XML 141 R128.htm IDEA: XBRL DOCUMENT v3.24.1.u1

Investments in Associates and Joint Ventures - Additional Information (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of associates [abstract]
Loss from associates and joint ventures not recognized	₩ 833	₩ 909	₩ 717
Accumulated comprehensive loss of associates and joint ventures not recognized	₩ 10,748	₩ 9,915

X

- References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The cumulative amount of the unrecognised share of losses of associates and joint ventures if the entity has stopped recognising its share of losses when applying the equity method.

+ References

No definition available.

+ Details

Name:	kt_CumulativeUnrecognisedShareOfLossesOfAssociatesAndJointVentures
Namespace Prefix:	kt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of the unrecognised share of associate and joint venture losses if the entity has stopped recognising its share of losses when applying the equity method.

+ References

No definition available.

+ Details

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