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Information About Non-controlling Interests (Tables) | 12 Months Ended
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Dec. 31, 2017
Text block1 [abstract] |
Summary of Changes in Accumulated Non-controlling Interests | Profit or loss allocated to non-controlling interests and accumulated non-controlling interests of subsidiaries that are material to the Group for the years ended December 31, 2015, 2016 and 2017 are as follows:
(In millions of Korean won) |  | 2015 |
| Non- controlling Interests rate(%) |  |  | Accumulated non-controlling interests at the beginning of the year |  |  | Profit or loss allocated to non-controlling interests |  |  | Dividend paid to non- controlling interests |  |  | Others |  |  | Accumulated non-controlling interests at the end of the year |
KT Skylife Co., Ltd. |  |  | 49.73 | % |  | ￦ | 297,300 |  |  | ￦ | 27,032 |  |  | ￦ | (8,325 | ) |  | ￦ | 873 |  |  | ￦ | 316,880 |
BC Card Co., Ltd. |  |  | 30.46 | % |  |  | 292,931 |  |  |  | 62,943 |  |  |  | (22,650 | ) |  |  | (10,303 | ) |  |  | 322,921 |
KT Powertel Co., Ltd. |  |  | 55.15 | % |  |  | 70,231 |  |  |  | (17,880 | ) |  |  | (1,118 | ) |  |  | (307 | ) |  |  | 50,926 |
KT Hitel Co.,Ltd. |  |  | 36.30 | % |  |  | 51,136 |  |  |  | (608 | ) |  |  | — |  |  |  | 161 |  |  |  | 50,689 |
KT Telecop Co., Ltd. |  |  | 13.18 | % |  |  | 104,821 |  |  |  | (1,000 | ) |  |  | — |  |  |  | (393 | ) |  |  | 103,428 |
(In millions of Korean won) |  | 2016 |
| Non- controlling Interests rate(%) |  |  | Accumulated non-controlling interests at the beginning of the year |  |  | Profit or loss allocated to non-controlling interests |  |  | Dividend paid to non- controlling interests |  |  | Others |  |  | Accumulated non-controlling interests at the end of the year |
KT Skylife Co., Ltd. |  |  | 49.73 | % |  | ￦ | 316,880 |  |  | ￦ | 22,445 |  |  | ￦ | (8,279 | ) |  | ￦ | (1,370 | ) |  | ￦ | 329,676 |
BC Card Co., Ltd. |  |  | 30.46 | % |  |  | 322,921 |  |  |  | 47,068 |  |  |  | (44,637 | ) |  |  | 3,986 |  |  |  | 329,338 |
KT Powertel Co., Ltd. |  |  | 55.15 | % |  |  | 50,926 |  |  |  | 112 |  |  |  | — |  |  |  | 713 |  |  |  | 51,751 |
KT Hitel Co.,Ltd. |  |  | 35.27 | % |  |  | 50,689 |  |  |  | 1,274 |  |  |  | — |  |  |  | (165 | ) |  |  | 51,798 |
KT Telecop Co., Ltd. |  |  | 13.18 | % |  |  | 103,428 |  |  |  | 19 |  |  |  | — |  |  |  | 85 |  |  |  | 103,532 |
(In millions of Korean won) |  | 2017 |
| Non- controlling Interests rate(%) |  |  | Accumulated non-controlling interests at the beginning of the year |  |  | Profit or loss allocated to non-controlling interests |  |  | Dividend paid to non- controlling interests |  |  | Others |  |  | Accumulated non-controlling interests at the end of the year |
KT Skylife Co., Ltd. |  |  | 49.73 | % |  | ￦ | 329,676 |  |  | ￦ | 9,395 |  |  | ￦ | (9,817 | ) |  | ￦ | (952 | ) |  | ￦ | 328,302 |
BC Card Co., Ltd. |  |  | 30.46 | % |  |  | 329,338 |  |  |  | 43,961 |  |  |  | (29,490 | ) |  |  | (4,742 | ) |  |  | 339,067 |
KT Powertel Co., Ltd. |  |  | 55.15 | % |  |  | 51,751 |  |  |  | 1,165 |  |  |  | — |  |  |  | 137 |  |  |  | 53,053 |
KT Hitel Co.,Ltd. |  |  | 32.87 | % |  |  | 51,798 |  |  |  | 870 |  |  |  | — |  |  |  | 478 |  |  |  | 53,146 |
KT Telecop Co., Ltd. |  |  | 13.18 | % |  |  | 103,532 |  |  |  | 381 |  |  |  | — |  |  |  | (445 | ) |  |  | 103,468 |
Summary of Financial Information on Subsidiaries | Summarized consolidated statements of financial position as of December 31, 2015, 2016 and 2017, are as follows:
|  | 2015 |
(In millions of Korean won) |  | KT Skylife Co., Ltd. |  |  | BC Card Co., Ltd. |  |  | KT Powertel Co., Ltd. |  |  | KT Hitel Co., Ltd. |  |  | KT Telecop Co., Ltd. |
Non-controlling Interests rate(%) |  |  | 49.73 | % |  |  | 30.46 | % |  |  | 55.15 | % |  |  | 36.30 | % |  |  | 13.18 | %
Current assets |  | ￦ | 279,480 |  |  | ￦ | 2,291,047 |  |  | ￦ | 65,739 |  |  | ￦ | 157,355 |  |  | ￦ | 58,457 |
Non-current assets |  |  | 431,814 |  |  |  | 672,905 |  |  |  | 47,776 |  |  |  | 78,402 |  |  |  | 210,734 |
Current liabilities |  |  | 143,511 |  |  |  | 1,882,363 |  |  |  | 16,016 |  |  |  | 33,656 |  |  |  | 82,353 |
Non-current liabilities |  |  | 74,339 |  |  |  | 63,271 |  |  |  | 5,166 |  |  |  | 282 |  |  |  | 52,613 |
Equity |  |  | 493,444 |  |  |  | 1,018,318 |  |  |  | 92,333 |  |  |  | 201,819 |  |  |  | 134,225 |
Accumulated non-controlling interests |  |  | 316,880 |  |  |  | 322,921 |  |  |  | 50,926 |  |  |  | 50,689 |  |  |  | 103,428 |
Operating revenue |  |  | 668,521 |  |  |  | 3,504,946 |  |  |  | 104,527 |  |  |  | 162,155 |  |  |  | 302,844 |
Profit or loss for the year |  |  | 72,987 |  |  |  | 218,969 |  |  |  | (32,417 | ) |  |  | 7,258 |  |  |  | (7,593 | )
Total comprehensive income |  |  | 73,147 |  |  |  | 188,360 |  |  |  | (32,417 | ) |  |  | 6,769 |  |  |  | (7,593 | )
The profit or loss allocated to non-controlling interests |  |  | 27,032 |  |  |  | 62,943 |  |  |  | (17,880 | ) |  |  | (608 | ) |  |  | (1,000 | )
Cash flows from operating activities |  |  | 157,762 |  |  |  | 128,927 |  |  |  | (12,016 | ) |  |  | 22,556 |  |  |  | 36,216 |
Cash flows from investing activities |  |  | (92,350 | ) |  |  | 73,118 |  |  |  | 10,691 |  |  |  | (19,949 | ) |  |  | (91,846 | )
Cash flows from financing activities before dividend paid to non-controlling interests |  |  | (35,984 | ) |  |  | (75,121 | ) |  |  | (2,015 | ) |  |  | — |  |  |  | (32,491 | )
Dividend paid to non-controlling interests |  |  | (8,325 | ) |  |  | (22,650 | ) |  |  | (1,118 | ) |  |  | — |  |  |  | — |
Net (decrease)/increase in cash and cash equivalents |  |  | 29,428 |  |  |  | 126,924 |  |  |  | (3,340 | ) |  |  | 2,607 |  |  |  | (88,121 | )
|  | 2016 |
(In millions of Korean won) |  | KT Skylife Co., Ltd. |  |  | BC Card Co., Ltd. |  |  | KT Powertel Co., Ltd. |  |  | KT Hitel Co., Ltd. |  |  | KT Telecop Co., Ltd. |
Non-controlling Interests rate(%) |  |  | 49.73 | % |  |  | 30.46 | % |  |  | 55.15 | % |  |  | 35.27 | % |  |  | 13.18 | %
Current assets |  | ￦ | 352,980 |  |  | ￦ | 2,945,584 |  |  | ￦ | 69,046 |  |  | ￦ | 158,210 |  |  | ￦ | 63,802 |
Non-current assets |  |  | 424,968 |  |  |  | 705,480 |  |  |  | 44,679 |  |  |  | 90,992 |  |  |  | 201,751 |
Current liabilities |  |  | 151,329 |  |  |  | 2,530,832 |  |  |  | 17,910 |  |  |  | 45,277 |  |  |  | 53,903 |
Non-current liabilities |  |  | 80,123 |  |  |  | 71,571 |  |  |  | 1,989 |  |  |  | 1,664 |  |  |  | 78,441 |
Equity |  |  | 546,496 |  |  |  | 1,048,661 |  |  |  | 93,826 |  |  |  | 202,261 |  |  |  | 133,209 |
Accumulated non-controlling interests |  |  | 329,676 |  |  |  | 329,338 |  |  |  | 51,751 |  |  |  | 51,798 |  |  |  | 103,532 |
Operating revenue |  |  | 668,945 |  |  |  | 3,567,512 |  |  |  | 81,390 |  |  |  | 198,994 |  |  |  | 315,948 |
Profit or loss for the year |  |  | 68,863 |  |  |  | 163,131 |  |  |  | 202 |  |  |  | 4,298 |  |  |  | 143 |
Total comprehensive income |  |  | 68,785 |  |  |  | 178,744 |  |  |  | 202 |  |  |  | 1,399 |  |  |  | 143 |
The profit or loss allocated to non-controlling interests |  |  | 22,445 |  |  |  | 47,068 |  |  |  | 112 |  |  |  | 1,274 |  |  |  | 19 |
Cash flows from operating activities |  |  | 155,399 |  |  |  | 92,818 |  |  |  | 7,271 |  |  |  | 28,987 |  |  |  | 60,461 |
Cash flows from investing activities |  |  | (210,480 | ) |  |  | (37,313 | ) |  |  | (8,191 | ) |  |  | (33,238 | ) |  |  | (45,243 | )
Cash flows from financing activities before dividend paid to non-controlling interests |  |  | (16,647 | ) |  |  | (147,306 | ) |  |  | — |  |  |  | — |  |  |  | — |
Dividend paid to non-controlling interests |  |  | (8,279 | ) |  |  | (44,637 | ) |  |  | — |  |  |  | — |  |  |  | — |
Gain or loss foreign currency translation |  |  | — |  |  |  | (178 | ) |  |  | — |  |  |  | 3 |  |  |  | — |
Net (decrease)/increase in cash and cash equivalents |  |  | (71,728 | ) |  |  | (91,801 | ) |  |  | (920 | ) |  |  | (4,251 | ) |  |  | 15,218 |
|  | 2017 |
(In millions of Korean won) |  | KT Skylife Co., Ltd. |  |  | BC Card Co., Ltd. |  |  | KT Powertel Co., Ltd. |  |  | KT Hitel Co., Ltd. |  |  | KT Telecop Co., Ltd. |
Non-controlling Interests rate(%) |  |  | 49.73 | % |  |  | 30.46 | % |  |  | 55.15 | % |  |  | 32.87 | % |  |  | 13.18 | %
Current assets |  | ￦ | 324,632 |  |  | ￦ | 3,225,262 |  |  | ￦ | 73,527 |  |  | ￦ | 150,368 |  |  | ￦ | 73,023 |
Non-current assets |  |  | 468,261 |  |  |  | 823,001 |  |  |  | 41,598 |  |  |  | 107,872 |  |  |  | 191,330 |
Current liabilities |  |  | 185,995 |  |  |  | 2,868,669 |  |  |  | 18,450 |  |  |  | 49,922 |  |  |  | 90,569 |
Non-current liabilities |  |  | 24,555 |  |  |  | 86,369 |  |  |  | 487 |  |  |  | 3,021 |  |  |  | 41,064 |
Equity |  |  | 582,343 |  |  |  | 1,093,225 |  |  |  | 96,188 |  |  |  | 205,297 |  |  |  | 132,720 |
Accumulated non-controlling interests |  |  | 328,302 |  |  |  | 339,067 |  |  |  | 53,053 |  |  |  | 53,146 |  |  |  | 103,468 |
Operating revenue |  |  | 687,752 |  |  |  | 3,628,995 |  |  |  | 69,234 |  |  |  | 227,884 |  |  |  | 317,591 |
Profit or loss for the year |  |  | 57,314 |  |  |  | 156,109 |  |  |  | 2,112 |  |  |  | 3,225 |  |  |  | 2,885 |
Total comprehensive income |  |  | 55,586 |  |  |  | 141,719 |  |  |  | 2,362 |  |  |  | 3,036 |  |  |  | (490 | )
The profit or loss allocated to non-controlling interests |  |  | 9,395 |  |  |  | 43,961 |  |  |  | 1,165 |  |  |  | 870 |  |  |  | 381 |
Cash flows from operating activities |  |  | 99,269 |  |  |  | 108,203 |  |  |  | 13,895 |  |  |  | 28,320 |  |  |  | 57,262 |
Cash flows from investing activities |  |  | (81,758 | ) |  |  | (568,518 | ) |  |  | (17,354 | ) |  |  | (36,086 | ) |  |  | (43,483 | )
Cash flows from financing activities before dividend paid to non-controlling interests |  |  | (19,739 | ) |  |  | (97,221 | ) |  |  | — |  |  |  | — |  |  |  | — |
Dividend paid to non-controlling interests |  |  | (9,817 | ) |  |  | (29,490 | ) |  |  | — |  |  |  | — |  |  |  | — |
Gain or loss foreign currency translation |  |  | — |  |  |  | (184 | ) |  |  | — |  |  |  | (47 | ) |  |  | — |
Net (decrease)/increase in cash and cash equivalents |  |  | (2,228 | ) |  |  | (557,536 | ) |  |  | (3,459 | ) |  |  | (7,766 | ) |  |  | 13,779 |
Summary of Changes in Ownership Interest on the Equity Attributable to Owners | The effect of changes in the ownership interest on the equity attributable to owners of the Group during 2015, 2016 and 2017 is summarized as follows:
(in millions of Korean won) |  | 2015 |  |  | 2016 |  |  | 2017 |
Carrying amount of non-controlling interests acquired |  | ￦ | — |  |  | ￦ | 4,022 |  |  | ￦ | (732 | )
Consideration paid to non-controlling interests |  |  | 2,699 |  |  |  | 7,347 |  |  |  | 6,173 |
Excess of consideration paid recognized in parent’s equity |  | ￦ | 2,699 |  |  | ￦ | 11,369 |  |  | ￦ | 5,441 |

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- Definition The disclosure of a schedule that shows the effects of any changes in the parent's ownership interest in a subsidiary that do not result in a loss of control on the equity attributable to owners of the parent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2017-01-01 -Paragraph 18 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_18&doctype=Standard -URIDate 2017-03-09 + Details
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