XML 189 R176.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Revenue from Contracts with Customers, Other Income and Relevant Contract Assets and Liabilities - Additional Information (Detail) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of disaggregation of revenue from contracts with customers [abstract] |  |  |
Operating expenses | ₩ 1,759,586 | ₩ 1,793,013 | ₩ 1,842,621

X
- References No definition available. + Details
Name: | ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Operating expenses related to contract cost assets + References No definition available. + Details
Name: | kt_OperatingExpensesRelatedToContractCostAssets
Namespace Prefix: | kt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration