XML 179 R167.htm IDEA: XBRL DOCUMENT
v3.23.1

Retained Earnings - Summary of Retained Earnings (Detail) - KRW (₩) ₩ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Miscellaneous equity [abstract] |  |
Legal reserve | ₩ 782,249 | ₩ 782,249
Voluntary reserves | 4,651,362 | 4,651,362
Unappropriated retained earnings | 8,821,705 | 7,853,779
Total | ₩ 14,255,316 | ₩ 13,287,390

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

X
- Definition A component of equity representing the entity's cumulative undistributed earnings or deficit. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph IG6 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_IG6&doctype=Implementation%20Guidance -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 78 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_78_e&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_RetainedEarnings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Retained earnings transferred to legal reserves. + References No definition available. + Details
Name: | kt_RetainedEarningsTransferredToLegalReserves
Namespace Prefix: | kt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Unappropriated retained earnings. + References No definition available. + Details
Name: | kt_UnappropriatedRetainedEarnings
Namespace Prefix: | kt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Voluntary reserves. + References No definition available. + Details
Name: | kt_VoluntaryReserves
Namespace Prefix: | kt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant