XML 90 R75.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Changes in Liabilities Arising from Financing Activities (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Text block1 [abstract] |
Summary of Changes in Liabilities Arising from Financial Activities | Changes in liabilities arising from financial activities for the periods ended December 31, 2017, are as follows:
(in millions of Korean won) |  | 2017 |
| Beginning |  |  | Cash flows |  |  | Non-cash |  |  | Ending |
|  |  | Newly acquired |  |  | Exchange difference |  |  | Fair value change |  |  | Other changes |  |  |  |
Borrowing |  | ￦ | 8,120,791 |  |  | ￦ | (1,163,917 | ) |  | ￦ | — |  |  | ￦ | (221,495 | ) |  | ￦ | — |  |  | ￦ | (51,717 | ) |  | ￦ | 6,683,662 |
Financial lease liabilities |  |  | 180,714 |  |  |  | (71,735 | ) |  |  | 68,938 |  |  |  | — |  |  |  | — |  |  |  | (1,039 | ) |  |  | 176,878 |
Derivative assets |  |  | 227,318 |  |  |  | (71,370 | ) |  |  | — |  |  |  | (76,552 | ) |  |  | 2,687 |  |  |  | (74,694 | ) |  |  | 7,389 |
Derivative liabilities |  |  | 16,901 |  |  |  | — |  |  |  | — |  |  |  | 130,674 |  |  |  | (28,015 | ) |  |  | (20,740 | ) |  |  | 98,820 |
Total |  | ￦ | 8,545,724 |  |  | ￦ | (1,307,022 | ) |  | ￦ | 68,938 |  |  | ￦ | (167,373 | ) |  | ￦ | (25,328 | ) |  | ￦ | (148,190 | ) |  | ￦ | 6,966,749 |

X
- Definition Disclosure of detailed information about reconciliation of liabilities arising from financing activities. + References No definition available. + Details
Name: | kt_DisclosureOfDetailedInformationAboutReconciliationOfLiabilitiesArisingFromFinancingActivitiesExplanatory
Namespace Prefix: | kt_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Text block1 [abstract] + References No definition available. + Details
Name: | kt_TextBlock1Abstract
Namespace Prefix: | kt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration