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Borrowings and Debt Securities : Long-term borrowings (Details) ₨ in Thousands, ¥ in Thousands, Rp in Thousands, JD in Thousands, $ in Thousands, ₩ in Millions | 12 Months Ended |  |
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Dec. 31, 2018 KRW (₩) | Dec. 31, 2017 KRW (₩) | Dec. 31, 2018 JPY (¥) | Dec. 31, 2018 USD ($) | Dec. 31, 2018 JOD (JD) | Dec. 31, 2018 IDR (Rp) | Dec. 31, 2018 PKR (₨) | Dec. 31, 2017 JPY (¥) | Dec. 31, 2017 USD ($) | Dec. 31, 2017 JOD (JD) | Dec. 31, 2017 IDR (Rp) | Dec. 31, 2017 PKR (₨)
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 3,593,009 | ₩ 2,584,280 |  |  |  |  |  |  |  |  |  |
Less : Discount on long-term borrowings | (22,972) | (21,999) |  |  |  |  |  |  |  |  |  |
Less : Current portion of long-term borrowings | (312,994) | (128,543) |  |  |  |  |  |  |  |  |  |
Add : Current portion of discount on long-term borrowings | 972 | 886 |  |  |  |  |  |  |  |  |  |
Long-term borrowings | 3,258,015 | 2,434,624 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 1,914,531 | ₩ 1,380,497 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Korea Development Bank | Korea Development Bank |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Others | Others |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 0.50 | 0.50 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2019~2044 | 2018~2044 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 4,154 | ₩ 4,909 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Korea Development Bank | Korea Development Bank |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 2.45~4.60 | 2.45~4.60 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2023~2028 | 2023~2028 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 66,793 | ₩ 68,883 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor |  | Korea Development Bank |  |  |  |  |  |  |  |  |  |
Purpose of borrowings |  | Facility |  |  |  |  |  |  |  |  |  |
Borrowings interest rate |  | 1yr KoFC bond rate+0.31 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity |  | 2018 |  |  |  |  |  |  |  |  |  |
Borrowings |  | ₩ 25,000 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Korea Development Bank | Korea Development Bank |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Operating funds | Operating funds |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 2.59~3.04 | 2.59~3.04 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2020~2021 | 2018~2020 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 67,000 | ₩ 47,000 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Korea Development Bank | Korea Development Bank |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Operating funds | Operating funds |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 1yr KoFC bond rate+0.95 | 1yr KoFC bond rate+0.95 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2020 | 2020 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 14,000 | ₩ 14,000 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | KEB Hana Bank | KEB Hana Bank |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Commercial Paper | Commercial Paper |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 3M CD+0.24~0.32 | 3M CD+0.24~0.32 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2021~2022 | 2021~2022 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 950,000 | ₩ 400,000 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | KEB Hana Bank | KEB Hana Bank |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 4.60 | 4.60 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2028 | 2028 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 13,781 | ₩ 15,038 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | KEB Hana Bank | KEB Hana Bank |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 3yr KTB rate-1.25 | 3yr KTB rate-1.25 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2019~2028 | 2018~2028 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 8,072 | ₩ 8,947 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | IBK | IBK |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | PF Refinancing | PF Refinancing |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | CD+1.25 | CD+1.25 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2030 | 2030 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 22,500 | ₩ 22,500 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Export-Import Bank of Korea | Export-Import Bank of Korea |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Project loans | Project loans |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 1.5 | 1.5 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2026 | 2026 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 22,096 | ₩ 25,042 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Export-Import Bank of Korea | Export-Import Bank of Korea |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Operating funds | Operating funds |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 2.21 | 2.21 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2020 | 2020 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 35,000 | ₩ 35,000 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Korea Energy Agency | Korea Energy Agency |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Development of power resouces | Development of power resouces |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 3yr KTB rate-2.25 | 3yr KTB rate-2.25 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2023~2025 | 2023~2025 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 5,558 | ₩ 6,765 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Korea Energy Agency | Korea Energy Agency |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 3yr KTB rate-2.25 | 3yr KTB rate-2.25 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2019~2024 | 2018~2024 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 2,589 | ₩ 3,121 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Korea Energy Agency | Korea Energy Agency |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Project loans | Project loans |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | - | - |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2023 | 2022~2025 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 1,197 | ₩ 3,733 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Korea Energy Agency | Korea Energy Agency |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Others | Others |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | KTB rate -2.25 | KTB rate -2.25 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2024~2028 | 2024~2028 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 17,347 | ₩ 18,455 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Shinhan Bank and others | Shinhan Bank and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Collateral borrowing | Collateral borrowing |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 2.32 | 2.32 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2019 | 2019 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 30,000 | ₩ 30,000 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Shinhan Bank and others | Shinhan Bank and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility loan | Facility loan |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | CB rate+1.10 | CB rate+1.10 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2028 | 2028 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 20,672 | ₩ 22,557 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor |  | Shinhan Bank and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings |  | Operating funds |  |  |  |  |  |  |  |  |  |
Borrowings interest rate |  | 2.70 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity |  | 2018 |  |  |  |  |  |  |  |  |  |
Borrowings |  | ₩ 15,000 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Shinhan Bank and others | Shinhan Bank and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Others | Others |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 3.95 | 4.10 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2035 | 2035 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 103,851 | ₩ 105,000 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Shinhan Bank and others | Shinhan Bank and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Others | Others |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | Standard overdraft rate +1.10 | Standard overdraft rate +1.10 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2035 | 2035 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 103,851 | ₩ 105,000 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Kookmin Bank | Kookmin Bank |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | MOR+0.79 | MOR+0.79 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2023 | 2023 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 30,333 | ₩ 35,000 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Kookmin Bank | Kookmin Bank |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 3.16 | 3.16 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2020 | 2020 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 10,000 | ₩ 10,000 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Other Creditors | Other Creditors |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 1.75~4.60 | 1.75~4.60 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2026~2036 | 2026~2029 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 168,080 | ₩ 148,423 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Other Creditors | Other Creditors |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | CB rate+1.10~1.20 | CB rate+1.10~1.20 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2023~2036 | 2022~2028 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 52,810 | ₩ 46,278 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Other Creditors | Other Creditors |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | PF Refinancing | PF Refinancing |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 4.1 | 4.1 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2030 | 2030 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 62,500 | ₩ 62,500 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Other Creditors | Other Creditors |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Others | Others |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 4.50~7.90 | 4.50~8.00 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2022~2039 | 2022~2039 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 102,347 | ₩ 102,346 |  |  |  |  |  |  |  |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 1,678,478 | ₩ 1,203,783 |  |  |  |  |  |  |  |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | SCNT and others |  |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Others |  |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 3.88 |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2021 |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 310,427 |  |  | $ 278,105 |  |  |  |  |  |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Korea Energy Agency | Korea Energy Agency |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Project loans | Project loans |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | - | - |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2021~2023 | 2021~2023 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 9,776 | ₩ 9,368 |  | 8,744 |  |  |  |  | $ 8,744 |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Export-Import Bank of Korea and others | Export-Import Bank of Korea and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Direct loan and others | Direct loan and others |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 1M Libor+1.80~3.20 | 1M Libor+1.80~3.20 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2036 | 2036 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 138,542 | ₩ 69,548 |  | 123,909 |  |  |  |  | 64,913 |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Export-Import Bank of Korea and others | Export-Import Bank of Korea and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Direct loan and others | Direct loan and others |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 3M Libor+2.75~3.70 | 3M Libor+2.75~3.70 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2027 | 2027 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 249,783 | ₩ 254,514 |  |  | JD 158,524 |  |  |  |  | JD 168,663 |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Export-Import Bank of Korea and others | Export-Import Bank of Korea and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Commercial loan and others | Commercial loan and others |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 3M Libor+1.50~2.50 | 3M Libor+1.50~2.50 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2030~2033 | 2030~2033 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 310,315 | ₩ 309,662 |  | 277,538 |  |  |  |  | 289,026 |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Export-Import Bank of Korea and others | Export-Import Bank of Korea and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | PF Loan | PF Loan |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 6M Libor+1.70~2.50 | 6M Libor+1.70~2.50 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2032 | 2032 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 141,773 | ₩ 132,054 |  | 126,798 |  |  |  |  | 123,253 |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | SCNT and others | SCNT and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Shareholder's loan | Shareholder's loan |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 6.50~8.00 | 6.50~8.00 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2023 | 2023 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 49,956 | ₩ 44,697 |  | 44,680 |  |  |  |  | 41,718 |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | SCNT and others | SCNT and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Shareholder's loan | Shareholder's loan |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 8 | 8 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2031 | 2031 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 7,647 | ₩ 7,750 |  |  | JD 4,853 |  |  |  |  | JD 5,136 |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | PT PJB | PT PJB |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Shareholder's loan | Shareholder's loan |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 12.75 | 12.75 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2019 | 2019 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 428 | ₩ 864 |  |  |  | Rp 5,569,304 |  |  |  |  | Rp 10,932,568 |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Samsung Life Insurance and others | Samsung Life Insurance and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Syndicated loan | Syndicated loan |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 3.10 | 3.10 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2032 | 2032 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 53,565 | ₩ 50,540 | ¥ 5,286,835 |  |  |  |  | ¥ 5,325,000 |  |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Woori Bank and others | Woori Bank and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Syndicated loan | Syndicated loan |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | JPY 6M Libor +2.00 | JPY 6M Libor +2.00 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2032 | 2032 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 34,553 | ₩ 32,602 | ¥ 3,410,381 |  |  |  |  | ¥ 3,435,000 |  |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | SMBC and others | SMBC and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Equity Bridge Loan | Equity Bridge Loan |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 1M Libor+0.90 | 1M Libor+0.90 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2019 | 2019 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 49,218 | ₩ 76,054 |  | 44,019 |  |  |  |  | 70,986 |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | IFC and others | IFC and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Others | Others |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 6M Libor+5.00 | 6M Libor+5.00 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2031 | 2031 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 206,944 | ₩ 161,195 |  |  |  |  | ₨ 25,900,420 |  |  |  |  | ₨ 16,652,350
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Federal Financing Bank | Federal Financing Bank |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | PF loan | PF loan |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | 2.39~13 | 2.39 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2031~2038 | 2031 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 114,406 | ₩ 51,819 |  | 102,322 |  |  |  |  | 48,366 |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Other Creditors | Other Creditors |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Others | Others |  |  |  |  |  |  |  |  |  |
Borrowings interest rate | - | - |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2019 | 2019 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 1,145 | ₩ 3,116 |  | $ 1,025 |  |  |  |  | $ 2,907 |  |  |

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