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Other information (Details Textual) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 EUR (€)
Eni Gas & Power NV [Member] |
DisclosureOfNotesAndOtherExplanatoryInformationExplanatoryLineItems [Line Items] |
Cash Consideration | € 8
Consideration paid (received) | € 302
Natural gas [Member] | ExxonMobil [Member] |
DisclosureOfNotesAndOtherExplanatoryInformationExplanatoryLineItems [Line Items] |
Percentage of interest in product sold | 25.00%
Cash Consideration | € 2,362
Repayments of borrowings, classified as financing activities | € 264

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