XML 241 R229.htm IDEA: XBRL DOCUMENT v3.19.1

Business Combination - Schedule of Cash Outflows as a Result of Acquisition (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2018	Mar. 31, 2018
SG Safety Corporation [member]
Disclosure of detailed information about business combination [Line Items]
Purchase considerations	₩ 27,544	₩ 27,570

X

- Definition

The fair value, at acquisition date, of the consideration transferred in a business combination. [Refer: Business combinations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2018-01-01
-Paragraph B64
-Subparagraph f
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2018-03-01&anchor=para_B64_f&doctype=Appendix&seq=2
-URIDate 2018-03-16

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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

X

- Details

Name:	ifrs-full_BusinessCombinationsAxis=kt_SGSafetyCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: