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Loans transactions between related parties (Details) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 KRW (₩)
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | ₩ 126,255 |
Changes in Loans receivable transactions between related parties |  |
Loans | 7,664 |
Collection | (39,384) |
Others | 10,729 |
Ending balance | 105,264 |
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 | 0 |
Collection | 0 |
Others | 0 |
Ending balance | 9,396 |
KNOC Nigerian East & West Oil | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 26,341 |
Changes in Loans receivable transactions between related parties |  |
Loans | 229 |
Collection | 0 |
Others | 1,064 |
Ending balance | 27,634 |
KNOC Nigerian East & West Oil | Accumulated impairment [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | (16,551) |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 4,072 |
Others | 6,414 |
Ending balance | (6,065) |
PT Wampu Electric Power | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 13,288 |
Changes in Loans receivable transactions between related parties |  |
Loans | 970 |
Collection | 0 |
Others | 622 |
Ending balance | 14,880 |
PT. Cirebon Electric Power | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 15,436 |
Changes in Loans receivable transactions between related parties |  |
Loans | 1,283 |
Collection | (8,522) |
Others | 499 |
Ending balance | 8,696 |
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 | 0 |
Collection | 0 |
Others | 0 |
Ending balance | 1,413 |
Daehan Wind Power PSC | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 1,211 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | (606) |
Others | (605) |
Ending balance | 0 |
Datang Chifeng Renewable Power | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 7,245 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | (7,440) |
Others | 195 |
Ending balance | 0 |
Nghi Son 2 Power LLC | 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 | 4,566 |
Collection | (4,566) |
Others | 0 |
Ending balance | 0 |
Kelar S.A | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 46,620 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | 2,074 |
Ending balance | 48,694 |
KEPCO SPC Power Corporation | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 17,249 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | (17,715) |
Others | 466 |
Ending balance | 0 |
KODE NOVUS II LLC | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 4,018 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 | [1]
Collection | 0 | [1]
Others | 0 | [1]
Ending balance | 4,018 | [1]
KODE NOVUS II LLC | Accumulated impairment [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | (4,018) |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 | [1]
Collection | 0 | [1]
Others | 0 | [1]
Ending balance | (4,018) | [1]
Chester Solar IV SpA | Gross carrying amount [Member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 4,607 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | (4,607) |
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 | 0 |
Changes in Loans receivable transactions between related parties |  |
Loans | 616 |
Collection | 0 |
Others | 0 |
Ending balance | ₩ 616 |
[1] | The loans of KODE NOVUS II LLC is eliminated because the Company sold all of its shares of KODE NOVUS II LLC during the year ended December 31, 2018 as described in note 20.

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