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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2018
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Summary Of Major Commitments With Local Financial Institutions | As at December 31, 2018, major commitments with local financial institutions are as follows:
(In millions of Korean won and thousands of foreign currencies) |  | Financial institution |  | Currency |  |  | Limit |  |  | Used amount |
Bank overdraft |  | Kookmin Bank and others |  |  | KRW |  |  |  | 1,697,000 |  |  |  | — |
Commercial papers |  | NH Investment & Securities Co., Ltd. |  |  | KRW |  |  |  | 300,000 |  |  |  | 300,000 |
Inter-Korean Cooperation Fund |  | Export-Import Bank of Korea |  |  | KRW |  |  |  | 37,700 |  |  |  | 3,948 |
Collateralized loan on electronic accounts receivable-trade |  | Shinhan Bank and others |  |  | KRW |  |  |  | 495,560 |  |  |  | 70,759 |
Plus electronic notes payable |  | Industrial Bank of Korea |  |  | KRW |  |  |  | 50,000 |  |  |  | 960 |
Loans for working capital |  | Korea Development Bank and others |  |  | KRW |  |  |  | 254,300 |  |  |  | 158,000 |
Facility loans |  | Shinhan Bank and others |  |  | KRW |  |  |  | 10,123 |  |  |  | 8,406 |
|  | Kookmin Bank and others |  |  | USD |  |  |  | 212,000 |  |  |  | 127,024 |
Facility loans on ships |  | Shinhan Bank |  |  | USD |  |  |  | 9,000 |  |  |  | 9,000 |
Export L/C |  | Shinhan Bank |  |  | USD |  |  |  | — |  |  |  | 1,156 |
Derivatives transaction limit |  | Korea Development Bank |  |  | KRW |  |  |  | 100,000 |  |  |  | 64,622 |
FX forward trading commitment |  | Shinhan Bank |  |  | USD |  |  |  | 11,500 |  |  |  | — |
Total |  |  |  |  | KRW |  |  |  | 2,944,683 |  |  |  | 606,695 |
|  |  |  |  | USD |  |  |  | 232,500 |  |  |  | 137,180 |
Summary of Guarantees Received from Financial Institutions | As at December 31, 2018, guarantees received from financial institutions are as follows:
(In millions of Korean won and thousands of foreign currencies) |  | Financial institution |  | Currency |  |  | Limit |
Performance guarantee |  | Seoul Guarantee Insurance and others |  |  | KRW |  |  |  | 299,689 |
|  |  |  |  | USD |  |  |  | 1,200 |
Guarantee for import letters of credit |  | Industrial Bank of Korea and others |  |  | USD |  |  |  | 5,980 |
Guarantee for payment in Korean currency |  | Shinhan Bank and others |  |  | KRW |  |  |  | 5 |
Guarantee for payment in foreign currency |  | KEB Hana and others |  |  | USD |  |  |  | 51,766 |
|  |  |  |  | PLN | 1 |  |  | 23,000 |
Comprehensive credit line |  | KEB Hana Bank and others |  |  | KRW |  |  |  | 40,000 |
Comprehensive credit line |  | KEB Hana Bank |  |  | USD |  |  |  | 10,000 |
Bid guarantee |  | KEB Hana Bank |  |  | USD |  |  |  | 400 |
Bid guarantee |  |  |  |  | KRW |  |  |  | 58,992 |
Performance guarantee /Warranty Guarantee |  | Korea Software Financial Cooperative and others |  |  | KRW |  |  |  | 376,420 |
Guarantee for advances received/others |  |  |  |  | KRW |  |  |  | 124,901 |
Bid guarantee |  |  |  |  | KRW |  |  |  | 350 |
Warranty guarantee |  |  |  |  | KRW |  |  |  | 1,037 |
Guarantees for licensing |  |  |  |  | KRW |  |  |  | 4,070 |
Performance guarantee/Warranty Guarantee |  | Seoul Guarantee Insurance |  |  | KRW |  |  |  | 996 |
Guarantee for public sale |  |  |  |  | KRW |  |  |  | 120 |
Guarantee for deposits |  |  |  |  | KRW |  |  |  | 3,525 |
Total |  |  |  |  | KRW |  |  |  | 910,105 |
|  |  |  |  | USD |  |  |  | 69,346 |
|  |  |  |  | PLN | 1 |  |  | 23,000 |
1 | Polish Zloty.
Summary Of Guarantees Provided By The Group For Third Parties | As at December 31, 2018, guarantees provided by the Group to a third party, are as follows:
(In millions of Korean won and thousands of foreign currencies) |  | Subject to payment guarantees |  | Creditor |  | Currency |  |  | Limit |  |  | Used amount |  |  | Period |
KT Estate Inc. |  | Busan Gaya Centreville Buyers |  | Shinhan Bank |  |  | KRW |  |  |  | 4,854 |  |  |  | 2,503 |  |  |  | Nov 10, 2017 ~Oct. 31, 2020 |
KT Estate Inc. |  | Daegu Beomeo-Crossroads SeohanIDaum Buyers |  | Shinhan Bank |  |  | KRW |  |  |  | 8,172 |  |  |  | 4,271 |  |  |  | Oct 29, 2017 ~Nov. 30, 2020 |
KT Hitel Co., Ltd. |  | Shinhan Bank |  | Cash payers |  |  | KRW |  |  |  | 538 |  |  |  | — |  |  |  | Apr 19, 2018 ~Apr 19, 2019 |
KT Hitel Co., Ltd. |  | Korea Software Financial Cooperative |  | Yonsei University and others |  |  | KRW |  |  |  | 34,715 |  |  |  | 1,616 |  |  |  | Oct 22, 2018 ~Oct 22, 2021 |
BC Card Co., Ltd |  | PT BCcard Asia Pacific |  | Shinhan Bank, Indonesia |  |  | IDR |  |  |  | 8,000,000 |  |  |  | 8,000,000 |  |  |  | Sep 18, 2018 ~Sep 17, 2019 |

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