XML 44 R221.htm IDEA: XBRL DOCUMENT v3.20.1

Changes in Accounting Policies - Summary of quantitative information about lease liabilities (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Disclosure Of Quantitative Information About Lease Liabilities [Abstract]
Operating lease commitments	₩ 675,658
Discounted using the lessee's incremental borrowing rate of at the date of initial application	643,375
Add: finance lease liabilities recognized	163,858
Lease liability recognized	807,233	₩ 807,233	₩ 163,858
Current lease liabilities	336,530	336,530
Non-current lease liabilities	470,703	470,703
Lease liabilities	₩ 807,233	₩ 807,233	₩ 163,858

X

- Definition

The amount of current lease liabilities. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2019-01-01
-Paragraph 47
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_47_b&doctype=Standard
-URIDate 2019-03-27

+ Details

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

X

- Definition

The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2019-01-01
-Paragraph 47
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_47_b&doctype=Standard
-URIDate 2019-03-27

+ Details

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

X

- Definition

The amount of non-current lease liabilities. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2019-01-01
-Paragraph 47
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_47_b&doctype=Standard
-URIDate 2019-03-27

+ Details

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

X

- Definition

Disclosure Of Quantitative Information About Lease Liabilities [Abstract].

+ References

No definition available.

+ Details

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

X

- Definition

Discounted operating lease commitments.

+ References

No definition available.

+ Details

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

X

- Definition

Finance lease liability.

+ References

No definition available.

+ Details

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

X

- Definition

Operating Lease Commitments.

+ References

No definition available.

+ Details

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