XML 186 R173.htm IDEA: XBRL DOCUMENT
v3.25.1

Share-based Payments - Additional information (Detail) |  | 12 Months Ended
--- | --- | ---
Sep. 09, 2024 shares ₩ / shares | Dec. 31, 2024 | Dec. 31, 2023
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted in share-based payment arrangement |  | 226,327 | 307,182
Percentage of granted shares will vest | 50.00% |  |
Additional percentage of granted shares will vest | 50.00% |  |
Restricted share units [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted in share-based payment arrangement | shares | 766 |  |
Weighted average share price, share options granted | ₩ / shares | ₩ 39,100 |  |

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

X
- Definition The number of share options granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2024-01-01 -Paragraph 45 -Subparagraph b -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_45_b_ii&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average share price used as input to the option pricing model to calculate the fair value of share options granted. [Refer: Option pricing model [member]; Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2024-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_47_a_i&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019
Namespace Prefix: | ifrs-full_
Data Type: | dtr-2022:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Additional percentage of granted shares will vest . + References No definition available. + Details
Name: | kt_AdditionalPercentageOfGrantedSharesWillVest
Namespace Prefix: | kt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of granted shares will vest. + References No definition available. + Details
Name: | kt_PercentageOfGrantedSharesWillVest
Namespace Prefix: | kt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ifrs-full_TypesOfAntidilutiveInstrumentsAxis=ifrs-full_RestrictedShareUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |