XML 37 R22.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Provisions | 12 Months Ended
--- | ---
Dec. 31, 2017
Text block1 [abstract] |
Provisions |
16. | Provisions
Changes in provisions for the years ended December 31, 2016 and 2017, are as follows:
|  | 2016 |
(In millions of Korean won) |  | Litigation |  |  | Restoration cost |  |  | Others |  |  | Total |
Beginning balance |  | ￦ | 17,524 |  |  | ￦ | 91,827 |  |  | ￦ | 85,921 |  |  | ￦ | 195,272 |
Increase (transfer) |  |  | 3,392 |  |  |  | 13,653 |  |  |  | 40,293 |  |  |  | 57,338 |
Usage |  |  | (640 | ) |  |  | (3,378 | ) |  |  | (37,378 | ) |  |  | (41,396 | )
Reversal |  |  | (1,238 | ) |  |  | (790 | ) |  |  | (12,007 | ) |  |  | (14,035 | )
Ending balance |  | ￦ | 19,038 |  |  | ￦ | 101,312 |  |  | ￦ | 76,829 |  |  | ￦ | 197,179 |
Current |  |  | 18,988 |  |  |  | 2,334 |  |  |  | 75,163 |  |  |  | 96,485 |
Non-current |  |  | 50 |  |  |  | 98,978 |  |  |  | 1,666 |  |  |  | 100,694 |
|  | 2017 |
(In millions of Korean won) |  | Litigation |  |  | Restoration cost |  |  | Others |  |  | Total |
Beginning balance |  | ￦ | 19,038 |  |  | ￦ | 101,312 |  |  | ￦ | 76,829 |  |  | ￦ | 197,179 |
Increase (Transfer) |  |  | 3,842 |  |  |  | 2,827 |  |  |  | 41,550 |  |  |  | 48,219 |
Usage |  |  | (1,740 | ) |  |  | (2,178 | ) |  |  | (22,382 | ) |  |  | (26,300 | )
Reversal |  |  | (2,834 | ) |  |  | (1,723 | ) |  |  | (11,467 | ) |  |  | (16,024 | )
Change in scope of consolidation |  |  | — |  |  |  | (22 | ) |  |  | (22 | ) |  |  | (44 | )
Ending balance |  | ￦ | 18,306 |  |  | ￦ | 100,216, |  |  | ￦ | 84,508 |  |  | ￦ | 203,030 |
Current |  |  | 17,238 |  |  |  | 1,766 |  |  |  | 59,168 |  |  |  | 78,172 |
Non-current |  |  | 1,068 |  |  |  | 98,450 |  |  |  | 25,340 |  |  |  | 124,858 |

X
- Definition Entire disclosure of provision. + References No definition available. + Details
Name: | kt_DisclosureOfProvisionExplanatory
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