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Derivative financial instruments (Details Textual) - EUR (€) € in Millions | Dec. 31, 2017 | Dec. 31, 2016
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DisclosureOfDerivativeFinancialInstrumentsLineItems [Line Items] |  |
Options Embedded In Convertible Bonds | € 16 | € 46
Financial derivatives set off against financial derivatives subject to offsetting, enforceable master netting arrangements or similar agreements | 1,279 | 1,281
Eni Trading & Shipping SPA [Member] |  |
DisclosureOfDerivativeFinancialInstrumentsLineItems [Line Items] |  |
Financial derivatives set off against financial derivatives subject to offsetting, enforceable master netting arrangements or similar agreements | 1,144 | 1,145
Eni Trading & Shipping Inc [Member] |  |
DisclosureOfDerivativeFinancialInstrumentsLineItems [Line Items] |  |
Financial derivatives set off against financial derivatives subject to offsetting, enforceable master netting arrangements or similar agreements | € 135 | € 136

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- References No definition available. + Details
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- Definition The amount of financial derivatives set off against financial derivatives subject to off-setting enforceable master netting arrangements or similar agreements. + References No definition available. + Details
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- Definition It represents options embedded in convertible bonds. + References No definition available. + Details
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- Details
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- Details
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