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Transactions with related parties (Details 1) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Gains |  |  | € 86 |  |  |
Derivative financial instruments |  | € (307) | 837 |  | € (482) |
Joint ventures and associates [Member] | Financing transactions [Member] |  |  |  |  |  |
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Receivables |  | 915 | 1,226 |  | 1,378 |
Payables |  | 564 | 95 |  | 85 |
Guarantees |  | 1,664 | 1,625 |  | 84 |
Charges |  | 281 | 1 |  | 141 |
Gains |  | 115 | 190 |  | 156 |
Derivative financial instruments |  |  |  |  | 27 |
Unconsolidated entities controlled by Eni [Member] | Financing transactions [Member] |  |  |  |  |  |
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Receivables |  | 49 | 61 |  | 46 |
Payables |  | 25 | 61 |  | 106 |
Charges |  |  |  |  | 1 |
Gains |  |  | 1 |  | 1 |
Entities controlled by the Government [Member] | Financing transactions [Member] |  |  |  |  |  |
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Payables |  | 72 | 8 |  |  |
Charges |  | 2 | 3 |  | 3 |
Financing Transactions With Related Parties [Member] | Financing transactions [Member] |  |  |  |  |  |
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Receivables |  | 964 | 1,287 |  | 1,424 |
Payables |  | 661 | 164 |  | 191 |
Guarantees |  | 1,664 | 1,625 |  | 84 |
Charges |  | 283 | 4 |  | 145 |
Gains |  | 115 | 191 |  | 157 |
Derivative financial instruments |  |  |  |  | 27 |
CARDON IV SA [Member] | Joint ventures and associates [Member] | Financing transactions [Member] |  |  |  |  |  |
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Receivables |  | 705 | 955 |  | 1,054 |
Payables |  | 36 |  |  |  |
Gains |  | 95 | 13 |  | 96 |
Coral South FLNG DMCC [Member] | Joint ventures and associates [Member] | Financing transactions [Member] |  |  |  |  |  |
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Guarantees |  | 1,397 | 1,334 |  |  |
Angola LNG Ltd [Member] | Joint ventures and associates [Member] | Financing transactions [Member] |  |  |  |  |  |
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Guarantees |  | 245 | 233 |  |  |
Matrica SpA [Member] | Joint ventures and associates [Member] | Financing transactions [Member] |  |  |  |  |  |
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Receivables |  |  |  |  | 125 |
Charges |  |  |  |  | 93 |
Gains |  |  |  |  | 9 |
Shatskmorneftegaz Sarl [Member] | Joint ventures and associates [Member] | Financing transactions [Member] |  |  |  |  |  |
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Receivables |  |  | 101 |  | 69 |
Charges |  | 267 |  |  | 13 |
Gains |  | 7 | 6 |  | 4 |
Societe Centrale Electrique du Congo SA [Member] | Joint ventures and associates [Member] | Financing transactions [Member] |  |  |  |  |  |
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Receivables |  | 64 | 66 |  | 78 |
Payables |  | 30 | 43 |  |  |
Charges |  | 5 |  |  | 18 |
Saipem Group [Member] | Joint ventures and associates [Member] | Financing transactions [Member] |  |  |  |  |  |
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Payables |  |  | 3 |  |  |
Guarantees |  |  | 56 |  | 82 |
Gains |  |  |  |  | 43 |
Derivative financial instruments |  |  |  |  | 27 |
Coral FLNG SA [Member] | Joint ventures and associates [Member] | Financing transactions [Member] |  |  |  |  |  |
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Receivables |  | 108 | 56 |  |  |
Gains |  |  | 71 |  |  |
Union Fenosa Gas SA [Member] | Joint ventures and associates [Member] | Financing transactions [Member] |  |  |  |  |  |
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Payables |  |  |  |  | 85 |
Eni BTC Ltd [Member] | Unconsolidated entities controlled by Eni [Member] | Financing transactions [Member] |  |  |  |  |  |
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Payables |  |  |  |  | 54 |
Servizi Fondo Bombole Metano SpA [Member] | Unconsolidated entities controlled by Eni [Member] | Financing transactions [Member] |  |  |  |  |  |
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Receivables |  |  | 60 |  |  |
Payables |  |  | 9 |  |  |
Gains |  |  | 1 |  |  |
Other [Member] | Joint ventures and associates [Member] | Financing transactions [Member] |  |  |  |  |  |
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Receivables |  | 38 | 48 | [1] | 52 | [1]
Payables |  | 4 | 49 | [1] |  |
Guarantees |  | 22 | 2 | [1] | 2 | [1]
Charges |  | 9 | 1 | [1] | 17 | [1]
Gains |  | 13 | 14 | [1] | 4 | [1]
Other [Member] | Unconsolidated entities controlled by Eni [Member] | Financing transactions [Member] |  |  |  |  |  |
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Receivables |  | 49 | 1 | [1] | 46 | [1]
Payables |  | 25 | 52 | [1] | 52 | [1]
Charges | [1] |  |  |  | 1 |
Gains | [1] |  |  |  | 1 |
Other [Member] | Entities controlled by the Government [Member] | Financing transactions [Member] |  |  |  |  |  |
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Payables |  | 8 | 8 | [1] |  |
Charges |  | 2 | € 3 | [1] | € 3 | [1]
Var Energi AS [Member] | Joint ventures and associates [Member] | Financing transactions [Member] |  |  |  |  |  |
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Payables |  | 494 |  |  |  |
Enel Group [Member] |  |  |  |  |  |
Disclosure of Transactions with Related Parties [Line Items] |  |  |  |  |  |
Payables |  | € 64 |  |  |  |
[1] | Each individual amount included herein was lower than €50 million.

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