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Other information about investments (Details 14) € in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 EUR (€) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 EUR (€)
Disclosure of subsidiaries [line items] |  |  |  |
Share capital | € |  | € 4,005 |  | € 4,005
% Ownership |  | 80.00% |  |
Subsidiaries One [Member] | Gas Power [Member] | In Italy [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Company name |  | Eni gas e luce SpA |  |
Registered office |  | San Donato Milanese (MI) |  |
Country of operation |  | Italy |  |
Share capital |  |  | $ 750,000,000 |
Shareholders |  | Eni SpA |  |
% Ownership |  | 100.00% |  |
% Equity ratio |  | 100.00% |  |
Consolidation or valutation method | [1] | F.C. |  |
Subsidiaries One [Member] | Gas Power [Member] | Outside Italy [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Company name |  | Adriaplin Podjetje za distribucijo zemeljskega plina doo Ljubljana |  |
Registered office |  | Ljubljana (Slovenia) |  |
Country of operation |  | Slovenia |  |
Share capital |  |  | 12,956,935 |
Shareholders |  | Eni gas e luce SpA Third parties |  |
% Equity ratio |  | 51.00% |  |
Consolidation or valutation method | [1] | F.C. |  |
Subsidiaries One [Member] | Gas Power [Member] | Outside Italy [Member] | Eni gas e luce SPA [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
% Ownership |  | 51.00% |  |
Subsidiaries One [Member] | Gas Power [Member] | Outside Italy [Member] | Third parties [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
% Ownership |  | 49.00% |  |
Subsidiaries Two [Member] | Gas Power [Member] | In Italy [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Company name |  | Eni Gas Transport Services Srl |  |
Registered office |  | San Donato Milanese (MI) |  |
Country of operation |  | Italy |  |
Share capital |  |  | 120,000 |
Shareholders |  | Eni SpA |  |
% Ownership |  | 100.00% |  |
Consolidation or valutation method | [1] | Co. |  |
Subsidiaries Two [Member] | Gas Power [Member] | Outside Italy [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Company name |  | Eni G&P Trading BV |  |
Registered office |  | Amsterdam (Netherlands) |  |
Country of operation |  | Turkey |  |
Share capital |  |  | 70,000 |
Shareholders |  | Eni International BV |  |
% Ownership |  | 100.00% |  |
% Equity ratio |  | 100.00% |  |
Consolidation or valutation method | [1] | F.C. |  |
Subsidiaries Three [Member] | Gas Power [Member] | In Italy [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Company name |  | Eni Trading & Shipping SpA |  |
Registered office |  | Rome |  |
Country of operation |  | Italy |  |
Share capital |  |  | 60,036,650 |
Shareholders |  | Eni SpA |  |
% Ownership |  | 100.00% |  |
% Equity ratio |  | 100.00% |  |
Consolidation or valutation method | [1] | F.C. |  |
Subsidiaries Three [Member] | Gas Power [Member] | Outside Italy [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Company name |  | Eni Gas & Power France SA |  |
Registered office |  | Levallois Perret (France) |  |
Country of operation |  | France |  |
Share capital |  |  | 29,937,600 |
Shareholders |  | Eni gas e luce SpA Third parties |  |
% Equity ratio |  | 99.87% |  |
Consolidation or valutation method | [1] | F.C. |  |
Subsidiaries Three [Member] | Gas Power [Member] | Outside Italy [Member] | Eni gas e luce SPA [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
% Ownership |  | 99.87% |  |
Subsidiaries Three [Member] | Gas Power [Member] | Outside Italy [Member] | Third parties [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
% Ownership |  | 0.13% |  |
Subsidiaries Four [Member] | Gas Power [Member] | In Italy [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Company name |  | EniPower Mantova SpA |  |
Registered office |  | San Donato Milanese (MI) |  |
Country of operation |  | Italy |  |
Share capital |  |  | 144,000,000 |
Shareholders |  | EniPower SpA Third parties |  |
% Equity ratio |  | 86.50% |  |
Consolidation or valutation method | [1] | F.C. |  |
Subsidiaries Four [Member] | Gas Power [Member] | In Italy [Member] | Eni Power SpA [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
% Ownership |  | 86.50% |  |
Subsidiaries Four [Member] | Gas Power [Member] | In Italy [Member] | Third parties [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
% Equity ratio |  | 13.50% |  |
Subsidiaries Four [Member] | Gas Power [Member] | Outside Italy [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Company name |  | Eni Trading & Shipping Inc |  |
Registered office |  | Dover, Delaware (USA) |  |
Country of operation |  | USA |  |
Share capital |  |  | 36,000,000 |
Shareholders |  | ETS SpA |  |
% Ownership |  | 100.00% |  |
% Equity ratio |  | 100.00% |  |
Consolidation or valutation method | [1] | F.C. |  |
Subsidiaries Five [Member] | Gas Power [Member] | In Italy [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Company name |  | EniPower SpA |  |
Registered office |  | San Donato Milanese (MI) |  |
Country of operation |  | Italy |  |
Share capital |  |  | 944,947,849 |
Shareholders |  | Eni SpA |  |
% Ownership |  | 100.00% |  |
% Equity ratio |  | 100.00% |  |
Consolidation or valutation method | [1] | F.C. |  |
Subsidiaries Five [Member] | Gas Power [Member] | Outside Italy [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Company name |  | Eni Transprte y Suministro Mexico, S. de RL de CV |  |
Registered office |  | Mexico City (Mexico) |  |
Country of operation |  | Mexico |  |
Share capital |  |  | 3,000 |
Shareholders |  | Eni International BV Eni Oil Holdings BV |  |
% Ownership |  | 9990010.00% |  |
Consolidation or valutation method | [1] | Eq. |  |
Subsidiaries Six [Member] | Gas Power [Member] | In Italy [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Company name |  | LNG Shipping SpA |  |
Registered office |  | San Donato Milanese (MI) |  |
Country of operation |  | Italy |  |
Share capital |  |  | 240,900,000 |
Shareholders |  | Eni SpA |  |
% Ownership |  | 100.00% |  |
% Equity ratio |  | 100.00% |  |
Consolidation or valutation method | [1] | F.C. |  |
Subsidiaries Six [Member] | Gas Power [Member] | Outside Italy [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Company name |  | Gas Supply Company Thessaloniki - Thessalia SA |  |
Registered office |  | Thessaloniki (Greece) |  |
Country of operation |  | Greece |  |
Share capital |  |  | 13,761,788 |
Shareholders |  | Eni gas e luce SpA |  |
% Ownership |  | 10000.00% |  |
% Equity ratio |  | 100.00% |  |
Consolidation or valutation method | [1] | F.C. |  |
Subsidiaries Seven [Member] | Gas Power [Member] | In Italy [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Company name |  | Trans Tunisian Pipeline Co SpA |  |
Registered office |  | San Donato Milanese (MI) |  |
Country of operation |  | Tunisia |  |
Share capital |  |  | 1,098,000 |
Shareholders |  | Eni SpA |  |
% Ownership |  | 100.00% |  |
% Equity ratio |  | 100.00% |  |
Consolidation or valutation method | [1] | F.C. |  |
Subsidiaries Seven [Member] | Gas Power [Member] | Outside Italy [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Company name |  | Société de Service du Gazoduc Transtunisien SA - Sergaz SA |  |
Registered office |  | Tunisi (Tunisia) |  |
Country of operation |  | Tunisia |  |
Share capital |  |  | 99,000 |
Shareholders |  | Eni International BV Third parties |  |
% Equity ratio |  | 66.67% |  |
Consolidation or valutation method | [1] | F.C. |  |
Subsidiaries Seven [Member] | Gas Power [Member] | Outside Italy [Member] | Third parties [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
% Ownership |  | 33.33% |  |
Subsidiaries Seven [Member] | Gas Power [Member] | Outside Italy [Member] | Eni International BV [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
% Ownership |  | 66.67% |  |
Subsidiaries Eight [Member] | Gas Power [Member] | Outside Italy [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Company name |  | Societe la Construction du Gazoduc Transtunisien SA - Scogat SA |  |
Registered office |  | Tunisi (Tunisia) |  |
Country of operation |  | Tunisia |  |
Share capital |  |  | $ 200,000 |
Shareholders |  | Eni INternational BV Eni SpA LNG Shipping Spa Trans Tunis P.Co SpA |  |
% Equity ratio |  | 100.00% |  |
Consolidation or valutation method | [1] | F.C. |  |
Subsidiaries Eight [Member] | Gas Power [Member] | Outside Italy [Member] | Eni International BV [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
% Ownership |  | 99.85% |  |
Subsidiaries Eight [Member] | Gas Power [Member] | Outside Italy [Member] | ENI SPA [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
% Ownership |  | 0.05% |  |
Subsidiaries Eight [Member] | Gas Power [Member] | Outside Italy [Member] | LNG Shipping SpA [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
% Ownership |  | 0.05% |  |
Subsidiaries Eight [Member] | Gas Power [Member] | Outside Italy [Member] | Trans Tunis P Co SpA [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
% Ownership |  | 0.05% |  |
[1] | F.C. = full consolidation, J.O. = joint operation, Eq. = equity-accounted, Co. = valued at cost, F.V. = valued at fair value

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