XML 171 R158.htm IDEA: XBRL DOCUMENT v3.24.1.u1

Leases - Additional Information (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure Of Arrangement Involving Legal Form Of Lease [Abstract]
Cash outflow for leases	₩ 500,392	₩ 464,337	₩ 468,360
Increase decrease in right of use assets	₩ 440,552	₩ 405,453

X

- Definition

The cash outflow for leases.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2023-01-01
-Paragraph 53
-Subparagraph g
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_53_g&doctype=Standard
-URIDate 2023-03-23

+ Details

Name:	ifrs-full_CashOutflowForLeases
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Disclosure Of arrangement involving legal form of lease.

+ References

No definition available.

+ Details

Name:	kt_DisclosureOfArrangementInvolvingLegalFormOfLeaseAbstract
Namespace Prefix:	kt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Increase Decrease In Right Of Use Assets

+ References

No definition available.

+ Details

Name:	kt_IncreaseDecreaseInRightOfUseAssets
Namespace Prefix:	kt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration