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Risk Management - Summary of Principal Assumptions on Provisions Valuation (Details) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
PCBs | Inflation Rate, Measurement Input [Member] |  |
Disclosure of Principal assumptions on provisions valuation [Line Items] |  |
Inflation rate | 2.80% | 2.40%
PCBs | Discount rate, measurement input [member] |  |
Disclosure of Principal assumptions on provisions valuation [Line Items] |  |
Discount rate | 2.9 | 2.12
Nuclear plants | Inflation Rate, Measurement Input [Member] |  |
Disclosure of Principal assumptions on provisions valuation [Line Items] |  |
Inflation rate | 2.02% | 1.91%
Nuclear plants | Discount rate, measurement input [member] |  |
Disclosure of Principal assumptions on provisions valuation [Line Items] |  |
Discount rate | 2.78 | 2.76
Spent fuel | Inflation Rate, Measurement Input [Member] |  |
Disclosure of Principal assumptions on provisions valuation [Line Items] |  |
Inflation rate | 1.91% | 1.91%
Spent fuel | Discount rate, measurement input [member] |  |
Disclosure of Principal assumptions on provisions valuation [Line Items] |  |
Discount rate | 2.49 | 2.49
Radioactive waste | Inflation Rate, Measurement Input [Member] |  |
Disclosure of Principal assumptions on provisions valuation [Line Items] |  |
Inflation rate | 3.32% | 3.89%
Radioactive waste | Discount rate, measurement input [member] |  |
Disclosure of Principal assumptions on provisions valuation [Line Items] |  |
Discount rate | 4.17 | 3.65

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- Definition The value of significant unobservable input used in the measurement of the fair value of liabilities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2024-01-01 -Paragraph 93 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2024-en-r&anchor=para_93_d&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition Disclosure of Principal assumptions on provisions valuation [Line item]. + References No definition available. + Details
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Namespace Prefix: | kep_
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- Definition Inflation rate. + References No definition available. + Details
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Namespace Prefix: | kep_
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- Details
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- Details
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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Balance Type: |
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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