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Other information about investments - Joint arrangements and associates - Refining Marketing and Chemical (Details) | 12 Months Ended |  |
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Dec. 31, 2022 EUR (€) | Dec. 31, 2022 EGP (ج.م.) | Dec. 31, 2022 CHF (SFr) | Dec. 31, 2022 KRW (₩) | Dec. 31, 2022 SGD ($) | Dec. 31, 2022 KZT (₸) | Dec. 31, 2022 TND (د.ت) | Dec. 31, 2022 AED (د.إ) | Dec. 31, 2022 VEF | Dec. 31, 2022 USD ($) | Dec. 31, 2021 EUR (€)
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Share capital | € 4,005,000,000 |  |  |  |  |  |  |  |  |  | € 4,005,000,000
ENI SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Share capital | € 4,005,358,876 |  |  |  |  |  |  |  |  |  | € 4,005,358,876
Refining & Marketing | Italy | Joint Arrangement Or Associate One [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Arezzo Gas SpA (†) |  |  |  |  |  |  |  |  |  |
Registered office | Arezzo |  |  |  |  |  |  |  |  |  |
Country of operation | Italy |  |  |  |  |  |  |  |  |  |
Share capital | € 394,000 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate One [Member] | Ecofuel SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 50.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate One [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 50.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Two [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | CePIM Centro Padano Interscambio Merci SpA |  |  |  |  |  |  |  |  |  |
Registered office | Fontevivo (PR) |  |  |  |  |  |  |  |  |  |
Country of operation | Italy |  |  |  |  |  |  |  |  |  |
Share capital | € 6,642,928.32 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Two [Member] | Ecofuel SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 44.78% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Two [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 55.22% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Three [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Consorzio Operatori GPL di Napoli |  |  |  |  |  |  |  |  |  |
Registered office | Napoli |  |  |  |  |  |  |  |  |  |
Country of operation | Italy |  |  |  |  |  |  |  |  |  |
Share capital | € 102,000 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Co. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Three [Member] | Ecofuel SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 25.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Three [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 75.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Four [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Costiero Gas Livorno SpA (†) |  |  |  |  |  |  |  |  |  |
Registered office | Livorno |  |  |  |  |  |  |  |  |  |
Country of operation | Italy |  |  |  |  |  |  |  |  |  |
Share capital | € 26,000,000 |  |  |  |  |  |  |  |  |  |
% Equity ratio | 65.00% |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | J.O. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Four [Member] | Ecofuel SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 65.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Four [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 35.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Five [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Disma SpA |  |  |  |  |  |  |  |  |  |
Registered office | Segrate (MI) |  |  |  |  |  |  |  |  |  |
Country of operation | Italy |  |  |  |  |  |  |  |  |  |
Share capital | € 2,600,000 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Five [Member] | Ecofuel SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 25.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Five [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 75.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Six [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Porto Petroli di Genova SpA |  |  |  |  |  |  |  |  |  |
Registered office | Genova |  |  |  |  |  |  |  |  |  |
Country of operation | Italy |  |  |  |  |  |  |  |  |  |
Share capital | € 2,068,000 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Six [Member] | Ecofuel SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 40.50% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Six [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 59.50% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Seven [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Raffineria di Milazzo ScpA (†) |  |  |  |  |  |  |  |  |  |
Registered office | Milazzo (ME) |  |  |  |  |  |  |  |  |  |
Country of operation | Italy |  |  |  |  |  |  |  |  |  |
Share capital | € 171,143,000 |  |  |  |  |  |  |  |  |  |
% Equity ratio | 50.00% |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | J.O. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Seven [Member] | ENI SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 50.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Seven [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 50.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Eight [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Seram SpA |  |  |  |  |  |  |  |  |  |
Registered office | Fiumicino (RM) |  |  |  |  |  |  |  |  |  |
Country of operation | Italy |  |  |  |  |  |  |  |  |  |
Share capital | € 852,000 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Eight [Member] | ENI SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 25.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Eight [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 75.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Nine [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Sigea Sistema Integrato Genova Arquata SpA |  |  |  |  |  |  |  |  |  |
Registered office | Genova |  |  |  |  |  |  |  |  |  |
Country of operation | Italy |  |  |  |  |  |  |  |  |  |
Share capital | € 3,326,900 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Nine [Member] | Ecofuel SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 35.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Nine [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 65.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Ten [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Società Oleodotti Meridionali - SOM SpA (†) |  |  |  |  |  |  |  |  |  |
Registered office | Rome |  |  |  |  |  |  |  |  |  |
Country of operation | Italy |  |  |  |  |  |  |  |  |  |
Share capital | € 3,085,000 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Ten [Member] | ENI SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 70.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Ten [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 30.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Eleven [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | South Italy Green Hydrogen Srl (†) |  |  |  |  |  |  |  |  |  |
Registered office | Rome |  |  |  |  |  |  |  |  |  |
Country of operation | Italy |  |  |  |  |  |  |  |  |  |
Share capital | € 10,000 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Eleven [Member] | ENI SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 50.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Italy | Joint Arrangement Or Associate Eleven [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 50.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twelve [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Abu Dhabi Oil Refining Company (TAKREER) |  |  |  |  |  |  |  |  |  |
Registered office | Abu Dhabi (United Arab Emirates) |  |  |  |  |  |  |  |  |  |
Country of operation | United Arab Emirates |  |  |  |  |  |  |  |  |  |
Share capital | د.إ |  |  |  |  |  |  |  | د.إ 500,000,000 |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twelve [Member] | Eni Abu Dhabi R&T |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 20.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twelve [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 80.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Thirteen [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | ADNOC Global Trading Ltd |  |  |  |  |  |  |  |  |  |
Registered office | Abu Dhabi (United Arab Emirates) |  |  |  |  |  |  |  |  |  |
Country of operation | United Arab Emirates |  |  |  |  |  |  |  |  |  |
Share capital | $ |  |  |  |  |  |  |  |  |  | $ 100,000,000 |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Thirteen [Member] | Eni Abu Dhabi R&T |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 20.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Thirteen [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 80.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Fourteen [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | AET - Raffineriebeteiligungsgesellschaft mbH (†) |  |  |  |  |  |  |  |  |  |
Registered office | Schwedt (Germany) |  |  |  |  |  |  |  |  |  |
Country of operation | Germany |  |  |  |  |  |  |  |  |  |
Share capital | € 27,000 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Fourteen [Member] | Eni Deutsch GmbH |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 33.33% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Fourteen [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 66.67% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Fifteen [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Bayernoil Raffineriegesellschaft mbH (†) |  |  |  |  |  |  |  |  |  |
Registered office | Vohburg (Germany) |  |  |  |  |  |  |  |  |  |
Country of operation | Germany |  |  |  |  |  |  |  |  |  |
Share capital | € 10,226,000 |  |  |  |  |  |  |  |  |  |
% Equity ratio | 20.00% |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | J.O. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Fifteen [Member] | Eni Deutsch GmbH |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 20.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Fifteen [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 80.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Sixteen [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | City Carburoil SA (†) |  |  |  |  |  |  |  |  |  |
Registered office | Monteceneri (Switzerland) |  |  |  |  |  |  |  |  |  |
Country of operation | Switzerland |  |  |  |  |  |  |  |  |  |
Share capital | SFr |  |  | SFr 6,000,000 |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Sixteen [Member] | Eni Suisse SA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 49.91% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Sixteen [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 50.09% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Seven teen [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Egyptian International Gas Technology Co |  |  |  |  |  |  |  |  |  |
Registered office | New Cairo (Egypt) |  |  |  |  |  |  |  |  |  |
Country of operation | Egypt |  |  |  |  |  |  |  |  |  |
Share capital | ج.م. |  | ج.م. 100,000,000 |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Seven teen [Member] | Eni International BV |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 40.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Seven teen [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 60.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Eight teen [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | ENEOS Italsing Pte Ltd |  |  |  |  |  |  |  |  |  |
Registered office | Singapore (Singapore) |  |  |  |  |  |  |  |  |  |
Country of operation | Singapore |  |  |  |  |  |  |  |  |  |
Share capital | $ |  |  |  |  | $ 12,000,000 |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Eight teen [Member] | Eni International BV |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 22.50% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Eight teen [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 77.50% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Nine teen [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Fuelling Aviation Services GIE |  |  |  |  |  |  |  |  |  |
Registered office | Tremblay-en-France (France) |  |  |  |  |  |  |  |  |  |
Country of operation | France |  |  |  |  |  |  |  |  |  |
Share capital | € 0 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Co. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Nine teen [Member] | Eni France Sarl |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 25.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Nine teen [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 75.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Mediterranée Bitumes SA |  |  |  |  |  |  |  |  |  |
Registered office | Tunis (Tunisia) |  |  |  |  |  |  |  |  |  |
Country of operation | Tunisia |  |  |  |  |  |  |  |  |  |
Share capital | د.ت |  |  |  |  |  |  | د.ت 1,000,000 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty [Member] | Eni International BV |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 34.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 66.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty one [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Routex BV |  |  |  |  |  |  |  |  |  |
Registered office | Amsterdam (Netherlands) |  |  |  |  |  |  |  |  |  |
Country of operation | Netherlands |  |  |  |  |  |  |  |  |  |
Share capital | € 67,500 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty one [Member] | Eni Sust. Mobility SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 20.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty one [Member] | Routex BV |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 20.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty one [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 60.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty two [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Saraco SA |  |  |  |  |  |  |  |  |  |
Registered office | Meyrin (Switzerland) |  |  |  |  |  |  |  |  |  |
Country of operation | Switzerland |  |  |  |  |  |  |  |  |  |
Share capital | SFr |  |  | SFr 420,000 |  |  |  |  |  |  |  |
Consolidation or valuation method | Co. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty two [Member] | Eni Suisse SA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 20.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty two [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 80.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty three [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Supermetanol CA (†) |  |  |  |  |  |  |  |  |  |
Registered office | Jose Puerto La Cruz (Venezuela) |  |  |  |  |  |  |  |  |  |
Country of operation | Venezuela |  |  |  |  |  |  |  |  |  |
Share capital | VEF |  |  |  |  |  |  |  |  | VEF 0 |  |
% Equity ratio | 50.00% |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | J.O. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty three [Member] | Ecofuel SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 34.51% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty three [Member] | Supermetanol CA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 30.07% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty three [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 35.42% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty four [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | TBG Tanklager Betriebsgesellschaft GmbH (†) |  |  |  |  |  |  |  |  |  |
Registered office | Salzburg (Austria) |  |  |  |  |  |  |  |  |  |
Country of operation | Austria |  |  |  |  |  |  |  |  |  |
Share capital | € 43,603.7 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty four [Member] | Eni Marketing A. GmbH |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 50.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty four [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 50.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty five [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Weat Electronic Datenservice GmbH |  |  |  |  |  |  |  |  |  |
Registered office | Düsseldorf (Germany) |  |  |  |  |  |  |  |  |  |
Country of operation | Germany |  |  |  |  |  |  |  |  |  |
Share capital | € 409,034 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty five [Member] | Eni Deutsch GmbH |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 20.00% |  |  |  |  |  |  |  |  |  |
Refining & Marketing | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty five [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 80.00% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Twenty six [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Brindisi Servizi Generali Scarl |  |  |  |  |  |  |  |  |  |
Registered office | Brindisi |  |  |  |  |  |  |  |  |  |
Country of operation | Italy |  |  |  |  |  |  |  |  |  |
Share capital | € 1,549,060 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Twenty six [Member] | Versalis SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 49.00% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Twenty six [Member] | Eni Rewind SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 20.20% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Twenty six [Member] | EniPower SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 8.90% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Twenty six [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 21.90% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Twenty seven [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | IFM Ferrara ScpA |  |  |  |  |  |  |  |  |  |
Registered office | Ferrara |  |  |  |  |  |  |  |  |  |
Country of operation | Italy |  |  |  |  |  |  |  |  |  |
Share capital | € 5,304,464 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Twenty seven [Member] | S.E.F. Srl |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 10.63% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Twenty seven [Member] | Versalis SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 19.61% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Twenty seven [Member] | Eni Rewind SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 11.51% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Twenty seven [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 58.25% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Twenty eight [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Matrìca SpA (†) |  |  |  |  |  |  |  |  |  |
Registered office | Porto Torres (SS) |  |  |  |  |  |  |  |  |  |
Country of operation | Italy |  |  |  |  |  |  |  |  |  |
Share capital | € 37,500,000 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Twenty eight [Member] | Versalis SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 50.00% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Twenty eight [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 50.00% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Twenty nine [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Novamont SpA |  |  |  |  |  |  |  |  |  |
Registered office | Novara |  |  |  |  |  |  |  |  |  |
Country of operation | Italy |  |  |  |  |  |  |  |  |  |
Share capital | € 20,000,000 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Twenty nine [Member] | Versalis SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 35.00% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Twenty nine [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 65.00% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Thirty [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Priolo Servizi ScpA |  |  |  |  |  |  |  |  |  |
Registered office | Melilli (SR) |  |  |  |  |  |  |  |  |  |
Country of operation | Italy |  |  |  |  |  |  |  |  |  |
Share capital | € 28,100,000 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Thirty [Member] | Versalis SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 37.22% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Thirty [Member] | Eni Rewind SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 5.65% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Thirty [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 57.13% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Thirty one [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Ravenna Servizi Industriali ScpA |  |  |  |  |  |  |  |  |  |
Registered office | Ravenna |  |  |  |  |  |  |  |  |  |
Country of operation | Italy |  |  |  |  |  |  |  |  |  |
Share capital | € 5,597,400 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Thirty one [Member] | Ecofuel SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 1.85% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Thirty one [Member] | Versalis SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 42.13% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Thirty one [Member] | EniPower SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 30.37% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Thirty one [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 25.65% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Thirty two [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Servizi Porto Marghera Scarl |  |  |  |  |  |  |  |  |  |
Registered office | Venezia Marghera (VE) |  |  |  |  |  |  |  |  |  |
Country of operation | Italy |  |  |  |  |  |  |  |  |  |
Share capital | € 8,695,718 |  |  |  |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Thirty two [Member] | Versalis SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 48.44% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Thirty two [Member] | Eni Rewind SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 38.39% |  |  |  |  |  |  |  |  |  |
Chemicals | Italy | Joint Arrangement Or Associate Thirty two [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 13.17% |  |  |  |  |  |  |  |  |  |
Chemicals | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty three [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Lotte Versalis Elastomers Co Ltd (†) |  |  |  |  |  |  |  |  |  |
Registered office | Yeosu (South Korea) |  |  |  |  |  |  |  |  |  |
Country of operation | South Korea |  |  |  |  |  |  |  |  |  |
Share capital | ₩ |  |  |  | ₩ 551,800,000,000 |  |  |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Chemicals | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty three [Member] | Versalis SpA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 50.00% |  |  |  |  |  |  |  |  |  |
Chemicals | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty three [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 50.00% |  |  |  |  |  |  |  |  |  |
Chemicals | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty four [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | Versalis Chem-invest Llp (†) |  |  |  |  |  |  |  |  |  |
Registered office | Uralsk City (Kazakhstan) |  |  |  |  |  |  |  |  |  |
Country of operation | Kazakhstan |  |  |  |  |  |  |  |  |  |
Share capital | ₸ |  |  |  |  |  | ₸ 64,194,000 |  |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Chemicals | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty four [Member] | Versalis International SA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 49.00% |  |  |  |  |  |  |  |  |  |
Chemicals | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty four [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 51.00% |  |  |  |  |  |  |  |  |  |
Chemicals | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty five [Member] |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
Company name | VPM Oilfield Specialty Chemicals Llc (†) |  |  |  |  |  |  |  |  |  |
Registered office | Abu Dhabi(United Arab Emirates) |  |  |  |  |  |  |  |  |  |
Country of operation | United Arab Emirates |  |  |  |  |  |  |  |  |  |
Share capital | د.إ |  |  |  |  |  |  |  | د.إ 1,000,000 |  |  |
Consolidation or valuation method | Eq. |  |  |  |  |  |  |  |  |  |
Chemicals | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty five [Member] | Versalis International SA |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 49.00% |  |  |  |  |  |  |  |  |  |
Chemicals | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty five [Member] | Third parties |  |  |  |  |  |  |  |  |  |  |
Joint arrangements and associates |  |  |  |  |  |  |  |  |  |  |
% Ownership | 51.00% |  |  |  |  |  |  |  |  |  |

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