XML 169 R157.htm IDEA: XBRL DOCUMENT v3.19.1

Commitments and Contingencies - Additional Information (Detail) ₩ in Millions	12 Months Ended
	Dec. 31, 2018 KRW (₩) Lawsuits	Dec. 31, 2017 KRW (₩)
Commitments and contingencies [abstract]
Severally liable for reimbursement	₩ 3,480
Number of lawsuits | Lawsuits	172
Litigation settlement claim amount	₩ 169,246	₩ 112,639
Litigation provision	58,776
Collaterally guarantees the debt	₩ 6,000
New town development consortium percentage of ownership interest	2.50%
Contract amount not yet recognized as liabilities	₩ 1,474,009	₩ 622,059

X

- Definition

The amount expected to be reimbursed by another party on expenditures to settle other provisions. [Refer: Other provisions]

+ References

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-Name IAS
-Number 37
-IssueDate 2018-01-01
-Paragraph 85
-Subparagraph c
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-URIDate 2018-03-16

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Balance Type:	debit
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X

- Definition

The amount of provision for legal proceedings. [Refer: Other provisions]

+ References

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-Name IAS
-Number 37
-IssueDate 2018-01-01
-Section Example 10 A court case
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-URIDate 2018-03-16

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X

- Definition

The amount of guarantees or collateral provided by the entity in related party transactions. [Refer: Guarantees [member]; Related parties [member]]

+ References

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-Number 24
-IssueDate 2018-01-01
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-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2018-03-01&anchor=para_21_h&doctype=Standard
-URIDate 2018-03-16

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Period Type:	duration

X

- Definition

Acquisition contract agreement not yet recognized as liabilities.

+ References

No definition available.

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Balance Type:	credit
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- Definition

Commitments and contingencies [abstract]

+ References

No definition available.

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Namespace Prefix:	kt_
Data Type:	xbrli:stringItemType
Balance Type:	na
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X

- Definition

Guarantee interest percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	kt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Litigation settlements claim amount.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Number of law suits faced.

+ References

No definition available.

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Period Type:	duration