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Other information about investments (Details 1) | 12 Months Ended |  |
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Dec. 31, 2018 EUR (€) | Dec. 31, 2018 USD ($) | Dec. 31, 2018 GBP (£) | Dec. 31, 2018 CHF (SFr) | Dec. 31, 2018 EGP (ج.م.) | Dec. 31, 2018 VEF ( ) | Dec. 31, 2018 TND (د.ت) | Dec. 31, 2018 SGD ($) | Dec. 31, 2018 NGN (₦) | Dec. 31, 2018 UAH (₴) | Dec. 31, 2018 XAF ( ) | Dec. 31, 2018 BRL (R$) | Dec. 31, 2018 ARS ($) | Dec. 31, 2018 RUB (₽) | Dec. 31, 2018 CAD ($) | Dec. 31, 2018 DZD (دج) | Dec. 31, 2017 EUR (€)
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 4,005,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 4,005,000,000
% Ownership |  | 80.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Eni Oil Holdings BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Ecofuel SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | San Donato Milanese (MI) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Italy |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  | € 52,000,000 | $ 394,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries One [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries One [Member] | ENI SPA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Fuel SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Rome |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Italy |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  | € 58,944,310 | 6,642,928.32 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Two [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Two [Member] | ENI SPA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Raffineria di Gela SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Gela (CL) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Italy |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  | € 15,000,000 | 102,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Three [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Three [Member] | ENI SPA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Four [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | SeaPad SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Genova |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Italy |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  | € 12,400,000 | 26,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 65.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Four [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Five [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Servizi Fondo Bombole Metano SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Rome |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Italy |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  | € 13,580,000.20 | 2,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Co. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Five [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Five [Member] | ENI SPA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Six [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Livorno |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Six [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Six [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Seven [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Genova |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 156,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 68.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Seven [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 75.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Seven [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Eight [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Genova |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 2,068,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Eight [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Eight [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Nine [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Milazzo (ME) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 171,143,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Nine [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 89.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Nine [Member] | Eni Oil Holdings BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 11.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Nine [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Nine [Member] | ENI SPA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Ten [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Fiumicino (RM) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 852,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Ten [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 99.93% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Ten [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Ten [Member] | ENI SPA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Eleven [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Genova |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 3,326,900 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Eleven [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Eleven [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Twelve [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | San Donato Milanese (MI) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 3,085,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 70.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Twelve [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Twelve [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Twelve [Member] | ENI SPA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Thirteen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Milazzo (ME) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Thirteen [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Seventeen [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Eighteen [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Nineteen [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 13.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Twenty One [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Twenty Two [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 99.01% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Italy [Member] | Subsidiaries Twenty Two [Member] | Eni Oil Holdings BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 0.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Schwedt (Germany) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 27,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries One [Member] | Eni Deutsch GmbH [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Deutsch.GmbH |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries One [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Vohburg (Germany) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 10,226,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Two [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Two [Member] | Eni Deutsch GmbH [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Deutsch.GmbH |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Two [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Rivera (Switzerland) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | SFr |  |  |  |  | SFr 6,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Three [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Four [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Cairo (Egypt) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | ج.م. |  |  |  |  |  | ج.م. 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Four [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Four [Member] | Eni Oil Holdings BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Oil Holdings BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Four [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Five [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Singapore (Singapore) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  |  |  |  |  |  |  | $ 12,000,000 |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Five [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Five [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Six [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Abu Dhabi Refining & Trading BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Netherlands |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Six [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Six [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Six [Member] | Eni Mineralolh GmbH [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Mineralölh.GmbH |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Seven [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Austria GmbH |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Wien (Austria) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Austria |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 78,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Seven [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Seven [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Eight [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Benelux BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Rotterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Netherlands |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  | € 1,934,040 |  |  |  |  |  | د.ت 1,000,000 |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Eight [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Eight [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Nine [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Deutschland GmbH |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Germany |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 90,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Nine [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Nine [Member] | Eni Oil Holdings BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Eni Oil Holdings BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Nine [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Nine [Member] | Eni Mineralolh GmbH [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Mineralölh.GmbH |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Ten [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Ecuador SA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Quito (Ecuador) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Ecuador |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 103,142.08 |  | 420,000 |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Ten [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Ten [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Eleven [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni France Sàrl |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Lyon (France) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | France |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  | € 56,800,000 |  |  |  |  | 120,867 |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Eleven [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Eleven [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Twelve [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Iberia SLU |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Alcobendas (Spain) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Spain |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 17,299,100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Twelve [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Twelve [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Thirteen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Lubricants Trading (Shanghai) Co Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Shanghai (China) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | China |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 409,034 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Thirteen [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Thirteen [Member] | Eni Deutsch GmbH [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Deutsch.GmbH |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Thirteen [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Fourteen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Marketing Austria GmbH |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Wien (Austria) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Austria |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 19,621,665.23 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Fourteen [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Fifteen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Mineralölhandel GmbH |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Wien (Austria) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Austria |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 34,156,232.06 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Austria GmbH |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Sixteen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Schmiertechnik GmbH |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Wurzburg (Germany) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Germany |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Seventeen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Suisse SA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Lausanne (Switzerland) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Switzerland |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | SFr |  |  |  |  | 102,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Seventeen [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Seventeen [Member] | Eni Oil Holdings BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Oil Holdings BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Eighteen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni USA R&M Co Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Wilmington (USA) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | USA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 11,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Nineteen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Esacontrol SA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Quito (Ecuador) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Ecuador |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 60,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Twenty [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Esain SA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Quito (Ecuador) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Ecuador |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 30,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Twenty One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Oléoduc du Rhône SA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Valais (Switzerland) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Switzerland |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | SFr |  |  |  |  | SFr 7,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Twenty Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | OOO “Eni-Nefto” |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Moscow (Russia) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Russia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | ₽ |  |  |  |  |  |  |  |  |  |  |  |  |  |  | ₽ 1,010,000 |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refining And Marketing [Member] | Outside Italy [Member] | Subsidiaries Twenty Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Tecnoesa SA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Quito (Ecuador) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Ecuador |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 36,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Italy [Member] | Subsidiaries One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Angola SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | San Donato Milanese (MI) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Angola |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Italy [Member] | Subsidiaries Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Mediterranea Idrocarburi SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Gela (CL) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Italy |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 5,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Italy [Member] | Subsidiaries Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Mozambico SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | San Donato Milanese (MI) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Mozambique |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Italy [Member] | Subsidiaries Four [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Timor Leste SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | San Donato Milanese (MI) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | East Timor |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 6,841,517 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Italy [Member] | Subsidiaries Five [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni West Africa SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | San Donato Milanese (MI) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Angola |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Italy [Member] | Subsidiaries Six [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Zubair SpA (in liquidation) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Italy [Member] | Subsidiaries Seven [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | EniProgetti SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Venezia Marghera (VE) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Italy |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 2,064,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Italy [Member] | Subsidiaries Eight [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Floaters SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | San Donato Milanese (MI) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Italy |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 200,120,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Italy [Member] | Subsidiaries Nine [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Ieoc SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | San Donato Milanese (MI) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Egypt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 7,518,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Italy [Member] | Subsidiaries Ten [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Società Petrolifera Italiana SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | San Donato Milanese (MI) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Italy |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 13,877,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 99.96% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 99.96% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Italy [Member] | Subsidiaries Eleven [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 0.04% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Agip Caspian Sea BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Kazakhstan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,005 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Agip Energy and Natural Resources (Nigeria) Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Abuja (Nigeria) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Nigeria |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | ₦ |  |  |  |  |  |  |  |  |  | ₦ 5,000,000 |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Two [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 95.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Two [Member] | Eni Oil Holdings BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Oil Holdings BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Agip Karachaganak BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Kazakhstan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,005 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Four [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Agip Oil Ecuador BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Ecuador |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Five [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Agip Oleoducto de Crudos Pesados BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Ecuador |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Six [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Burren Energy (Bermuda) Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Hamilton (Bermuda) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 12,002 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Burren Energy Plc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Seven [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Burren Energy (Egypt) Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Egypt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | £ 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Burren Energy Plc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Eight [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Burren Energy Congo Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Tortola (British Virgin Islands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Republic of the Congo |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 50,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Burren En.(Berm)Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Nine [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Burren Energy India Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Burren Energy Plc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Ten [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Burren Energy Plc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 28,819,023 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni UK Holding Plc Eni UK Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 99.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Eleven [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Burren Shakti Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Hamilton (Bermuda) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 65,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Burren En. India Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Twelve [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Abu Dhabi BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Thirteen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni AEP Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Pakistan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 73,471,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni UK Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Fourteen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Algeria Exploration BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Algeria |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Fifteen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Algeria Ltd Sàrl |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Luxembourg (Luxembourg) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Algeria |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Oil Holdings BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Sixteen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Algeria Production BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Algeria |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Seventeen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Ambalat Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Indonesia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Indonesia Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Eighteen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni America Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Dover, Delaware (USA) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | USA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 72,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni UHL Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Nineteen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Angola |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Twenty [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Angola Production BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Angola |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Twenty One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Buenos Aires (Argentina) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Argentina |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 24,136,336 |  |  |  |
Shareholders |  | Eni International BV Eni Oil Holdings BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Twenty One [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 95.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Twenty Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Arguni I Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Indonesia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Indonesia Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Twenty Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Australia BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Australia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Twenty Four [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Australia Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Australia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 20,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Twenty Five [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Bahrain BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Netherlands |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 10000.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | SubsidiariesTwenty Six [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni BB Petroleum Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Dover, Delaware (USA) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | USA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Petroleum Co Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | SubsidiariesTwenty Seven [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni BTC Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 23,214,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | SubsidiariesTwenty Eight [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Bukat Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Indonesia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Indonesia Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | SubsidiariesTwenty Nine [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Bulungan BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Indonesia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Thirty [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Canada Holding Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Calgary (Canada) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Canada |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 1,453,200,001 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Thirty One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni CBM Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Indonesia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 2,210,728 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Lasmo Plc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Thirty Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni China BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | China |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Thirty Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Congo SA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Ponit - Noire (Republic of the Congo) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Republic of the Congo |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 17,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni E&P Holding BV Eni Int NA NV sarl Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Thirty Three [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Thirty Three [Member] | Eni E&P [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 99.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Thirty Three [Member] | Eni Int NA NV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Thirty Four [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Côte d’Ivoire Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Ivory Coast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni UK Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | SubsidiariesThirty Five [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Cyprus Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Nicosia (Cyprus) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Cyprus |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 2,006 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Thirty Six [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Denmark BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Greenland |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Thirty Seven [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni do Brasil Investiments em EXploracao e producao de Petroleo Ltda |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Rio de Janeiro (Brazil) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Brazil |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | R$ |  |  |  |  |  |  |  |  |  |  |  |  | R$ 1,593,415,000 |  |  |  |  |
Shareholders |  | Eni International BV Eni Oil Holdings BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Thirty Seven [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 99.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Thirty Seven [Member] | Eni Oil Holdings BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 8212.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Thirty Eight [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni East Ganal Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Indonesia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Indonesia Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Thirty Nine [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni East Sepinggan Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Indonesia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Indonesia Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Forty [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Elgin/ Franklin Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 100 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni UK Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Forty One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Energy Russia BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Netherlands |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Forty Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Exploration & Producton Holding BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Netherlands |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 29,832,777.12 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Forty Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Gabon SA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Libreville (Gabon) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Gabon |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | |  |  |  |  |  |  |  |  |  |  |  | 13,132,000,000 |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Forty Four [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Ganal Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Indonesia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Indonesia Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Forty Five [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Gas & Power LNG Australia BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Australia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Forty Six [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Ghans Exploration and Production Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Accra (Ghana) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Ghana |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 21,412,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Forty Seven [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Hewett Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Aberdeen (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 3,036,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni UK Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Forty Eight [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Hydrocarbons Venezuela Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Venezuela |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 8,050,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Lasmo Plc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Forty Nine [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni India Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | India |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 44,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni UK Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Fifty [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Indonesia Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Indonesia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni ULX Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Fifty One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Indonesia Ots 1 Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Grand Cayman (Cayman Islands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Indonesia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 1.01 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Indonesia Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Fifty Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni International NA NV Sàrl |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Luxembourg (Luxembourg) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 25,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Fifty Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Investments Plc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 750,050,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni SpA Eni UK Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Fifty Three [Member] | ENI SPA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 99.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Fifty Three [Member] | Eni UK Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Fifty Four [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Iran BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Iran |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Fifty Five [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Iraq BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Iraq |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Fifty Six [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Ireland BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Ireland |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Fifty Seven [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Isatay BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Kazakhstan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Fifty Eight [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni JPDA 03-13 Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Australia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 250,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Fifty Nine [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni JPDA 06-105 Pty Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Perth (Australia) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Australia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 80,830,576 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Sixty [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni JPDA 11-106 BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Australia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 50,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Sixty One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Kenya BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Kenya |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Sixty Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Krueng Mane Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Indonesia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Indonesia Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Sixty Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Lasmo Plc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 337,638,724.25 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Investments Plc Eni UK Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Sixty Three [Member] | Eni Investments PK [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 99.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Sixty Four [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Lebanon BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Lebanon |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Sixty Five [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Liberia BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Liberia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Sixty Six [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Liverpool Bal Operating Co Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni UK Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Sixty Seven [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni LNS Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 80,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni UK Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Sixty Eight [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Marketing Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Dover, Delaware (USA) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | USA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Petroleum Co Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Sixty Nine [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Maroc BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Morocco |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Seventy [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni México S. de RL de CV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Lomas De Chapultepec, Mexico City (Mexico) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Mexico |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 3,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV Eni Oil Holdings BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Seventy [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 99.90% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Seventy [Member] | Eni Oil Holdings BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 0.10% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Seventy One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Middle East Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni ULT Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Seventy Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni MOG Ltd (in liquidation) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 220,711,147.50 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Lasmo Plc Eni LNS Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Seventy Two [Member] | Eni Lasmo Plc [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 99.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Seventy Two [Member] | Eni LNS Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Seventy Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Montenegro BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Montenegro |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Seventy Four [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Mozambique Engineering Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni UK Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Seventy Five [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Mozambique LNG Holding BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Netherlands |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Seventy Six [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Muara Bakau BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Indonesia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Seventy Seven [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Myanmar BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Myanmar |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Seventy Eight [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni North Africa BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Libya |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Seventy Nine [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni North Ganal Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Indonesia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Indonesia Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Eighty [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Oil & Gas Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Dover, Delaware (USA) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | USA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 100,800 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni America Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Eighty One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Oil Algeria Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Algeria |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Lasmo Plc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Eighty Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Oil Holdings BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Netherlands |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 450,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni ULX Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Eighty Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Oman BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Oman |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Eighty Four [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Pakistan (M) Ltd Sàrl |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Luxembourg (Luxembourg) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Pakistan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Oil Holdings BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Eighty Five [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Pakistan Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Pakistan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 90,087 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni ULX Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Eighty Six [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Petroleum Co Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Dover, Delaware (USA) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | USA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 156,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni SpA Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Eighty Six [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 36.14% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Eighty Six [Member] | ENI SPA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 63.86% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Eighty Seven [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Petroleum US Llc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Dover, Delaware (USA) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | USA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni BB Petroleum Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Eighty Eight [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Portugal BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Portugal |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Eighty Nine [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Rapak Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Indonesia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Indonesia Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Ninety [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni RD Congo SA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Kinshasa (Democratic Republic of the Congo) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Democratic Republic of the Congo |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 750,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV Eni Oil Holdings BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Ninety [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 99.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Ninety [Member] | Eni Oil Holdings BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 8212.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Ninety One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Rovuma Basin BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Mozambique |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Mozambique LNG H. BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Ninety Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Sharjah BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Netherlands |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Ninety Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni South Africa BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Republic of South Africa |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Ninety Four [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni South China Sea Ltd Sàrl |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Luxembourg (Luxembourg) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | China |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Ninety Five [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni TNS Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Aberdeen (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni UK Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Ninety Six [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Tunisia BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Tunisia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Ninety Seven [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Turkmenistan Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Hamilton (Bermuda) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Turkmenistan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Burren En.(Berm)Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Ninety Eight [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni UHL Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni ULT Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Ninety Nine [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni UK Holding Plc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 424,050,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Lasmo Plc Eni UK Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Ninety Nine [Member] | Eni Lasmo Plc [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 99.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni UK Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 250,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni UKCS Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 100 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni UK Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Ukraine Holdings BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Netherlands |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Ukraine Llc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Kiev (Ukraine) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Ukraine |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | ₴ |  |  |  |  |  |  |  |  |  |  | ₴ 42,004,757.64 |  |  |  |  |  |  |
