XML 117 R7.htm IDEA: XBRL DOCUMENT
v3.20.1

General Information | 12 Months Ended
--- | ---
Dec. 31, 2019
Text block [abstract] |
General Information |
1. | General Information
The consolidated financial statements include the accounts of KT Corporation, which is the controlling company as defined under IFRS 10, Consolidated Financial Statements, and its 65 controlled subsidiaries as described in Note 1.2 (collectively referred to as the “Group”).
| 1.1 | The Controlling Company
KT Corporation (the “Controlling Company”) commenced operations on January 1, 1982, when it spun off from the Korea Communications Commission (formerly the Korean Ministry of Information and Communications) to provide telephone services and to engage in the development of advanced communications services under the Act of Telecommunications of Korea. The headquarters are located in Seongnam City, Gyeonggi Province, Republic of Korea, and the address of its registered head office is 90, Buljeong-ro, Bundang-gu, Seongnam City, Gyeonggi Province. On October 1, 1997, upon the announcement of the Government-Investment Enterprises Management Basic Act and the Privatization Law, the Controlling Company became a government-funded institution under the Commercial Code of Korea. On December 23, 1998, the Controlling Company’s shares were listed on the Korea Exchange. On May 29, 1999, the Controlling Company issued 24,282,195 additional shares and issued American Depository Shares (ADS), representing new shares and 20,813,311 government-owned shares, at the New York Stock Exchange. On July 2, 2001, the additional ADS representing 55,502,161 government-owned shares were issued at the New York Stock Exchange. In 2002, the Controlling Company acquired the entire government-owned shares in accordance with the Korean government’s privatization plan. As at the end of the reporting period, the Korean government does not own any share in the Controlling Company.
| 1.2 | Consolidated Subsidiaries
The consolidated subsidiaries as at December 31, 2018 and 2019, are as follows:
|  |  |  |  |  | Controlling percentage ownership 1 (%) |  |
Subsidiary |  | Type of Business |  | Location |  | December 31, 2018 |  | December 31, 2019 |  | Closing month
KT Powertel Co., Ltd. 2 |  | Trunk radio system business |  | Korea |  | 44.8% |  | 44.8% |  | December
KT Linkus Co., Ltd. |  | Public telephone maintenance |  | Korea |  | 92.4% |  | 92.4% |  | December
KT Submarine Co., Ltd. 2, 4 |  | Submarine cable construction and maintenance |  | Korea |  | 39.3% |  | 39.3% |  | December
KT Telecop Co., Ltd. |  | Security service |  | Korea |  | 86.8% |  | 86.8% |  | December
KT Hitel Co., Ltd. |  | Data communication |  | Korea |  | 67.1% |  | 67.1% |  | December
KT Service Bukbu Co., Ltd. |  | Opening services of fixed line |  | Korea |  | 67.3% |  | 67.3% |  | December
KT Service Nambu Co., Ltd. |  | Opening services of fixed line |  | Korea |  | 77.3% |  | 77.3% |  | December
KT Commerce Inc. |  | B2C, B2B service |  | Korea |  | 100.0% |  | 100.0% |  | December
KT Strategic Investment Fund No.2 |  | Investment fund |  | Korea |  | 100.0% |  | 100.0% |  | December
KT Strategic Investment Fund No.3 |  | Investment fund |  | Korea |  | 100.0% |  | 100.0% |  | December
KT Strategic Investment Fund No.4 |  | Investment fund |  | Korea |  | 100.0% |  | 100.0% |  | December
