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Investee Companies and other investments (Pumped Storage Projects) (Narrative) (Details) € in Thousands, ₪ in Thousands |  |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 02, 2017 EUR (€) | Mar. 03, 2017 EUR (€) | Nov. 03, 2014 | Dec. 27, 2017 ILS (₪) | Dec. 27, 2017 EUR (€) | Jul. 31, 2014 ILS (₪) | Jul. 31, 2014 EUR (€) | May 20, 2014 | Jan. 28, 2014 | Jan. 19, 2014 | Nov. 30, 2013 ILS (₪) Installment | Nov. 30, 2013 EUR (€) Installment | Jul. 17, 2013 ILS (₪) | Dec. 31, 2017 ILS (₪) | Dec. 31, 2017 EUR (€) | Dec. 31, 2016 ILS (₪) | Dec. 31, 2016 EUR (€) | Jul. 17, 2013 EUR (€)
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 44,864 |  | € 17,737 |
Repayment of loan and accrued interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,892) |  |  |
NIS [Member] | Kochav Hayarden's [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Claims damages | ₪ |  |  |  | ₪ 4,238 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Euro [Member] | Kochav Hayarden's [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Claims damages |  |  |  |  | € 1,020 |  |  |  |  |  |  |  |  |  |  |  |  |
Euro [Member] | Kochav Pumped Storage [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Claims damages |  |  |  |  | 1,020 |  |  |  |  |  |  |  |  |  |  |  |  |
Pumped Storage Projects [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of Acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 825 |  |  |
Remaining amount of Acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14,882 |  |  |
Pumped Storage Projects [Member] | NIS [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of Acquisition | ₪ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | ₪ 3,400 |  |
Remaining amount of Acquisition | ₪ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | ₪ 61,800 |  |
Erez Electricity Ltd [Member] | Pumped Storage Projects [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of share capital holds |  |  |  |  |  |  |  |  |  |  |  |  | 24.00% |  |  |  |  |
Amount of loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 164
Repayment of loan and accrued interest |  |  |  |  |  |  |  |  |  |  |  | € 200 |  |  |  |  |  |
Additional compensation aggregate amount |  |  |  |  |  |  |  |  |  |  |  | € 1,400 |  |  |  |  |  |
Number of installments | Installment |  |  |  |  |  |  |  |  |  |  | 2 | 2 |  |  |  |  |  |
Erez Electricity Ltd [Member] | Pumped Storage Projects [Member] | First Installment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation paid |  |  |  |  |  |  |  |  |  |  |  | € 250 |  |  |  |  |  |
Compensation received |  |  |  |  |  |  | € 260 |  |  |  |  |  |  |  |  |  |  |
Erez Electricity Ltd [Member] | Pumped Storage Projects [Member] | Second Installment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation paid |  |  |  |  |  |  |  |  |  |  |  | € 1,160 |  |  |  |  |  |
Compensation received |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 1,249 |  |  |
Erez Electricity Ltd [Member] | Pumped Storage Projects [Member] | NIS [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of loan | ₪ |  |  |  |  |  |  |  |  |  |  |  |  | ₪ 770 |  |  |  |  |
Repayment of loan and accrued interest | ₪ |  |  |  |  |  |  |  |  |  |  | ₪ 1,000 |  |  |  |  |  |  |
Additional compensation aggregate amount | ₪ |  |  |  |  |  |  |  |  |  |  | 6,700 |  |  |  |  |  |  |
Erez Electricity Ltd [Member] | Pumped Storage Projects [Member] | NIS [Member] | First Installment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation paid | ₪ |  |  |  |  |  |  |  |  |  |  | 1,200 |  |  |  |  |  |  |
Compensation received | ₪ |  |  |  |  |  | ₪ 1,200 |  |  |  |  |  |  |  |  |  |  |  |
Erez Electricity Ltd [Member] | Pumped Storage Projects [Member] | NIS [Member] | Second Installment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation paid | ₪ |  |  |  |  |  |  |  |  |  |  | ₪ 5,500 |  |  |  |  |  |  |
Compensation received | ₪ |  |  |  |  |  |  |  |  |  |  |  |  |  | ₪ 5,188 |  |  |  |
Galilee Development Cooperative Ltd. [Member] | Pumped Storage Projects [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of acquire cooperatives holdings |  |  |  |  |  |  |  |  |  | 24.75% |  |  |  |  |  |  |  |
Ortam's holdings [Member] | Pumped Storage Projects [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of acquire cooperatives holdings |  |  |  |  |  |  |  |  | 24.75% | 25.00% |  |  |  |  |  |  |  |
EPC [Member] | Pumped Storage Projects [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of acquire cooperatives holdings |  |  | 50.00% |  |  |  |  | 50.00% | 50.00% | 50.00% |  |  |  |  |  |  |  |
Chashgal Elyon Ltd. [Member] | Pumped Storage Projects [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of acquire cooperatives holdings |  |  |  |  |  |  |  | 25.00% | 25.00% |  |  |  |  |  |  |  |  |
Electra's holdings [Member] | Pumped Storage Projects [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of share capital holds |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of acquire cooperatives holdings |  |  | 75.00% |  |  |  |  | 24.75% |  |  |  |  |  |  |  |  |  |
Sheva Mizrakot Ltd [Member] | Pumped Storage Projects [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of acquire cooperatives holdings |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ellomay Pumped Storage [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of subsidiary owned |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 75.00% |  |
Licence period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 72 months |  |
Ellomay Pumped Storage [Member] | NIS [Member] | Kochav Hayarden's [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Obligated post bond for damages | € 2,000 | € 10,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Kochav Pumped Storage [Member] | NIS [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Claims damages |  |  |  |  | € 4,200 |  |  |  |  |  |  |  |  |  |  |  |  |

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