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Loans transactions between related parties (Details) ₩ in Millions | 12 Months Ended
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Dec. 31, 2019 KRW (₩)
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | ₩ 105,264 |
Changes in Loans receivable transactions between related parties |  |
Loans | 55,834 |
Collection | (44,144) |
Others | 3,069 |
Ending balance | 120,023 |
Hyundai Energy | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 2,465 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | 0 |
Ending balance | 2,465 |
Hyundai Energy | Accumulated impairment [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | (2,465) |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | 0 |
Ending balance | (2,465) |
Gunsan Bio Energy Co., Ltd. | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 9,396 |
Changes in Loans receivable transactions between related parties |  |
Loans | 3,000 |
Collection | 0 |
Others | 0 |
Ending balance | 12,396 |
Gunsan Bio Energy Co., Ltd. | Accumulated impairment [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 0 |
Changes in Loans receivable transactions between related parties |  |
Loans | (10,128) |
Collection | 0 |
Others | 0 |
Ending balance | (10,128) |
KNOC Nigerian East & West Oil | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 27,634 |
Changes in Loans receivable transactions between related parties |  |
Loans | 132 |
Collection | 0 |
Others | 910 |
Ending balance | 28,676 |
KNOC Nigerian East & West Oil | Accumulated impairment [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | (6,065) |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | (1,260) |
Ending balance | (7,325) |
PT Wampu Electric Power | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 14,880 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | 1,622 |
Ending balance | 16,502 |
PT. Cirebon Electric Power | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 8,696 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | (8,900) |
Others | 782 |
Ending balance | 578 |
Xe-Pian Xe-Namnoy Power | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 1,413 |
Changes in Loans receivable transactions between related parties |  |
Loans | 20,148 |
Collection | 0 |
Others | (606) |
Ending balance | 20,955 |
Kelar S.A | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 48,694 |
Changes in Loans receivable transactions between related parties |  |
Collection | (8,320) |
Others | 1,784 |
Ending balance | 42,158 |
Chester Solar IV SpA | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 0 |
Changes in Loans receivable transactions between related parties |  |
Loans | 1,688 |
Collection | (1,688) |
Others | 0 |
Ending balance | 0 |
Chun-cheon Energy Co., Ltd. | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 616 |
Changes in Loans receivable transactions between related parties |  |
Loans | 4,441 |
Collection | 0 |
Others | 0 |
Ending balance | 5,057 |
RECURSOS SOLARES PV DE MEXICO II, S.A. DE C.V. | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 0 |
Changes in Loans receivable transactions between related parties |  |
Loans | 1,054 |
Collection | 0 |
Others | 1 |
Ending balance | 1,055 |
HORUS SOLAR, S.A. DE C.V. | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 0 |
Changes in Loans receivable transactions between related parties |  |
Loans | 3,320 |
Collection | 0 |
Others | 3 |
Ending balance | 3,323 |
SUNMEX RENOVABLES, S.A. DE C.V. | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 0 |
Changes in Loans receivable transactions between related parties |  |
Loans | 144 |
Collection | 0 |
Others | 0 |
Ending balance | 144 |
Chester Solar V SpA | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 0 |
Changes in Loans receivable transactions between related parties |  |
Loans | 535 |
Collection | (535) |
Others | 0 |
Ending balance | 0 |
Diego de Almagro Solar SpA | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 0 |
Changes in Loans receivable transactions between related parties |  |
Loans | 2,101 |
Collection | (2,101) |
Others | 0 |
Ending balance | 0 |
Dangjin Eco Power Co., Ltd.(before the spin-off) | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 0 |
Changes in Loans receivable transactions between related parties |  |
Loans | 2,600 |
Collection | (2,600) |
Others | 0 |
Ending balance | 0 |
DE Energia SpA | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 0 |
Changes in Loans receivable transactions between related parties |  |
Loans | 6,799 |
Collection | 0 |
Others | (167) |
Ending balance | 6,632 |
Eumseong Natural Gas Power Co., Ltd. | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 0 |
Changes in Loans receivable transactions between related parties |  |
Loans | 20,000 | [1]
Collection | (20,000) | [1]
Others | 0 | [1]
Ending balance | ₩ 0 | [1]
[1] | Eumseong Natural Gas Power Co., Ltd. was established by spin-off from Dangjin Eco Power Co., Ltd. and merged by the Company during the year ended December 31, 2019.

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