KT Strategic Investment Fund No.5 |  | Investment fund |  | Korea |  | — |  | 100.0% |  | December
BC-VP Strategic Investment Fund No.1 |  | Investment fund |  | Korea |  | 100.0% |  | 100.0% |  | December
BC Card Co., Ltd. |  | Credit card business |  | Korea |  | 69.5% |  | 69.5% |  | December
VP Inc. |  | Payment security service for credit card, others |  | Korea |  | 50.9% |  | 50.9% |  | December
H&C Network |  | Call centre for financial sectors |  | Korea |  | 100.0% |  | 100.0% |  | December
BC Card China Co., Ltd. |  | Software development and data processing |  | China |  | 100.0% |  | 100.0% |  | December
INITECH Co., Ltd. 4 |  | Internet banking ASP and security solutions |  | Korea |  | 58.2% |  | 58.2% |  | December
Smartro Co., Ltd. |  | VAN (Value Added Network) business |  | Korea |  | 81.1% |  | 64.5% |  | December
KTDS Co., Ltd. 4 |  | System integration and maintenance |  | Korea |  | 95.5% |  | 95.5% |  | December
KT M Hows Co., Ltd. |  | Mobile marketing |  | Korea |  | 90.0% |  | 90.0% |  | December
KT M&S Co., Ltd. |  | PCS distribution |  | Korea |  | 100.0% |  | 100.0% |  | December
GENIE Music Corporation (KT Music Corporation) 2 |  | Online music production and distribution |  | Korea |  | 36.0% |  | 36.0% |  | December
KT MOS Bukbu Co., Ltd. 4 |  | Telecommunication facility maintenance |  | Korea |  | 100.0% |  | 100.0% |  | December
KT MOS Nambu Co., Ltd. 4 |  | Telecommunication facility maintenance |  | Korea |  | 98.4% |  | 98.4% |  | December
KT Skylife Co., Ltd. 4 |  | Satellite broadcasting business |  | Korea |  | 50.3% |  | 50.3% |  | December
Skylife TV Co., Ltd. |  | TV contents provider |  | Korea |  | 92.6% |  | 92.6% |  | December
KT Estate Inc. |  | Residential building development and supply |  | Korea |  | 100.0% |  | 100.0% |  | December
KT AMC Co., Ltd. |  | Asset management and consulting services |  | Korea |  | 100.0% |  | 100.0% |  | December
NEXR Co., Ltd. |  | Cloud system implementation |  | Korea |  | 100.0% |  | 100.0% |  | December
KTGDH Co., Ltd.(KTSB Data service) |  | Data centre development and related service |  | Korea |  | 51.0% |  | 100.0% |  | December
KT Sat Co., Ltd. |  | Satellite communication business |  | Korea |  | 100.0% |  | 100.0% |  | December
Nasmedia Co., Ltd. 3,4 |  | Solution provider and IPTV advertisement sales business |  | Korea |  | 42.8% |  | 44.0% |  | December
KT Sports Co., Ltd. |  | Management of sports group |  | Korea |  | 100.0% |  | 100.0% |  | December
KT Music Contents Fund No.1 |  | Music contents investment business |  | Korea |  | 80.0% |  | 80.0% |  | December
KT Music Contents Fund No.2 |  | Music contents investment business |  | Korea |  | 100.0% |  | 100.0% |  | December
KT-Michigan Global Content Fund |  | Content investment business |  | Korea |  | 88.6% |  | 88.6% |  | December
Autopion Co., Ltd. |  | Information and communication service |  | Korea |  | 100.0% |  | 100.0% |  | December
KTCS Corporation 2,4 |  | Database and online information provider |  | Korea |  | 30.9% |  | 30.9% |  | December
KTIS Corporation 2,4 |  | Database and online information provider |  | Korea |  | 30.1% |  | 30.1% |  | December
KT M mobile |  | Special category telecommunications operator and sales of communication device |  | Korea |  | 100.0% |  | 100.0% |  | December
KT Investment Co., Ltd. |  | Technology business finance |  | Korea |  | 100.0% |  | 100.0% |  | December
Whowho&Company Co., Ltd. |  | Software development and supply |  | Korea |  | 100.0% |  | 100.0% |  | December
PlayD Co., Ltd. (N Search Marketing Co., Ltd.) |  | Advertising agency |  | Korea |  | 100.0% |  | 100.0% |  | December
Next connect PFV |  | Residential building development and supply |  | Korea |  | 100.0% |  | 100.0% |  | December
KT Rwanda Networks Ltd. |  | Network installation and management |  | Rwanda |  | 51.0% |  | 51.0% |  | December
AOS Ltd. |  | System integration and maintenance |  | Rwanda |  | 51.0% |  | 51.0% |  | December
KT Belgium |  | Foreign investment business |  | Belgium |  | 100.0% |  | 100.0% |  | December
KT ORS Belgium |  | Foreign investment business |  | Belgium |  | 100.0% |  | 100.0% |  | December
Korea Telecom Japan Co., Ltd. |  | Foreign telecommunication business |  | Japan |  | 100.0% |  | 100.0% |  | December
KBTO sp.zo.o. |  | Electronic communication business |  | Poland |  | 96.2% |  | 97.2% |  | December
Korea Telecom China Co., Ltd. |  | Foreign telecommunication business |  | China |  | 100.0% |  | 100.0% |  | December
KT Dutch B.V. |  | Super iMax and East Telecom management |  | Netherlands |  | 100.0% |  | 100.0% |  | December
Super iMax LLC |  | Wireless high speed internet business |  | Uzbekistan |  | 100.0% |  | 100.0% |  | December
East Telecom LLC |  | Fixed line telecommunication business |  | Uzbekistan |  | 91.0% |  | 91.0% |  | December
Korea Telecom America, Inc. |  | Foreign telecommunication business |  | USA |  | 100.0% |  | 100.0% |  | December
PT. KT Indonesia |  | Foreign telecommunication business |  | Indonesia |  | 99.0% |  | 99.0% |  | December
PT. BC Card Asia Pacific |  | Software development and supply |  | Indonesia |  | 99.9% |  | 99.9% |  | December
KT Hongkong Telecommunications Co., Ltd. |  | Fixed line communication business |  | Hong Kong |  | 100.0% |  | 100.0% |  | December
Korea Telecom Singapore Pte. Ltd. |  | Foreign investment business |  | Singapore |  | 100.0% |  | 100.0% |  | December
Texnoprosistem LLP |  | Fixed line internet business |  | Uzbekistan |  | 100.0% |  | 100.0% |  | December
Nasmedia Thailand Co., Ltd. |  | Internet advertising solution |  | Thailand |  | 99.9% |  | 99.9% |  | December
KT Huimangjieum |  | Manufacturing |  | Korea |  | — |  | 100.0% |  | December
GE Premier 1st Corporate Restructuring Real Estate Investment Trust Co. |  | Residential building investment and rent |  | Korea |  | — |  | 63.5% |  | December
K-REALTY RENTAL HOUSING REIT 3 |  | Residential building |  | Korea |  | — |  | 100.0% |  | December
1 | Sum of the ownership interests owned by the Controlling Company and subsidiaries.
2 | Although the Controlling Company owns less than 50% ownership in this entity, this entity is consolidated as the Controlling Company can exercise the majority voting rights in its decision-making process at all times considering the historical voting pattern at the shareholders’ meetings.
3 | Although the Controlling Company owns less than 50% ownership in this entity, this entity is consolidated as the Controlling Company holds the majority of voting right based on an agreement with other investors.
4 | The number of subsidiaries’ treasury stock is deducted from the total number of shares when calculating the controlling percentage ownership.
Changes in scope of consolidation in 2019 are as follows:
Changes |  | Location |  | Subsidiary |  | Reason
Included |  | Korea |  | KT Strategic Investment Fund No.5 |  | Newly established
| Korea |  | KT Huimangjieum |  | Newly established
| Korea |  | K-REALTY RENTAL HOUSING REIT 3 |  | Newly established
| Korea |  | GE Premier 1st Corporate Restructuring Real Estate Investment Trust Co. |  | Substantial Control Held
Excluded |  | Hongkong |  | KT Hong Kong Limited |  | Liquidated
|  | Korea |  | KT Strategic Investment Fund No.1 |  | Liquidated
Summarized information for consolidated subsidiaries as at and for the years ended December 31, 2017, 2018 and 2019, follows:
(In millions of Korean won) |  | 2017 |
|  | Total assets |  |  | Total liabilities |  |  | Operating revenue |  |  | Profit (loss) for the year |
KT Powertel Co., Ltd. |  | ￦ | 115,125 |  |  | ￦ | 18,937 |  |  | ￦ | 69,234 |  |  | ￦ | 2,112 |
KT Linkus Co., Ltd. |  |  | 59,344 |  |  |  | 51,516 |  |  |  | 112,043 |  |  |  | 725 |
KT Submarine Co., Ltd. |  |  | 142,797 |  |  |  | 34,056 |  |  |  | 73,985 |  |  |  | 8,243 |
KT Telecop Co., Ltd. |  |  | 264,353 |  |  |  | 131,633 |  |  |  | 317,591 |  |  |  | 2,885 |
KT Hitel Co., Ltd. |  |  | 258,240 |  |  |  | 52,943 |  |  |  | 227,884 |  |  |  | 3,225 |
KT Service Bukbu Co., Ltd. |  |  | 29,281 |  |  |  | 22,096 |  |  |  | 194,837 |  |  |  | 688 |
KT Service Nambu Co., Ltd. |  |  | 36,076 |  |  |  | 26,412 |  |  |  | 232,996 |  |  |  | 875 |
BC Card Co., Ltd. 1 |  |  | 4,048,263 |  |  |  | 2,955,038 |  |  |  | 3,628,995 |  |  |  | 156,109 |
H&C Network 1 |  |  | 273,856 |  |  |  | 65,446 |  |  |  | 277,622 |  |  |  | 16,104 |
Nasmedia Co., Ltd. 1 |  |  | 315,967 |  |  |  | 188,197 |  |  |  | 120,667 |  |  |  | 26,676 |
KTDS Co., Ltd. 1 |  |  | 144,922 |  |  |  | 93,343 |  |  |  | 459,266 |  |  |  | 11,584 |
KT M Hows Co., Ltd. |  |  | 42,738 |  |  |  | 28,489 |  |  |  | 24,610 |  |  |  | 4,097 |
KT M&S Co., Ltd. |  |  | 242,388 |  |  |  | 231,151 |  |  |  | 734,420 |  |  |  | (9,707 | )
GENIE Music Corporation (KT Music Corporation) |  |  | 139,686 |  |  |  | 48,512 |  |  |  | 156,163 |  |  |  | (3,401 | )
KT Skylife Co., Ltd. 1 |  |  | 792,893 |  |  |  | 210,550 |  |  |  | 687,752 |  |  |  | 57,314 |
KT Estate Inc. 1 |  |  | 1,869,194 |  |  |  | 502,915 |  |  |  | 428,446 |  |  |  | 52,416 |
KTGDH Co., Ltd. (KTSB Data service) |  |  | 18,306 |  |  |  | 605 |  |  |  | 4,950 |  |  |  | (1,651 | )
KT Sat Co., Ltd. |  |  | 742,391 |  |  |  | 220,804 |  |  |  | 147,649 |  |  |  | 29,601 |
KT Sports |  |  | 11,131 |  |  |  | 7,805 |  |  |  | 53,357 |  |  |  | (199 | )
KT Music Contents Fund No.1 |  |  | 13,804 |  |  |  | 1,041 |  |  |  | 370 |  |  |  | (499 | )
KT Music Contents Fund No.2 |  |  | 7,500 |  |  |  | 11 |  |  |  | — |  |  |  | (11 | )
KT-Michigan Global Content Fund |  |  | 14,575 |  |  |  | 147 |  |  |  | 159 |  |  |  | (426 | )
Autopion Co., Ltd. |  |  | 6,306 |  |  |  | 3,530 |  |  |  | 6,679 |  |  |  | (618 | )
KT M mobile Co., Ltd. |  |  | 93,601 |  |  |  | 21,453 |  |  |  | 159,684 |  |  |  | (38,883 | )
KT Investment Co., Ltd. 1 |  |  | 54,673 |  |  |  | 38,313 |  |  |  | 8,794 |  |  |  | (619 | )
KTCS Corporation 1 |  |  | 348,334 |  |  |  | 188,764 |  |  |  | 968,186 |  |  |  | 7,385 |
KTIS Corporation |  |  | 223,818 |  |  |  | 62,569 |  |  |  | 438,597 |  |  |  | 8,337 |
Korea Telecom Japan Co., Ltd. 1 |  |  | 1,554 |  |  |  | 2,788 |  |  |  | 2,772 |  |  |  | 536 |
Korea Telecom China Co., Ltd. |  |  | 665 |  |  |  | 32 |  |  |  | 1,030 |  |  |  | 348 |
KT Dutch B.V. |  |  | 30,312 |  |  |  | 50 |  |  |  | 206 |  |  |  | 169 |
Super iMax LLC |  |  | 3,449 |  |  |  | 4,886 |  |  |  | 7,314 |  |  |  | (4,584 | )
East Telecom LLC 1 |  |  | 11,672 |  |  |  | 11,748 |  |  |  | 19,663 |  |  |  | (9,118 | )
Korea Telecom America, Inc. |  |  | 3,694 |  |  |  | 791 |  |  |  | 6,783 |  |  |  | 109 |
PT. KT Indonesia |  |  | 8 |  |  |  | — |  |  |  | — |  |  |  | (6 | )
KT Rwanda Networks Ltd. 2 |  |  | 151,359 |  |  |  | 139,561 |  |  |  | 15,931 |  |  |  | (22,762 | )
KT Belgium |  |  | 86,455 |  |  |  | 8 |  |  |  | 49 |  |  |  | (2 | )
KT ORS Belgium |  |  | 1,769 |  |  |  | 14 |  |  |  | 10 |  |  |  | (10 | )
KBTO sp.zo.o. |  |  | 3,311 |  |  |  | 2,268 |  |  |  | 67 |  |  |  | (3,456 | )
AOS Ltd. 2 |  |  | 9,437 |  |  |  | 4,519 |  |  |  | 8,952 |  |  |  | (682 | )
KT Hongkong Telecommunications Co., Ltd. |  |  | 2,578 |  |  |  | 1,497 |  |  |  | 7,304 |  |  |  | 494 |
(In millions of Korean won) |  | 2018 |
|  | Total assets |  |  | Total liabilities |  |  | Operating revenue |  |  | Profit (loss) for the year |
KT Powertel Co., Ltd. |  | ￦ | 124,064 |  |  | ￦ | 28,217 |  |  | ￦ | 65,620 |  |  | ￦ | (5,545 | )
KT Linkus Co., Ltd. |  |  | 54,147 |  |  |  | 44,895 |  |  |  | 106,337 |  |  |  | 1,216 |
KT Submarine Co., Ltd. |  |  | 130,715 |  |  |  | 27,530 |  |  |  | 61,652 |  |  |  | (4,286 | )
KT Telecop Co., Ltd. |  |  | 272,492 |  |  |  | 140,314 |  |  |  | 328,262 |  |  |  | 166 |
KT Hitel Co., Ltd. |  |  | 272,708 |  |  |  | 66,043 |  |  |  | 279,117 |  |  |  | 657 |
KT Service Bukbu Co., Ltd. |  |  | 30,599 |  |  |  | 23,964 |  |  |  | 195,961 |  |  |  | (31 | )
KT Service Nambu Co., Ltd. |  |  | 37,452 |  |  |  | 27,939 |  |  |  | 230,088 |  |  |  | 160 |
BC Card Co., Ltd. 1 |  |  | 3,722,379 |  |  |  | 2,630,536 |  |  |  | 3,551,715 |  |  |  | 70,889 |
H&C Network 1 |  |  | 245,841 |  |  |  | 63,188 |  |  |  | 297,470 |  |  |  | (15,944 | )
Nasmedia Co., Ltd. 1 |  |  | 303,112 |  |  |  | 161,164 |  |  |  | 106,805 |  |  |  | 20,596 |
KTDS Co., Ltd. 1 |  |  | 148,675 |  |  |  | 95,834 |  |  |  | 434,302 |  |  |  | 8,586 |
KT M Hows Co., Ltd. |  |  | 60,197 |  |  |  | 42,386 |  |  |  | 26,673 |  |  |  | 3,691 |
KT M&S Co., Ltd. |  |  | 228,073 |  |  |  | 207,740 |  |  |  | 791,652 |  |  |  | 11,408 |
GENIE Music Corporation (KT Music Corporation) |  |  | 221,559 |  |  |  | 75,827 |  |  |  | 171,314 |  |  |  | 6,374 |
KT MOS Bukbu Co., Ltd. |  |  | 14,121 |  |  |  | 10,571 |  |  |  | 16,543 |  |  |  | (782 | )
KT MOS Nambu Co., Ltd. |  |  | 14,313 |  |  |  | 8,927 |  |  |  | 14,941 |  |  |  | (2,418 | )
KT Skylife Co., Ltd. 1 |  |  | 816,001 |  |  |  | 149,841 |  |  |  | 694,059 |  |  |  | 52,010 |
KT Estate Inc. 1 |  |  | 1,695,995 |  |  |  | 304,712 |  |  |  | 569,269 |  |  |  | 51,854 |
KTGDH Co., Ltd. (KTSB Data service) |  |  | 8,632 |  |  |  | 523 |  |  |  | 4,627 |  |  |  | (9,576 | )
KT Sat Co., Ltd. |  |  | 685,926 |  |  |  | 173,513 |  |  |  | 137,186 |  |  |  | 4,921 |
KT Sports Co., Ltd. |  |  | 9,560 |  |  |  | 6,376 |  |  |  | 55,565 |  |  |  | (154 | )
KT Music Contents Fund No.1 |  |  | 14,092 |  |  |  | 1,035 |  |  |  | 559 |  |  |  | 294 |
KT Music Contents Fund No.2 |  |  | 7,629 |  |  |  | 281 |  |  |  | 150 |  |  |  | (142 | )
KT-Michigan Global Content Fund |  |  | 12,741 |  |  |  | — |  |  |  | 869 |  |  |  | (670 | )
Autopion Co., Ltd. |  |  | 8,838 |  |  |  | 5,801 |  |  |  | 12,035 |  |  |  | 453 |
KT M mobile Co., Ltd. |  |  | 146,334 |  |  |  | 35,335 |  |  |  | 172,674 |  |  |  | (10,085 | )
KT Investment Co., Ltd. 1 |  |  | 74,580 |  |  |  | 58,040 |  |  |  | 8,095 |  |  |  | 247 |
KTCS Corporation 1 |  |  | 350,280 |  |  |  | 188,561 |  |  |  | 1,019,787 |  |  |  | 11,401 |
KTIS Corporation |  |  | 229,246 |  |  |  | 68,997 |  |  |  | 451,532 |  |  |  | 7,900 |
Next connect PFV |  |  | 385,769 |  |  |  | 34,370 |  |  |  | 143 |  |  |  | (12,449 | )
Korea Telecom Japan Co., Ltd. 1 |  |  | 1,326 |  |  |  | 2,910 |  |  |  | 1,965 |  |  |  | (126 | )
Korea Telecom China Co., Ltd. |  |  | 661 |  |  |  | 22 |  |  |  | 681 |  |  |  | 10 |
KT Dutch B.V. |  |  | 31,693 |  |  |  | 41 |  |  |  | 191 |  |  |  | 105 |
Super iMax LLC |  |  | 4,150 |  |  |  | 4,528 |  |  |  | 4,845 |  |  |  | (424 | )
East Telecom LLC 1 |  |  | 16,590 |  |  |  | 14,263 |  |  |  | 15,087 |  |  |  | 2,639 |
Korea Telecom America, Inc. |  |  | 4,218 |  |  |  | 832 |  |  |  | 7,554 |  |  |  | 350 |
PT. KT Indonesia |  |  | 8 |  |  |  | — |  |  |  | — |  |  |  | — |
KT Rwanda Networks Ltd. 2 |  |  | 144,129 |  |  |  | 162,801 |  |  |  | 15,150 |  |  |  | (29,238 | )
KT Belgium |  |  | 90,172 |  |  |  | 1 |  |  |  | 29 |  |  |  | (43 | )
KT ORS Belgium |  |  | 6,709 |  |  |  | 5 |  |  |  | — |  |  |  | (46 | )
KBTO sp.zo.o. |  |  | 1,364 |  |  |  | 217 |  |  |  | 202 |  |  |  | (3,771 | )
AOS Ltd. 2 |  |  | 14,018 |  |  |  | 4,952 |  |  |  | 6,300 |  |  |  | (680 | )
KT Hongkong Telecommunications Co., Ltd. |  |  | 3,616 |  |  |  | 2,143 |  |  |  | 9,990 |  |  |  | 351 |
1 | These companies are the intermediate controlling companies of other subsidiaries and the above financial information is from their consolidated financial statements.
2 | At the end of the reporting period, convertible preferred stock issued by subsidiaries is included in liabilities.
(In millions of Korean won) |  | 2019 |
|  | Total assets |  |  | Total liabilities |  |  | Operating revenue |  |  | Profit (loss) for the year |
KT Powertel Co., Ltd. |  | ￦ | 118,052 |  |  | ￦ | 19,766 |  |  | ￦ | 62,846 |  |  | ￦ | 3,085 |
KT Linkus Co., Ltd. |  |  | 70,494 |  |  |  | 62,088 |  |  |  | 97,892 |  |  |  | (2,258 | )
KT Submarine Co., Ltd. |  |  | 120,947 |  |  |  | 18,452 |  |  |  | 55,244 |  |  |  | 486 |
KT Telecop Co., Ltd. |  |  | 279,878 |  |  |  | 153,841 |  |  |  | 332,063 |  |  |  | (4,875 | )
KT Hitel Co., Ltd. |  |  | 279,818 |  |  |  | 74,769 |  |  |  | 323,065 |  |  |  | 1,426 |
KT Service Bukbu Co., Ltd. |  |  | 64,802 |  |  |  | 58,984 |  |  |  | 219,427 |  |  |  | (445 | )
KT Service Nambu Co., Ltd. |  |  | 63,917 |  |  |  | 55,548 |  |  |  | 266,148 |  |  |  | 280 |
BC Card Co., Ltd. 1 |  |  | 3,912,982 |  |  |  | 2,594,232 |  |  |  | 3,553,008 |  |  |  | 115,885 |
H&C Network 1 |  |  | 282,016 |  |  |  | 68,401 |  |  |  | 320,701 |  |  |  | (1,593 | )
Nasmedia Co., Ltd. 1 |  |  | 356,236 |  |  |  | 203,105 |  |  |  | 117,550 |  |  |  | 22,484 |
KTDS Co., Ltd. 1 |  |  | 158,153 |  |  |  | 105,462 |  |  |  | 428,758 |  |  |  | 9,027 |
KT M Hows Co., Ltd. |  |  | 74,326 |  |  |  | 50,638 |  |  |  | 33,443 |  |  |  | 6,771 |
KT M&S Co., Ltd. |  |  | 248,142 |  |  |  | 215,777 |  |  |  | 813,498 |  |  |  | 12,732 |
GENIE Music Corporation (KT Music Corporation) |  |  | 234,131 |  |  |  | 80,952 |  |  |  | 230,480 |  |  |  | 7,658 |
KT MOS Bukbu Co., Ltd. |  |  | 33,376 |  |  |  | 28,841 |  |  |  | 63,761 |  |  |  | 353 |
KT MOS Nambu Co., Ltd. |  |  | 34,258 |  |  |  | 26,722 |  |  |  | 67,300 |  |  |  | 3,099 |
KT Skylife Co., Ltd. 1 |  |  | 848,276 |  |  |  | 142,839 |  |  |  | 704,996 |  |  |  | 56,008 |
KT Estate Inc. 1 |  |  | 1,686,000 |  |  |  | 295,706 |  |  |  | 485,686 |  |  |  | 48,552 |
KTGDH Co., Ltd. (KTSB Data service) |  |  | 10,437 |  |  |  | 1,628 |  |  |  | 3,977 |  |  |  | 344 |
KT Sat Co., Ltd. |  |  | 651,195 |  |  |  | 127,523 |  |  |  | 168,376 |  |  |  | 16,497 |
KT Sports Co., Ltd. |  |  | 15,603 |  |  |  | 8,333 |  |  |  | 55,241 |  |  |  | (464 | )
KT Music Contents Fund No.1 |  |  | 10,579 |  |  |  | 1,677 |  |  |  | 521 |  |  |  | 345 |
KT Music Contents Fund No.2 |  |  | 7,675 |  |  |  | 279 |  |  |  | 331 |  |  |  | 48 |
KT-Michigan Global Content Fund |  |  | 11,688 |  |  |  | 61 |  |  |  | 248 |  |  |  | (1,113 | )
Autopion Co., Ltd. |  |  | 7,460 |  |  |  | 4,894 |  |  |  | 5,604 |  |  |  | (302 | )
KT M mobile Co., Ltd. |  |  | 135,917 |  |  |  | 30,603 |  |  |  | 161,720 |  |  |  | (5,580 | )
KT Investment Co., Ltd. 1 |  |  | 73,463 |  |  |  | 56,212 |  |  |  | 13,375 |  |  |  | 847 |
KTCS Corporation 1 |  |  | 378,171 |  |  |  | 213,983 |  |  |  | 944,778 |  |  |  | 7,597 |
KTIS Corporation |  |  | 305,798 |  |  |  | 137,524 |  |  |  | 454,561 |  |  |  | 9,205 |
Next connect PFV |  |  | 385,412 |  |  |  | 24,275 |  |  |  | 1,590 |  |  |  | (5,898 | )
Korea Telecom Japan Co., Ltd. 1 |  |  | 1,851 |  |  |  | 2,858 |  |  |  | 2,891 |  |  |  | 651 |
Korea Telecom China Co., Ltd. |  |  | 879 |  |  |  | 39 |  |  |  | 844 |  |  |  | 192 |
KT Dutch B.V. |  |  | 31,003 |  |  |  | 50 |  |  |  | — |  |  |  | (242 | )
Super iMax LLC |  |  | 3,568 |  |  |  | 5,304 |  |  |  | 4,604 |  |  |  | (631 | )
East Telecom LLC 1 |  |  | 20,857 |  |  |  | 16,302 |  |  |  | 17,186 |  |  |  | 2,140 |
Korea Telecom America, Inc. |  |  | 4,611 |  |  |  | 537 |  |  |  | 6,808 |  |  |  | 572 |
PT. KT Indonesia |  |  | 8 |  |  |  | — |  |  |  | — |  |  |  | — |
KT Rwanda Networks Ltd. 2 |  |  | 132,461 |  |  |  | 183,164 |  |  |  | 18,013 |  |  |  | (31,662 | )
KT Belgium |  |  | 93,321 |  |  |  | 11 |  |  |  | — |  |  |  | (64 | )
KT ORS Belgium |  |  | 6,913 |  |  |  | 14 |  |  |  | — |  |  |  | (43 | )
KBTO sp.zo.o. |  |  | 1,767 |  |  |  | 245 |  |  |  | 519 |  |  |  | (3,457 | )
AOS Ltd. 2 |  |  | 12,337 |  |  |  | 3,993 |  |  |  | 6,982 |  |  |  | (591 | )
KT Hongkong Telecommunications Co., Ltd. |  |  | 5,126 |  |  |  | 2,923 |  |  |  | 13,321 |  |  |  | 586 |
KT Huimangjieum |  |  | 2,129 |  |  |  | 1,019 |  |  |  | 1,027 |  |  |  | (390 | )
GE Premier 1st Corporate Restructuring Real Estate Investment Trust Co. |  |  | 6,285 |  |  |  | 1,139 |  |  |  | 176 |  |  |  | 70 |
K-REALTY RENTAL HOUSING REIT 3 |  |  | 300 |  |  |  | — |  |  |  | — |  |  |  | — |
1 | These companies are the intermediate controlling companies of other subsidiaries and the above financial information is from their consolidated financial statements.
2 | At the end of the reporting period, convertible preferred stock issued by subsidiaries is included in liabilities.

X
- Definition The entire disclosure for general information about financial statements. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 51 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_51&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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