XML 152 R139.htm IDEA: XBRL DOCUMENT
v3.25.1

Borrowings - Summary of Long-term Borrowings (Parenthetical) (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2024
Disclosure of detailed information about borrowings [line items] |
Long term debt repayment | The above Inter-Korean Cooperation Fund is repayable in installments over 13 years after a 7-year grace period.
Vessel facility loans [member] | Shinhan Bank [member] |
Disclosure of detailed information about borrowings [line items] |
LIBOR rate | 4.692%
Vessel facility loans [member] | Woori Bank [Member] |
Disclosure of detailed information about borrowings [line items] |
LIBOR rate | 2.714%
Vessel facility loans [member] | NH Jayang [Member] |
Disclosure of detailed information about borrowings [line items] |
LIBOR rate | 3.40%

X
- Definition The adjustment to the basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 7 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_7&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_BorrowingsAdjustmentToInterestRateBasis
Namespace Prefix: | ifrs-full_
Data Type: | dtr-2022:percentItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition Long term debt repayment description. + References No definition available. + Details
Name: | kt_LongTermDebtRepaymentDescription
Namespace Prefix: | kt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | ifrs-full_CounterpartiesAxis=kt_ShinhanBankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=kt_WooriBankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=kt_NhJayangMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |