolidated subsidiaries [Line Items] |  |  |
Key operation activities |  | Holding company |
Location |  | KOREA |
Proportion of ownership (%) |  | 71.91% |
Reason |  | Additional acquisition |
[1] | Considering treasury stocks, the effective percentage of ownership is 66.08%.
[2] | The effective percentage of ownership is less than 50%. However, this subsidiary is included in the consolidated financial statements as the Company obtained the majority of the voting power through the shareholders' agreement.
[3] | As 100% of the shares held were sold after the end of the reporting period, the assets of DG Fairhaven Power, LLC were classified as assets held-for-sale.
[4] | As of the reporting date, the annual reporting period of all subsidiaries is December 31, except for Mira Power Limited which is November 30.
[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] | As of the end of the reporting period, the Company does not have a shareholding; however, this subsidiary is included in the consolidated financial statements as the Company has control over the entity by virtue of the right to nominate all 4 members of the board of directors.
[7] | As of the end of the reporting period, the Company does not have a shareholding; however, this subsidiary is included in the consolidated financial statements as the Company has control over the entity by virtue of the right to nominate the CEO and key management members.

X
- Definition The country in which a subsidiary of the entity is incorporated. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2020-01-01 -Paragraph 16 -Subparagraph b -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_16_b_ii&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2020-01-01 -Paragraph 17 -Subparagraph b -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_17_b_ii&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph 12 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_12_b&doctype=Standard -URIDate 2020-01-01 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph 19B -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_19B_b&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_CountryOfIncorporationOrResidenceOfSubsidiary
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2020-01-01 -Paragraph 17 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_17_b_iii&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2020-01-01 -Paragraph 16 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_16_b_iii&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph 19B -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_19B_c&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_ProportionOfOwnershipInterestInSubsidiary
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | kep_KeyOperationActivities
Namespace Prefix: | kep_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | kep_Reason
Namespace Prefix: | kep_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KoreaHydroNuclearPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KoreaSouthEastPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KoreaMidlandPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KoreaWesternPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KoreaSouthernPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KoreaEastWestPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOEngineeringConstructionCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOPlantServiceEngineeringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCONuclearFuelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOKDNMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOInternationalHongKongMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOInternationalPhilippinesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOGansuInternationalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOPhilippinesHoldingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOPhilippinesCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOIlijanCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOLebanonSARLMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCONeimengguInternationalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOShanxiInternationalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOMIPOGlobalPteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCONetherlandsBVMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOREAImourarenUraniumInvestmentCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOAustraliaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOSEPAustraliaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOMIPOAustraliaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOWEPOAustraliaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOSPOAustraliaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOMiddleEastHoldingCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_QatranaElectricPowerCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KHNPCanadaEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOBylongAustraliaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KoreaWaterburyUraniumLimitedPartnershipMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOHoldingsdeMexicoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KSTElectricPowerCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOEnergyServiceCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCONetherlandsS3BVMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_PTKOMIPOPembangkitanJawaBaliMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_PTCirebonPowerServiceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOWEPOInternationalCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOSPOJordanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_EWPPhilippinesCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_EWPAmericaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_EWPRenewableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_DGFairhavenPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_DGWhitefieldMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_SpringfieldPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KNFCanadaEnergyLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_EWPBarbados1SRLMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_CaliforniaPowerHoldingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_GyeonggiGreenEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_PTTanggamusElectricPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_GyeongjuWindPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOMIPOAmericaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_EWPRCBiomassHoldingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOSEPUSAINCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_PTEWPIndonesiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCONetherlandsJ3BVMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KoreaOffshoreWindPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_GlobalOnePioneerBVMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_GlobalEnergyPioneerBVMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_MiraPowerLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOSEPMaterialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_CommerceandIndustryEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOKPSPhilippinesCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOSPOChileSpAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_PTKOWEPOSumselOperationandMaintenanceServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_HeeMangSunlightPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_FujeijWindPowerCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOSPOYoungnamPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_HICarbonProfessionalPrivateSpecialAssetInvestmentTrust1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_ChitoseSolarPowerPlantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOEnergySolutionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_SolarSchoolPlantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOSPOPowerServicesLimitadaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_EnergyNewIndustrySpecializedInvestmentPrivateInvestmentTrustMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOENBylongMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOMIPOBylongMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOWEPOBylongMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOSPOBylongMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_EWPBylongMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOWEPOLaoInternationalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOUSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOAlamosaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_CogentrixofAlamosaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOLGCNSMangilaoHoldingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_MangilaoInvestmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOLGCNSMangilaoSolarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_JejuHanlimOffshoreWindCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_PTSiborpaEcoPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_BSKENewIndustryFundVIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_ENewIndustryLBFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_SonghyunENewIndustryFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_PTKoreaEnergyIndonesiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOLATSpAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOCaliforniaLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOMojaveHoldingsLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_IncheonFuelCellCo.Ltd.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOENServiceCo.Ltd.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOMIPOServiceCo.Ltd.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOWEPOServiceCo.Ltd.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOSPOServiceCo.LtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_EWPServiceCo.Ltd.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_PT.KOMIPOEnergyIndonesiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KNFPartnersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOSPOUSAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_NambuUSAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_TamraOffshoreWindPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOMCSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOFMSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_FirstkeepersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_SecutecMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_SEGreenEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOMangilaoAmericaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_MangilaoIntermediateHoldingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOCSCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOAKPowerLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOMIPOEuropeBVMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_HaenanumEnergyFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_PajuEcoenergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_BSKENewIndustryFundXMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_GuamUkuduPowerLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_TSEnergyNo25CoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KPSPartnersCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KEPCOECServiceCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_MohaSolarCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_OgiriSolarPowerCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KHNPUSALLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_KOMIPOVanphongPowerServiceLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=kep_EnergyInnovationFundIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |