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v3.19.1

Other financial assets (Details Textual) € in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 EUR (€) | Dec. 31, 2017 EUR (€) | Dec. 31, 2017 USD ($)
Disclosure Of Financial Assets Explanatory [Line Items] |  |  |
Other non-current financial assets | € 1,253,000 | € 1,675,000 | $ 1,675
Securities Pledged As Guarantee Of The Deposit For Gas Cylinders |  | 20,000 |
Other current financial assets | 300,000 | 316,000 |
Other financial assets | 1,301,000 | € 1,709,000 |
Non-current financial assets at amortised cost | 1,188,000 |  |
Gas And Power Segment [Member] |  |  |
Disclosure Of Financial Assets Explanatory [Line Items] |  |  |
Other financial assets | 103,000 |  |
Later than five years [member] |  |  |
Disclosure Of Financial Assets Explanatory [Line Items] |  |  |
Other current financial assets | € 1,088,000 |  |
Securities Within Five Years Of Maturity [Member] |  |  |
Disclosure Of Financial Assets Explanatory [Line Items] |  |  |
Securities Maturity Period | Five years |  |
Top of range [member] |  |  |
Disclosure Of Financial Assets Explanatory [Line Items] |  |  |
Discount rate applied to cash flow projections |  | 2.90% | 2.90%
Discount Rate Unobservable Significant Input | 2.50% |  |
Bottom of range [member] |  |  |
Disclosure Of Financial Assets Explanatory [Line Items] |  |  |
Discount rate applied to cash flow projections |  | 0.20% | 0.20%
Discount Rate Unobservable Significant Input | 0.20% |  |
Held to maturity Investments Category [Member] |  |  |
Disclosure Of Financial Assets Explanatory [Line Items] |  |  |
Other non-current financial assets | € 64 | € 73,000 | $ 73
Held to maturity Investments Category [Member] | European Investment Bank Bonds [Member] |  |  |
Disclosure Of Financial Assets Explanatory [Line Items] |  |  |
Other non-current financial assets |  | 4,000 |
Securities held for operating purposes [Member] | Sovereign States Bonds [Member] |  |  |
Disclosure Of Financial Assets Explanatory [Line Items] |  |  |
Other non-current financial assets |  | 69,000 |
Financing receivables held for operating purposes [Member] | Later than five years [member] |  |  |
Disclosure Of Financial Assets Explanatory [Line Items] |  |  |
Other non-current financial assets |  | € 1,393,000 |
Matrica SpA [Member] |  |  |
Disclosure Of Financial Assets Explanatory [Line Items] |  |  |
Proportion of ownership interest in joint venture |  | 50.00% |
Cardon IV SA 1 [Member] |  |  |
Disclosure Of Financial Assets Explanatory [Line Items] |  |  |
Other non-current financial assets |  | € 955,000 |
Other current financial assets | € 705,000 |  |
Joint ventures and associates [Member] |  |  |
Disclosure Of Financial Assets Explanatory [Line Items] |  |  |
Other non-current financial assets |  | € 1,075,000 |

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