XML 241 R228.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Events After the Reporting Period - Summary of Public Bonds Issued After Reporting Period (Detail) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 KRW (₩)
Disclosure of non-adjusting events after reporting period [line items] |
Annual interest rates | 0.00%
Gross carrying amount [member] | The 200-1st Public bond [member] |
Disclosure of non-adjusting events after reporting period [line items] |
Issued Date | Feb. 27, 2024
Annual interest rates | 3.552%
Maturity | Feb. 27, 2026
Carrying amount | ₩ 120,000
Gross carrying amount [member] | The 200-2nd Public bond [member] |
Disclosure of non-adjusting events after reporting period [line items] |
Issued Date | Feb. 27, 2024
Annual interest rates | 3.608%
Maturity | Feb. 26, 2027
Carrying amount | ₩ 200,000
Gross carrying amount [member] | The 200-3rd Public bond [member] |
Disclosure of non-adjusting events after reporting period [line items] |
Issued Date | Feb. 27, 2024
Annual interest rates | 3.548%
Maturity | Feb. 27, 2029
Carrying amount | ₩ 80,000

X
- Definition The amount of bonds issued by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_112_c&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_BondsIssued
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 7 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_7&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_BorrowingsInterestRate
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The maturity of borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 7 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_7&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_BorrowingsMaturity
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 members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public bond issue date. + References No definition available. + Details
Name: | kt_PublicBondIssueDate
Namespace Prefix: | kt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis=ifrs-full_GrossCarryingAmountMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=kt_The200FirstPublicBondMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=kt_The200SecondPublicBondMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=kt_The200ThirdPublicBondMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |