XML 231 R218.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Fair Value - Summary of Fair Value Non of Financial Instruments (Detail) - KRW (₩) ₩ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | ₩ 8,171,407 | ₩ 8,263,049
Non financial liabilities | 10,140,198 | 9,580,827
Level 1 [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | 1,244,847 | 1,032,547
Level 2 [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | 437,533 | 750,144
Non financial liabilities | 10,005,637 | 9,439,547
Level 3 [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | 6,489,027 | 6,480,358
Non financial liabilities | 134,561 | 141,280
Financial assets at fair value through other comprehensive income [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | 116,198 | 129,124
Financial assets at fair value through other comprehensive income [member] | Level 1 [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | 0 |
Financial assets at fair value through other comprehensive income [member] | Level 2 [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | 116,198 | 129,124
Financial assets at fair value through other comprehensive income [member] | Level 3 [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | 0 |
Financial assets at fair value through profit or loss [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | 939,661 | 1,064,856
Financial assets at fair value through profit or loss [member] | Level 1 [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | 13,911 | 26,647
Financial assets at fair value through profit or loss [member] | Level 2 [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | 156,918 | 426,140
Financial assets at fair value through profit or loss [member] | Level 3 [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | 768,832 | 612,069
Other financial assets at fair value through other comprehensive income [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | 1,680,168 | 1,508,192
Other financial assets at fair value through other comprehensive income [member] | Level 1 [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | 1,230,936 | 1,005,900
Other financial assets at fair value through other comprehensive income [member] | Level 2 [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | 5,206 | 5,163
Other financial assets at fair value through other comprehensive income [member] | Level 3 [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | 444,026 | 497,129
Derivative financial assets for hedging [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | 159,211 | 190,830
Derivative financial assets for hedging [member] | Level 2 [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | 159,211 | 189,717
Derivative financial assets for hedging [member] | Level 3 [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | 0 | 1,113
Investment Properties [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | 5,276,169 | 5,370,047
Investment Properties [member] | Level 3 [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial assets | 5,276,169 | 5,370,047
Borrowings [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial liabilities | 9,979,545 | 9,405,992
Borrowings [Member] | Level 2 [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial liabilities | 9,979,545 | 9,405,992
Other financial liabilities at fair value through profit or loss [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial liabilities | 136,106 | 141,280
Other financial liabilities at fair value through profit or loss [member] | Level 2 [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial liabilities | 1,545 | 0
Other financial liabilities at fair value through profit or loss [member] | Level 3 [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial liabilities | 134,561 | 141,280
Derivative financial liabilities for hedging purpose [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial liabilities | 24,547 | 33,555
Derivative financial liabilities for hedging purpose [member] | Level 2 [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non financial liabilities | ₩ 24,547 | ₩ 33,555

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

X
- Definition The amount of non-current financial assets. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_25&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_NoncurrentFinancialAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of non-current financial liabilities. [Refer: Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_25&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_NoncurrentFinancialLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level1OfFairValueHierarchyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level2OfFairValueHierarchyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level3OfFairValueHierarchyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=kt_FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=kt_OtherFinancialAssetsAtFairValueThroughProfitOrLossMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=kt_OtherFinancialAssetsAtFairValueThroughOtherComprehensiveIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=kt_OtherDerivativeFinancialAssetsForHedgingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=kt_InvestmentPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=kt_BorrowingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=kt_OtherFinancialLiabilitiesAtFairValueThroughProfitOrLossMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=kt_OtherDerivativeFinancialLiabilitiesForHedgingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |