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Assets pledged as collateral (Details) - 12 months ended Dec. 31, 2018 JD in Thousands, $ in Thousands, ₩ in Millions | KRW (₩) | USD ($) | JOD (JD)
--- | --- | --- | ---
Land, buildings, structures and machinery and others |  |  |  |
Disclsoure of assets pledged as collateral [Line Items] |  |  |  |
Name of Guarantor |  | Commerce and Industry Energy Co., Ltd. |  |
Name of Guarantee |  | IBK and others |  |
Value of collateral |  | ₩ 110,500 |  |
Description of assets pledged as collateral description | [1] | Collateral for borrowings |  |
Shareholdings of DS Power Co., Ltd. |  |  |  |
Disclsoure of assets pledged as collateral [Line Items] |  |  |  |
Name of Guarantor |  | Korea Southern Power Co., Ltd |  |
Name of Guarantee |  | Korea Development Bank and others |  |
Value of collateral |  | ₩ 916 |  |
Description of assets pledged as collateral description |  | Collateral for borrowings |  |
Property, plant and equipment and others 1 |  |  |  |
Disclsoure of assets pledged as collateral [Line Items] |  |  |  |
Name of Guarantor |  | Mira Power Limited |  |
Name of Guarantee |  | International Finance Corporation and others |  |
Value of collateral | $ |  |  | $ 275,600 |
Description of assets pledged as collateral description | [2] | Collateral for borrowings |  |
Cash and Cash Equivalents |  |  |  |
Disclsoure of assets pledged as collateral [Line Items] |  |  |  |
Name of Guarantor |  | Gyeonggi Green Energy Co., Ltd. |  |
Name of Guarantee |  | Korea Development Bank and others |  |
Value of collateral |  | ₩ 327,080 |  |
Description of assets pledged as collateral description | [1] | Collateral for borrowings |  |
Cash and cash equivalents |  |  |  |
Disclsoure of assets pledged as collateral [Line Items] |  |  |  |
Name of Guarantor |  | KOSPO Youngnam Power Co., Ltd. |  |
Name of Guarantee |  | Shinhan Bank and others |  |
Value of collateral |  | ₩ 396,120 |  |
Description of assets pledged as collateral description | [1] | Collateral for borrowings |  |
Property, plant and equipment and others |  |  |  |
Disclsoure of assets pledged as collateral [Line Items] |  |  |  |
Name of Guarantor |  | Gyeongju Wind Power Co., Ltd. |  |
Name of Guarantee |  | Samsung Fire & Marine Insurance Co., Ltd. And others |  |
Value of collateral |  | ₩ 110,240 |  |
Description of assets pledged as collateral description | [1] | Collateral for borrowings |  |
Utility plant and others |  |  |  |
Disclsoure of assets pledged as collateral [Line Items] |  |  |  |
Name of Guarantor |  | Korea Offshore Wind Power Co., Ltd |  |
Name of Guarantee |  | Woori Bank and others |  |
Value of collateral |  | ₩ 293,400 |  |
Description of assets pledged as collateral description |  | Collateral for borrowings |  |
Finance Lease receivable and property, plant and equipment and others |  |  |  |
Disclsoure of assets pledged as collateral [Line Items] |  |  |  |
Name of Guarantor |  | Qatrana Electric Power Company |  |
Name of Guarantee |  | The Islamic Development Bank and others |  |
Value of collateral | JD |  |  |  | JD 236,570
Description of assets pledged as collateral description | [2] | Collateral for borrowings |  |
Finance Lease receivable and others |  |  |  |
Disclsoure of assets pledged as collateral [Line Items] |  |  |  |
Name of Guarantor |  | KST Electric Power Company |  |
Name of Guarantee |  | The Export - Import Bank of Korea and others |  |
Value of collateral | $ |  |  | $ 337,000 |
Description of assets pledged as collateral description | [2] | Collateral for borrowings |  |
[1] | As of December 31, 2018, the Company has established guarantees for pledge for transfer of rights of long-term borrowings, pledge for insurance claims, pledge for shares, etc.
[2] | This is based on the amount of loan commitment limit.

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