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Leases - Summary of Details of Future Minimum Lease Payments under Finance Lease Contracts (Detail) ₩ in Millions | Dec. 31, 2018 KRW (₩)
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Disclosure of finance lease and operating lease by lessee [Line Items] |
Total amount of minimum lease payments | ₩ 202,192
Unrealized interest expense | 38,334
Net amount of minimum lease payments | 163,858
Less than 1 year [member] |
Disclosure of finance lease and operating lease by lessee [Line Items] |
Total amount of minimum lease payments | 77,615
Net amount of minimum lease payments | 59,324
1-5 years [member] |
Disclosure of finance lease and operating lease by lessee [Line Items] |
Total amount of minimum lease payments | 124,498
Net amount of minimum lease payments | 104,456
More than 5 years [member] |
Disclosure of finance lease and operating lease by lessee [Line Items] |
Total amount of minimum lease payments | 79
Net amount of minimum lease payments | ₩ 78

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- 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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Balance Type: | na
Period Type: | duration

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- Definition The amount of undiscounted finance lease payments to be received. Finance lease is a lease that transfers substantially all the risks and rewards incidental to ownership of an underlying asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 94 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_94&doctype=Standard -URIDate 2019-03-27 + Details
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Balance Type: | debit
Period Type: | instant

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- Definition Future finance charges on finance lease. + References No definition available. + Details
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Balance Type: | credit
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- Definition Minimum finance lease payment payable at present value. + References No definition available. + Details
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Namespace Prefix: | kt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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- Details
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- Details
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