XML 234 R218.htm IDEA: XBRL DOCUMENT
v3.21.1

Maturity analysis for non-derivative financial assets (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Disclosure of maturity analysis for financial assets held for managing liquidity risk [Line Items] |  |  |  |  |
Cash and cash equivalents |  | ₩ 2,029,584 | ₩ 1,810,129 | ₩ 1,358,345 | ₩ 2,369,739
Financial assets at fair value through other comprehensive income |  | 358,559 | 379,170 |  |
Financial assets at amortised cost |  | 14,422 | 13,609 |  |
Loans and receivables |  | 821,094 | 774,772 |  |
Long-term/short-term financial instruments |  | 2,062,103 | 1,960,227 |  |
Financial assets at fair value through profit or loss |  | 1,881,382 | 747,261 |  |
Trade and other receivables |  | 9,784,899 | 9,711,107 |  |
Financial assets held for managing liquidity risk |  | 16,952,043 | 15,396,275 |  |
Less than 1 year |  |  |  |  |
Disclosure of maturity analysis for financial assets held for managing liquidity risk [Line Items] |  |  |  |  |
Cash and cash equivalents |  | 2,029,584 | 1,810,129 |  |
Financial assets at fair value through other comprehensive income |  | 0 | 0 |  |
Financial assets at amortised cost |  | 13,149 | 12,302 |  |
Loans and receivables |  | 78,805 | 64,081 |  |
Long-term/short-term financial instruments |  | 1,483,482 | 1,351,971 |  |
Financial assets at fair value through profit or loss |  | 1,196,101 | 131,385 |  |
Trade and other receivables |  | 7,920,005 | 7,703,746 |  |
Financial assets held for managing liquidity risk |  | 12,721,126 | 11,073,614 |  |
1~5 Years |  |  |  |  |
Disclosure of maturity analysis for financial assets held for managing liquidity risk [Line Items] |  |  |  |  |
Cash and cash equivalents |  | 0 | 0 |  |
Financial assets at fair value through other comprehensive income |  | 0 | 0 |  |
Financial assets at amortised cost |  | 1,265 | 1,307 |  |
Loans and receivables |  | 385,571 | 346,583 |  |
Long-term/short-term financial instruments |  | 252,349 | 269,863 |  |
Financial assets at fair value through profit or loss |  | 0 | 79 |  |
Trade and other receivables |  | 1,160,400 | 980,951 |  |
Financial assets held for managing liquidity risk |  | 1,799,585 | 1,598,783 |  |
More than 5 years |  |  |  |  |
Disclosure of maturity analysis for financial assets held for managing liquidity risk [Line Items] |  |  |  |  |
Cash and cash equivalents |  | 0 | 0 |  |
Financial assets at fair value through other comprehensive income |  | 0 | 0 |  |
Financial assets at amortised cost |  | 8 | 0 |  |
Loans and receivables |  | 325,212 | 336,502 |  |
Long-term/short-term financial instruments |  | 386 | 0 |  |
Financial assets at fair value through profit or loss |  | 2,690 | 0 |  |
Trade and other receivables |  | 704,494 | 818,431 |  |
Financial assets held for managing liquidity risk |  | 1,032,790 | 1,154,933 |  |
Other |  |  |  |  |
Disclosure of maturity analysis for financial assets held for managing liquidity risk [Line Items] |  |  |  |  |
Cash and cash equivalents | [1] | 0 | 0 |  |
Financial assets at fair value through other comprehensive income | [1] | 358,559 | 379,170 |  |
Financial assets at amortised cost | [1] | 0 | 0 |  |
Loans and receivables | [1] | 31,506 | 27,606 |  |
Long-term/short-term financial instruments | [1] | 325,886 | 338,393 |  |
Financial assets at fair value through profit or loss | [1] | 682,591 | 615,797 |  |
Trade and other receivables | [1] | 0 | 207,979 |  |
Financial assets held for managing liquidity risk | [1] | ₩ 1,398,542 | ₩ 1,568,945 |  |
[1] | The maturities cannot be presently determined.

X
- Definition The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2020-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_45&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph B13 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_B13_a&doctype=Appendix&subtype=B -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_i&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_CashAndCashEquivalents
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_DisclosureOfMaturityAnalysisForFinancialAssetsHeldForManagingLiquidityRiskLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of financial assets at amortised cost. The amortised cost is the amount at which financial assets are measured at initial recognition minus principal repayments, plus or minus the cumulative amortisation using the effective interest method of any difference between that initial amount and the maturity amount, and adjusted for any impairment. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 8 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_8_f&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_FinancialAssetsAtAmortisedCost
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of financial assets that are measured at fair value and for which gains (losses) are recognised in profit or loss. A financial asset shall be measured at fair value through profit or loss unless it is measured at amortised cost or at fair value through other comprehensive income. A gain (loss) on a financial asset measured at fair value shall be recognised in profit or loss unless it is part of a hedging relationship, it is an investment in an equity instrument for which the entity has elected to present gains and losses in other comprehensive income or it is a financial asset measured at fair value through other comprehensive income. [Refer: At fair value [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 8 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_8_a&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLoss
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of financial assets held for managing liquidity risk (for example, financial assets that are readily saleable or expected to generate cash inflows to meet cash outflows on financial liabilities). [Refer: Liquidity risk [member]; Financial assets; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph B11E -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_B11E&doctype=Appendix&subtype=B -URIDate 2020-01-01 + Details
Name: | ifrs-full_FinancialAssetsHeldForManagingLiquidityRisk
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of financial assets that are measured at fair value through other comprehensive income. A financial asset shall be measured at fair value through other comprehensive income if both of the following conditions are met: (a) the financial asset is held within a business model whose objective is achieved by both collecting contractual cash flows and selling financial assets and (b) the contractual terms of the financial asset give rise on specified dates to cash flows that are solely payments of principal and interest on the principal amount outstanding. [Refer: At fair value [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 8 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_8_h&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_FinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

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

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanFiveYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=kep_CannotBePresentlyDeterminedMaturityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |