XML 206 R191.htm IDEA: XBRL DOCUMENT v3.8.0.1

Related Party Transactions - Summary of Significant Transactions with Related Parties (Parenthetical) (Detail) ₩ in Millions	12 Months Ended
	Dec. 31, 2015 KRW (₩)
KT Rental Co., Ltd. and KT Capital Co., Ltd. [member]
Disclosure of transactions between related parties [Line Items]
Operating income discontinued operations	₩ 6,634

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

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

X

- Definition

Operating income discontinued operations.

+ References

No definition available.

+ Details

Name:	kt_OperatingIncomeDiscontinuedOperations
Namespace Prefix:	kt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=kt_KtCapitalCompanyLimitedAndKtRentalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: