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Consolidated Statements of Financial Position - KRW (₩) ₩ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Current assets |  |  |
Cash and cash equivalents (Notes 5,6,7 and 45) |  | ₩ 4,342,887 | ₩ 3,234,780
Current financial assets, net (Notes 5,6,9,11,12,13,45 and 47) |  | 3,107,397 | 4,286,975
Trade and other receivables, net (Notes 5,8,20,24,45,46 and 47) |  | 11,985,735 | 10,461,822
Inventories, net (Note 14) |  | 8,875,615 | 9,930,732
Income tax receivables (Note 41) |  | 69,612 | 46,619
Current non-financial assets (Note 15) |  | 1,109,321 | 1,744,869
Assets held-for-sale (Note 16 and 42) |  | 45,648 | 44,748
Total current assets |  | 29,536,215 | 29,750,545
Non-current assets |  |  |
Non-current financial assets, net (Notes 5,6,9,10,11,12,13,45 and 47) |  | 3,546,214 | 3,336,835
Non-current trade and other receivables, net (Notes 5,8,20,45,46 and 47) |  | 2,193,587 | 2,153,080
Property, plant and equipment, net (Notes 4,18,24,27 and 49) |  | 179,875,535 | 177,865,308
Investment properties, net (Notes 4,19 and 27) |  | 185,527 | 208,286
Goodwill (Note 4 and 16) |  | 99,156 | 100,093
Intangible assets other than goodwill, net (Notes 4,21,27 and 46) |  | 1,033,984 | 956,664
Investments in associates (Notes 4 and 17) |  | 6,176,889 | 5,844,464
Investments in joint ventures (Notes 4 and 17) |  | 3,485,699 | 3,147,584
Defined benefit assets, net (Note 25) |  | 70,187 | 198,626
Deferred tax assets (Note 41) |  | 13,161,802 | 10,934,375
Non-current non-financial assets (Note 4 and 15) |  | 350,170 | 309,134
Total non-current assets |  | 210,178,750 | 205,054,449
Total Assets (Note 4) |  | 239,714,965 | 234,804,994
Current liabilities |  |  |
Trade and other payables, net (Notes 5,22,24,45 and 47) |  | 9,089,973 | 11,983,549
Current financial liabilities, net (Notes 5,12,23,45 and 47) |  | 41,139,726 | 22,703,996
Income tax payables (Note 41) |  | 482,934 | 429,604
Current non-financial liabilities (Notes 20,28 and 29) |  | 7,881,663 | 6,974,377
Current provisions (Notes 26 and 45) |  | 2,654,125 | 2,427,051
Total current liabilities |  | 61,248,421 | 44,518,577
Non-current liabilities |  |  |
Non-current trade and other payables, net (Notes 5,22,24,45 and 47) |  | 4,981,957 | 5,638,914
Non-current financial liabilities, net (Notes 5,12,23,45 and 47) |  | 92,944,338 | 98,334,120
Non-current non-financial liabilities (Notes 28 and 29) |  | 11,196,000 | 10,662,661
Employee benefits liabilities, net (Notes 25 and 45) |  | 1,035,320 | 828,721
Deferred tax liabilities (Note 41) |  | 5,163,135 | 6,457,103
Non-current provisions (Notes 26 and 45) |  | 25,881,044 | 26,364,642
Total non-current liabilities |  | 141,201,794 | 148,286,161
Total liabilities (Note 4) |  | 202,450,215 | 192,804,738
Equity |  |  |
Share capital |  | 3,209,820 | 3,209,820
Share premium |  | 843,758 | 843,758
Contributed capital (Notes 1,30 and 45) |  | 4,053,578 | 4,053,578
Legal reserves | [1] | 1,604,910 | 1,604,910
Voluntary reserves |  | 2,812,313 | 27,782,969
Unappropriated retained earnings (undisposed deficit) |  | 11,921,039 | (7,956,579)
Retained earnings (Note 31) |  | 16,338,262 | 21,431,300
Other capital surplus |  | 1,600,801 | 1,268,569
Accumulated other comprehensive income |  | 557,430 | 496,976
Other equity |  | 13,294,972 | 13,294,973
Other components of equity (Note 34) |  | 15,453,203 | 15,060,518
Equity attributable to owners of the controlling company |  | 35,845,043 | 40,545,396
Non-controlling interests (Notes 16 and 33) |  | 1,419,707 | 1,454,860
Total Equity |  | 37,264,750 | 42,000,256
Total Liabilities and Equity |  | ₩ 239,714,965 | ₩ 234,804,994
[1] | The KEPCO Act requires KEPCO to appropriate a legal reserve equal to at least 20 percent of net income for each accounting period until the reserve equals 50 percent of KEPCO’s common stock. The legal reserve is not available for cash dividends; however, this reserve may be credited to paid-in capital or offset against accumulated deficit by the resolution of the shareholders.

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- Definition The amount of property (land or a building - or part of a building - or both) held (by the owner or by the lessee as a right-of-use asset) to earn rentals or for capital appreciation or both, rather than for: (a) use in the production or supply of goods or services or for administrative purposes; or (b) sale in the ordinary course of business. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 40 -IssueDate 2023-01-01 -Paragraph 76 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=40&code=ifrs-tx-2023-en-r&anchor=para_76&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 40 -IssueDate 2023-01-01 -Paragraph 79 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=40&code=ifrs-tx-2023-en-r&anchor=para_79_d&doctype=Standard -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 54 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_54_b&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of investments in joint ventures in an entity's separate financial statements. [Refer: Joint ventures [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2023-01-01 -Paragraph 10 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2023-en-r&anchor=para_10&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The nominal value of capital issued. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 78 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_78_e&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of a present obligation of the entity to transfer an economic resource as a result of past events. Economic resource is a right that has the potential to produce economic benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2023-01-01 -Paragraph 93 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2023-en-r&anchor=para_93_a&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2023-01-01 -Paragraph 93 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2023-en-r&anchor=para_93_b&doctype=Standard -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2023-01-01 -Paragraph 93 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2023-en-r&anchor=para_93_e&doctype=Standard -URIDate 2023-03-23 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2023-01-01 -Paragraph 28 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2023-en-r&anchor=para_28_d&doctype=Standard -URIDate 2023-03-23 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2023-01-01 -Paragraph 23 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2023-en-r&anchor=para_23&doctype=Standard -URIDate 2023-03-23 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of non-current trade payables and non-current other payables. [Refer: Other non-current payables; Non-current trade payables] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 54 -Subparagraph k -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_54_k&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of non-current provisions, including provisions for employee benefits. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 54 -Subparagraph l -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_54_l&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of non-current trade receivables and non-current other receivables. [Refer: Non-current trade receivables; Other non-current receivables] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 54 -Subparagraph h -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_54_h&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 78 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_78_b&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of equity interest of an entity without share capital that the entity does not separately disclose in the same statement or note. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 78 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_78_e&doctype=Standard -URIDate 2023-03-23 + Details
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- References No definition available. + Details
Name: | kep_OtherCapitalSurplus
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Other components of equity. + References No definition available. + Details
Name: | kep_OtherComponentsOfEquity
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Unappropriated retained earnings undisposed deposit. + References No definition available. + Details
Name: | kep_UnappropriatedRetainedEarningsUndisposedDeposit
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | kep_VoluntaryReserves
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant