XML 225 R213.htm IDEA: XBRL DOCUMENT
v3.23.1

Financial Risk Management - Summary of Contractual Undiscounted Cash Flows (Detail) - KRW (₩) ₩ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Trade and other payables | ₩ 8,483,110 | ₩ 8,090,898
Borrowings(including debentures) | 11,016,756 | 9,838,571
Lease liabilities | 1,336,761 | 1,300,562
Other non-derivative financial liabilities | 336,178 | 309,122
Financial guarantee contracts | 26,206 | 71,697
Total | 21,199,011 | 19,610,850
Less than 1 year [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Trade and other payables | 7,386,703 | 6,698,783
Borrowings(including debentures) | 2,028,207 | 1,927,456
Lease liabilities | 313,162 | 388,226
Other non-derivative financial liabilities | 33,279 | 1,473
Financial guarantee contracts | 21,618 | 71,697
Total | 9,782,969 | 9,087,635
1-5 years [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Trade and other payables | 1,009,559 | 1,232,468
Borrowings(including debentures) | 6,972,077 | 5,635,558
Lease liabilities | 615,766 | 484,476
Other non-derivative financial liabilities | 209,155 | 206,749
Financial guarantee contracts |  |
Total | 8,806,557 | 7,559,251
More than 5 years [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Trade and other payables | 86,848 | 159,647
Borrowings(including debentures) | 2,016,472 | 2,275,557
Lease liabilities | 407,833 | 427,860
Other non-derivative financial liabilities | 93,744 | 100,900
Financial guarantee contracts | 4,588 |
Total | ₩ 2,609,485 | ₩ 2,963,964

X
- Definition The amount of contractual undiscounted cash flows in relation to bank borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph B11D -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_B11D&doctype=Appendix&subtype=B -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph IG31A -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_IG31A&doctype=Implementation%20Guidance -URIDate 2022-03-24 + Details
Name: | ifrs-full_BankBorrowingsUndiscountedCashFlows
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 members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of contractual undiscounted cash flows in relation to lease liabilities before deducting finance charges. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2022-03-24 -Paragraph 58 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2022-en-r&anchor=para_58&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph B11D -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_B11D_a&doctype=Appendix&subtype=B -URIDate 2022-03-24 + Details
Name: | ifrs-full_GrossLeaseLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of contractual undiscounted cash flows in relation to non-derivative financial liabilities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 39 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_39_a&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_NonderivativeFinancialLiabilitiesUndiscountedCashFlows
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of contractual undiscounted cash flows in relation to trade and other payables. [Refer: Trade and other payables] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph B11D -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_B11D&doctype=Appendix&subtype=B -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph IG31A -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_IG31A&doctype=Implementation%20Guidance -URIDate 2022-03-24 + Details
Name: | ifrs-full_TradeAndOtherPayablesUndiscountedCashFlows
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Financial guarantee liabilities undiscounted cash flows + References No definition available. + Details
Name: | kt_FinancialGuaranteeLiabilitiesUndiscountedCashFlows
Namespace Prefix: | kt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Other non-derivative financial liabilities undiscounted cash flows. + References No definition available. + Details
Name: | kt_OtherNonderivativeFinancialLiabilitiesUndiscountedCashFlows
Namespace Prefix: | kt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanFiveYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |