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Information About Non-controlling Interests (Tables) | 12 Months Ended
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Dec. 31, 2020
Text block [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, 2018, 2019 and 2020 are as follows:
(In millions of Korean won) |  | December 31, 2018 |
| 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. |  |  | 49.7 | % |  | ￦ | 328,302 |  |  | ￦ | 23,405 |  |  | ￦ | (8,279 | ) |  | ￦ | 30,722 |  |  | ￦ | 374,150 |
BC Card Co., Ltd. |  |  | 30.5 | % |  |  | 339,067 |  |  |  | 28,418 |  |  |  | (35,924 | ) |  |  | 13,986 |  |  |  | 345,547 |
KT Powertel Co., Ltd. |  |  | 55.2 | % |  |  | 53,053 |  |  |  | (3,058 | ) |  |  | — |  |  |  | 2,870 |  |  |  | 52,865 |
KT Hitel Co.,Ltd. |  |  | 32.9 | % |  |  | 53,146 |  |  |  | 454 |  |  |  | — |  |  |  | (1,264 | ) |  |  | 52,336 |
KT Telecop Co., Ltd. |  |  | 13.2 | % |  |  | 103,468 |  |  |  | 59 |  |  |  | — |  |  |  | (170 | ) |  |  | 103,357 |
(In millions of Korean won) |  | December 31, 2019 |
| 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. |  |  | 49.7 | % |  | ￦ | 374,150 |  |  | ￦ | 10,029 |  |  | ￦ | (8,279 | ) |  | ￦ | 6 |  |  | ￦ | 375,906 |
BC Card Co., Ltd. |  |  | 30.5 | % |  |  | 345,547 |  |  |  | 37,795 |  |  |  | (18,900 | ) |  |  | 53,033 |  |  |  | 417,475 |
KT Powertel Co., Ltd. |  |  | 55.2 | % |  |  | 52,865 |  |  |  | 1,751 |  |  |  | — |  |  |  | (340 | ) |  |  | 54,276 |
KT Hitel Co., Ltd. |  |  | 32.9 | % |  |  | 52,336 |  |  |  | 1,720 |  |  |  | — |  |  |  | 653 |  |  |  | 54,709 |
KT Telecop Co., Ltd. |  |  | 13.2 | % |  |  | 103,357 |  |  |  | (588 | ) |  |  | — |  |  |  | (99,119 | ) |  |  | 3,650 |
(In millions of Korean won) |  | December 31, 2020 |
| 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. |  |  | 49.7 | % |  | ￦ | 375,906 |  |  | ￦ | 22,171 |  |  | ￦ | (8,279 | ) |  | ￦ | (898 | ) |  | ￦ | 388,900 |
BC Card Co., Ltd. |  |  | 30.5 | % |  |  | 417,475 |  |  |  | 9,899 |  |  |  | (22,787 | ) |  |  | 7,239 |  |  |  | 411,826 |
KT Powertel Co., Ltd. |  |  | 55.2 | % |  |  | 54,276 |  |  |  | 2,151 |  |  |  | (478 | ) |  |  | (202 | ) |  |  | 55,747 |
KT Hitel Co., Ltd. |  |  | 32.9 | % |  |  | 54,709 |  |  |  | (1,840 | ) |  |  | — |  |  |  | (2,563 | ) |  |  | 50,306 |
KT Telecop Co., Ltd. |  |  | 13.2 | % |  |  | 3,650 |  |  |  | 152 |  |  |  | — |  |  |  | (208 | ) |  |  | 3,594 |
Summary of Financial Information on Subsidiaries | Summarized consolidated statements of financial position as at December 31, 2018, 2019 and 2020, are as follows:
|  | December 31, 2018 |
(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 (%) |  |  | 49.7 | % |  |  | 30.5 | % |  |  | 55.2 | % |  |  | 32.9 | % |  |  | 13.2 | %
Current assets |  | ￦ | 301,739 |  |  | ￦ | 2,997,429 |  |  | ￦ | 84,785 |  |  | ￦ | 161,162 |  |  | ￦ | 52,367 |
Non-current assets |  |  | 514,263 |  |  |  | 724,950 |  |  |  | 39,279 |  |  |  | 111,546 |  |  |  | 220,125 |
Current liabilities |  |  | 112,411 |  |  |  | 2,520,050 |  |  |  | 27,187 |  |  |  | 63,231 |  |  |  | 85,648 |
Non-current liabilities |  |  | 37,430 |  |  |  | 110,486 |  |  |  | 1,030 |  |  |  | 2,812 |  |  |  | 54,666 |
Equity |  |  | 666,161 |  |  |  | 1,091,843 |  |  |  | 95,847 |  |  |  | 206,665 |  |  |  | 132,178 |
Operating revenue |  |  | 694,059 |  |  |  | 3,551,715 |  |  |  | 65,620 |  |  |  | 279,117 |  |  |  | 328,262 |
Profit or loss for the year |  |  | 52,010 |  |  |  | 70,889 |  |  |  | (5,545 | ) |  |  | 657 |  |  |  | 166 |
Total comprehensive income (loss) |  |  | 47,787 |  |  |  | 116,604 |  |  |  | (5,792 | ) |  |  | 738 |  |  |  | (1,517 | )
Cash flows from operating activities |  |  | 183,474 |  |  |  | 86,299 |  |  |  | 11,603 |  |  |  | 43,855 |  |  |  | 40,351 |
Cash flows from investing activities |  |  | (139,846 | ) |  |  | 128,538 |  |  |  | (2,580 | ) |  |  | (26,335 | ) |  |  | (76,969 | )
Cash flows from financing activities |  |  | (77,647 | ) |  |  | (117,561 | ) |  |  | — |  |  |  | — |  |  |  | 10,000 |
Net increase (decrease) in cash and cash equivalents |  |  | (34,019 | ) |  |  | 97,276 |  |  |  | 9,023 |  |  |  | 17,520 |  |  |  | (26,618 | )
Cash and cash equivalents at beginning of year |  |  | 65,747 |  |  |  | 177,826 |  |  |  | 6,626 |  |  |  | 21,647 |  |  |  | 32,326 |
Exchange differences |  |  | — |  |  |  | (13 | ) |  |  | — |  |  |  | 19 |  |  |  | — |
Cash and cash equivalents at end of year |  |  | 31,728 |  |  |  | 275,089 |  |  |  | 15,649 |  |  |  | 39,186 |  |  |  | 5,708 |
|  | December 31, 2019 |
(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 (%) |  |  | 49.7 | % |  |  | 30.5 | % |  |  | 55.2 | % |  |  | 32.9 | % |  |  | 13.2 | %
Current assets |  | ￦ | 459,077 |  |  | ￦ | 2,580,634 |  |  | ￦ | 86,465 |  |  | ￦ | 115,694 |  |  | ￦ | 55,908 |
Non-current assets |  |  | 389,199 |  |  |  | 1,332,348 |  |  |  | 31,587 |  |  |  | 164,124 |  |  |  | 223,969 |
Current liabilities |  |  | 123,506 |  |  |  | 2,452,219 |  |  |  | 17,757 |  |  |  | 62,378 |  |  |  | 64,218 |
Non-current liabilities |  |  | 19,333 |  |  |  | 142,013 |  |  |  | 2,009 |  |  |  | 12,391 |  |  |  | 89,622 |
Equity |  |  | 705,437 |  |  |  | 1,318,750 |  |  |  | 98,286 |  |  |  | 205,049 |  |  |  | 126,037 |
Operating revenue |  |  | 704,996 |  |  |  | 3,553,008 |  |  |  | 62,846 |  |  |  | 323,065 |  |  |  | 332,063 |
Profit or loss for the year |  |  | 56,008 |  |  |  | 115,885 |  |  |  | 3,085 |  |  |  | 1,426 |  |  |  | (4,875 | )
Total comprehensive income (loss) |  |  | 55,936 |  |  |  | 289,122 |  |  |  | 2,469 |  |  |  | (1,840 | ) |  |  | (6,558 | )
Cash flows from operating activities |  |  | 152,549 |  |  |  | 429,331 |  |  |  | 780 |  |  |  | 49,870 |  |  |  | 52,693 |
Cash flows from investing activities |  |  | (101,594 | ) |  |  | (419,894 | ) |  |  | (9,525 | ) |  |  | (50,138 | ) |  |  | (44,393 | )
Cash flows from financing activities |  |  | (18,833 | ) |  |  | (5,744 | ) |  |  | (687 | ) |  |  | (1,860 | ) |  |  | (5,227 | )
Net increase (decrease) in cash and cash equivalents |  |  | 32,122 |  |  |  | 3,693 |  |  |  | (9,432 | ) |  |  | (2,128 | ) |  |  | 3,073 |
Cash and cash equivalents at beginning of year |  |  | 31,728 |  |  |  | 275,089 |  |  |  | 15,649 |  |  |  | 39,186 |  |  |  | 5,708 |
Exchange differences |  |  | — |  |  |  | 380 |  |  |  | — |  |  |  | (15 | ) |  |  | — |
Cash and cash equivalents at end of year |  |  | 63,850 |  |  |  | 279,162 |  |  |  | 6,217 |  |  |  | 37,043 |  |  |  | 8,781 |
|  | December 31, 2020 |
(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 (%) |  |  | 49.7 | % |  |  | 30.5 | % |  |  | 55.2 | % |  |  | 32.9 | % |  |  | 13.2 | %
Current assets |  | ￦ | 480,450 |  |  | ￦ | 1,785,914 |  |  | ￦ | 90,056 |  |  | ￦ | 140,948 |  |  | ￦ | 79,076 |
Non-current assets |  |  | 439,026 |  |  |  | 1,298,484 |  |  |  | 29,638 |  |  |  | 148,001 |  |  |  | 239,380 |
Current liabilities |  |  | 153,236 |  |  |  | 1,602,667 |  |  |  | 17,045 |  |  |  | 74,045 |  |  |  | 136,565 |
Non-current liabilities |  |  | 21,803 |  |  |  | 176,083 |  |  |  | 1,788 |  |  |  | 18,554 |  |  |  | 57,172 |
Equity |  |  | 744,437 |  |  |  | 1,305,648 |  |  |  | 100,861 |  |  |  | 196,350 |  |  |  | 124,719 |
Operating revenue |  |  | 706,631 |  |  |  | 3,387,641 |  |  |  | 65,898 |  |  |  | 350,231 |  |  |  | 392,489 |
Profit or loss for the year |  |  | 58,190 |  |  |  | 39,455 |  |  |  | 3,809 |  |  |  | 2,080 |  |  |  | 212 |
Total comprehensive income (loss) |  |  | 55,647 |  |  |  | 61,796 |  |  |  | 3,442 |  |  |  | (8,700 | ) |  |  | (1,319 | )
Cash flows from operating activities |  |  | 160,934 |  |  |  | (119,163 | ) |  |  | 6,011 |  |  |  | 62,521 |  |  |  | 35,834 |
Cash flows from investing activities |  |  | (105,293 | ) |  |  | 58,042 |  |  |  | (3,353 | ) |  |  | (58,186 | ) |  |  | (57,976 | )
Cash flows from financing activities |  |  | (19,650 | ) |  |  | 22,790 |  |  |  | (1,515 | ) |  |  | (1,856 | ) |  |  | 14,652 |
Net increase (decrease) in cash and cash equivalents |  |  | 35,991 |  |  |  | (38,331 | ) |  |  | 1,143 |  |  |  | 2,479 |  |  |  | (7,490 | )
Cash and cash equivalents at beginning of year |  |  | 63,850 |  |  |  | 279,162 |  |  |  | 6,217 |  |  |  | 37,043 |  |  |  | 8,781 |
Exchange differences |  |  | (7 | ) |  |  | (247 | ) |  |  | — |  |  |  | (83 | ) |  |  | — |
Cash and cash equivalents at end of year |  |  | 99,834 |  |  |  | 240,584 |  |  |  | 7,360 |  |  |  | 39,439 |  |  |  | 1,29 1 |
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 2018, 2019 and 2020 is summarized as follows:
(In millions of Korean won) |  | 2018 |  |  | 2019 |  |  | 2020 |
Carrying amount of non-controlling interests acquired |  | ￦ | (194 | ) |  | ￦ | (9,566 | ) |  | ￦ | 1,750 |
Consideration paid to non-controlling interests |  |  | 11,312 |  |  |  | 484 |  |  |  | 9,878 |
Excess of consideration paid recognized in parent’s equity |  | ￦ | 11,118 |  |  | ￦ | (9,082 | ) |  | ￦ | 11,628 |

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