Shareholders |  | Eni Ukraine Hold.BV Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Three [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 0.01% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Three [Member] | Eni Ikranine Hold BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 99.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Four [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Ukraine Shallow Waters BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Ukraine |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Ukraine Hold.BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Five [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni ULT Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 93,215,492.25 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Lasmo Plc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Six [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni ULX Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 200,010,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni ULT Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Seven [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni US Operating Co Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Dover, Delaware (USA) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | USA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Petroleum Co Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | ubsidiaries Hundred Eight [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni USA Gas Marketing Llc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Dover, Delaware (USA) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | USA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 10,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Marketing Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Nine [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni USA Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Dover, Delaware (USA) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | USA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Oil & Gas Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Ten [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Venezuela BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Venezuela |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Venezuela E&P Holding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Eleven [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Venezuela E&P Holding SA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Bruxelles (Belgium) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Belgium |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 254,057,680 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV Eni Oil Holdings BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Eleven [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 99.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Eleven [Member] | Eni Oil Holdings BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 8212.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twelve [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Ventures Plc (in liquidation) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 278,050,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV Eni Oil Holdings BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Co. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twelve [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 99.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twelve [Member] | Eni Oil Holdings BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 8212.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Thirteen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Vietnam BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Vietnam |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Fourteen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni West Timor Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Indonesia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Indonesia Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Fifteen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eni Yemen Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | £ |  |  |  | £ 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Burren Energy Plc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Sixteen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | EniProgetti Egypt Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Cairo (Egypt) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Egypt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | ج.م. |  |  |  |  |  | ج.م. 50,000 |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | EniProgetti SpA Eni SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Sixteen [Member] | ENI SPA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Sixteen [Member] | Eni Progetti SpA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 99.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Seventeen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Eurl Eni Algérie |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Algiers (Algeria) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Algeria |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | دج |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | دج 1,000,000 |
Shareholders |  | Eni Algeria Ltd Sàrl |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Eighteen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | First Calgary Petroleums LP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Wilmington (USA) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Algeria |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Canada Hold. Ltd FCP Partner Co ULC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Eighteen [Member] | Eni Canada Holding Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 99.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Eighteen [Member] | FCP Canada Hold Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 0.01% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Nineteen [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | First Calgary Petroleums Partner Co ULC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Calgary (Canada) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Canada |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10 |  |
Shareholders |  | Eni Canada Hold. Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Ieoc Exploration BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Egypt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Ieoc Production BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Egypt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | € |  | € 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Lasmo Sanga Sanga Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Hamilton (Bermuda) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Indonesia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 12,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Lasmo Plc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Liverpool Bay Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | London (United Kingdom) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni ULX Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Eq. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Four [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Nigerian Agip CPFA Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Lagos (Nigeria) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Nigeria |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | ₦ |  |  |  |  |  |  |  |  |  | 1,262,500 |  |  |  |  |  |  |  |
Shareholders |  | NAOC Ltd Agip En Nat Res Ltd Nigerian Agip E. Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Co. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Four [Member] | NAOC Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 98.02% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Four [Member] | Agip En Nat Res Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 0.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Four [Member] | Nigerian Agip E Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 0.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Five [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Nigerian Agip Exploration Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Abuja (Nigeria) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Nigeria |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | ₦ |  |  |  |  |  |  |  |  |  | 5,000,000 |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV Eni Oil Holdings BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Five [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 99.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Five [Member] | Eni Oil Holdings BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 0.01% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Six [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Nigerian Agip Oil Co Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Abuja (Nigeria) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Nigeria |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | ₦ |  |  |  |  |  |  |  |  |  | ₦ 1,800,000 |  |  |  |  |  |  |  |
Shareholders |  | Eni International BV Eni Oil Holdings BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Six [Member] | Eni International BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 99.89% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Six [Member] | Eni Oil Holdings BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 0.11% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Seven [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | OOO ‘Eni Energhia’ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Moscow (Russia) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Russia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital | ₽ |  |  |  |  |  |  |  |  |  |  |  |  |  |  | ₽ 2,000,000 |  |  |
Shareholders |  | Eni Energy Russia BV Eni Oil Holdings BV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Equity ratio |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | F.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Seven [Member] | Eni Oil Holdings BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 0.10% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Seven [Member] | Eni Energy Russia BV [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 99.90% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Eight [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Zetah Congo Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Nassau (Bahamas) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Republic of the Congo |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | 300 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Congo SA Burren En.Congo Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Co. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Eight [Member] | Eni Congo SA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 66.67% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Eight [Member] | Burren EnCongo Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 33.33% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Nine [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company name |  | Zetah Kouilou Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered office |  | Nassau (Bahamas) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Country of operation |  | Republic of the Congo |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  | $ 2,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders |  | Eni Congo SA Buren En Congo Ltd Third Parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation or valutation method | [1] | Co. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Nine [Member] | Third parties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 8.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Nine [Member] | Eni Congo SA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 54.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration And Production [Member] | Outside Italy [Member] | Subsidiaries Hundred Twenty Nine [Member] | Burren EnCongo Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
% Ownership |  | 37.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[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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