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Investee Companies and other investments (Subsidiaries) (Narrative) (Details) € in Thousands | 1 Months Ended | 12 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 17, 2019 EUR (€) | Mar. 31, 2019 EUR (€) | Dec. 31, 2018 EUR (€) | Jun. 30, 2018 EUR (€) | Jun. 30, 2017 | Jul. 31, 2016 | Dec. 31, 2020 EUR (€) $ / shares | Dec. 31, 2020 EUR (€) | Dec. 31, 2019 EUR (€) | Dec. 31, 2018 EUR (€) | Jan. 27, 2021 EUR (€) | Nov. 30, 2020 EUR (€) | Sep. 30, 2020 EUR (€) | Dec. 20, 2019 Number | Nov. 30, 2019 EUR (€) | Dec. 31, 2017 EUR (€) | Apr. 30, 2017 EUR (€)
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of loan |  |  |  |  |  |  | € 198,169 | € 198,169 | € 93,320 |  |  |  |  |  |  |  |
Acquisition-related costs |  |  |  |  |  |  |  | 60 |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  | € 9,645 | 18,988 | € 18,117 |  |  |  |  |  |  |
Discount rate |  |  |  |  |  |  | 6.00% | 6.00% |  |  |  |  |  |  |  |  |
Equity |  |  | € 76,957 |  |  |  | € 125,026 | € 125,026 | 107,566 | 76,957 |  |  |  |  |  | € 77,500 |
Capital gain |  |  |  |  |  |  |  |  | 18,770 |  |  |  |  |  |  |  |
Ellomay Luxembourg [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred payment received |  |  |  |  |  |  |  |  |  |  | € 1,400 |  |  |  |  |  |
Groen Gas Gelderland B.V [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Green gas production capacity per year |  |  |  |  |  |  |  | 9.5 million |  |  |  |  |  |  |  |  |
Repayment of shares and shareholder loans |  |  |  |  |  |  |  | € 1,567 |  |  |  |  |  |  |  |  |
Repayment of other existing loans |  |  |  |  |  |  |  | 5,897 |  |  |  |  |  |  |  |  |
Amount receivable for subsidy payments |  |  |  |  |  |  |  | € 493 |  |  |  |  |  |  |  |  |
Groen Gas Gelderland B.V [Member] | License [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Green gas production capacity per year |  |  |  |  |  |  |  | 7.5 million |  |  |  |  |  |  |  |  |
Italian indirect wholly-owned subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of loan |  |  |  |  |  |  | 30,725 | € 30,725 |  |  |  |  |  |  |  |  |
Adjusted amount of funds received |  |  |  |  |  |  | 2,300 | 2,300 |  |  |  |  |  |  |  |  |
Aggregate purchase price |  |  |  |  |  |  | 38,700 | 38,700 |  |  |  |  |  |  |  |  |
Fair value of identifiable assets acquired and liabilities assumed |  |  |  |  |  |  | 7,464 | 7,464 |  |  |  |  |  |  |  |  |
Number of subsidiaries sold | Number |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 |  |  |
Indemnification for potential tax liabilities |  |  |  |  |  |  | 250 | 250 |  |  |  |  |  |  |  |  |
Indemnification for potential incentive reduction |  |  |  |  |  |  | € 500 | € 500 |  |  |  |  |  |  |  |  |
Indemnification for potential incentive reduction second |  |  |  |  |  |  |  |  | € 2,100 |  |  |  |  |  |  |  |
Israel Electricity Authority [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Period of concession project |  |  |  |  |  |  |  | 16 years |  |  |  |  |  |  |  |  |
Weighted interest rate |  |  |  |  |  |  | 5.90% | 5.90% |  |  |  |  |  |  |  |  |
Euro [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of loan |  |  |  |  |  |  |  |  |  |  |  | € 750 |  |  |  |  |
Weighted interest rate |  |  |  |  |  |  |  |  |  |  |  | 3.00% |  |  |  |  |
Groen Gas Oude-Tonge Anaerobic Digestion Project [Member] | Euro [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Acquired additional interest subsidiaries |  |  |  |  | 51.00% |  |  |  |  |  |  |  |  |  |  |  |
Ellomay Luxembourg [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of payment of shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |
Ellomay Luxembourg [Member] | Euro [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advance payment |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 1,250 |  |
Additional advance payment |  |  |  |  |  |  |  |  |  |  |  |  | € 304 |  |  |  |
Ellomay Luxembourg [Member] | Biogas [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Acquired additional interest subsidiaries |  |  |  |  |  | 51.00% |  |  |  |  |  |  |  |  |  |  |
Ellomay Luxembourg [Member] | Groen Goor Anaerobic Digestion Project [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Acquired additional interest subsidiaries |  |  |  |  |  | 51.00% |  |  |  |  |  |  |  |  |  |  |
Ludan [Member] | Biogas [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Acquired additional interest subsidiaries |  |  |  |  |  | 49.00% |  |  |  |  |  |  |  |  |  |  |
Talmei Yosef [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Acquired additional interest subsidiaries |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Percentage of financed amount |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Period of plant operate |  |  |  |  |  |  |  | 20 years |  |  |  |  |  |  |  |  |
Electricity produced per KWP | $ / shares |  |  |  |  |  |  | € 0.9631 |  |  |  |  |  |  |  |  |  |
Groen Goor and Groen Gas Oude-Tonge [Member] | Biogas [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of loan |  | € 3,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Acquired additional interest subsidiaries |  | 49.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Talasol [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Acquired additional interest subsidiaries | 24.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate purchase price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 10,000
Output percentage of financial power swap |  |  |  | 80.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Period of financial power swap |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from project finance |  |  | € 177,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
EPC Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed and lump-sum amount |  |  |  | € 192,500 |  |  |  |  |  |  |  |  |  |  |  |  |
Talasol SPA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of payment of shares | 49.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Project financing aggregate amount | € 16,100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred aggregate purchase price | 1,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity | 6,100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment of shares | 4,900 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recognized amount in equity | 6,100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Associated expenses in equity | € 700 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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