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Other information about investments - Joint arrangements and associates - Plenitude & Power (Details) | 12 Months Ended |  |
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Dec. 31, 2023 EUR (€) | Dec. 31, 2023 NOK (kr) | Dec. 31, 2023 PLN (zł) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 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
Plenitude | Italy | Joint Arrangement Or Associate One [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Atis Floating Wind Srl (†) |  |  |  |
Registered office | Milan |  |  |  |
Country of operation | Italy |  |  |  |
Share capital | € 10,000 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate One [Member] | Eni New Energy SpA |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 70.00% |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate One [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 30.00% |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Two [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Bettercity SpA |  |  |  |
Registered office | Bergamo |  |  |  |
Country of operation | Italy |  |  |  |
Share capital | € 4,050,000 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Two [Member] | Eni Plenitude Spa SB |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 50.00% |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Two [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 50.00% |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Three [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Evogy Srl Società Benefit |  |  |  |
Registered office | Seriate (BG) |  |  |  |
Country of operation | Italy |  |  |  |
Share capital | € 11,785.71 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Three [Member] | Evolvere Venture Spa |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 45.45% |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Three [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 54.55% |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Four [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | GreenIT SpA (†) |  |  |  |
Registered office | San Donato Milanese (MI) |  |  |  |
Country of operation | Italy |  |  |  |
Share capital | € 50,000 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Four [Member] | Eni Plenitude Spa SB |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 51.00% |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Four [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 49.00% |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Five [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Hergo Renewables SpA (†) |  |  |  |
Registered office | Milan |  |  |  |
Country of operation | Italy |  |  |  |
Share capital | € 50,000 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Five [Member] | Eni Plenitude Spa SB |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 65.00% |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Five [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 35.00% |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Six [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Krimisa Floating Wind Srl (†) |  |  |  |
Registered office | Milan |  |  |  |
Country of operation | Italy |  |  |  |
Share capital | € 10,000 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Six [Member] | Eni New Energy SpA |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 70.00% |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Six [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 30.00% |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Seven [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Messapia Floating Wind Srl (†) |  |  |  |
Registered office | Milan |  |  |  |
Country of operation | Italy |  |  |  |
Share capital | € 10,000 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Seven [Member] | Eni New Energy SpA |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 70.00% |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Seven [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 30.00% |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Eight [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Renewable Dispatching Srl |  |  |  |
Registered office | Milan |  |  |  |
Country of operation | Italy |  |  |  |
Share capital | € 200,000 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Eight [Member] | Evolvere Venture Spa |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 40.00% |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Eight [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 60.00% |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Nine [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Siel Agrisolare Srl (†) |  |  |  |
Registered office | Cesena (FC) |  |  |  |
Country of operation | Italy |  |  |  |
Share capital | € 10,000 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Nine [Member] | Eni Plen. S&M Italia Srl |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 51.00% |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Nine [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 49.00% |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Ten [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Tate Srl |  |  |  |
Registered office | Bologna |  |  |  |
Country of operation | Italy |  |  |  |
Share capital | € 408,509.29 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Ten [Member] | Evolvere Venture Spa |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 36.00% |  |  |  |
Plenitude | Italy | Joint Arrangement Or Associate Ten [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 64.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Eleven [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Bluebell Solar Class A Holdings II Llc |  |  |  |
Registered office | Wilmington (USA) |  |  |  |
Country of operation | USA |  |  |  |
Share capital | $ |  |  |  | $ 82,351,634 |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Eleven [Member] | Eni New Energy US Inc |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 99.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Eleven [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 1.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twelve [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Clarensac Solar SAS |  |  |  |
Registered office | Fuveau (France) |  |  |  |
Country of operation | France |  |  |  |
Share capital | € 25,000 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twelve [Member] | Eni Plen. Op. Fr. SAS |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 40.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twelve [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 60.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Thirteen [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Enera Conseil SAS (†) |  |  |  |
Registered office | Clichy (France) |  |  |  |
Country of operation | France |  |  |  |
Share capital | € 9,690 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Thirteen [Member] | Eni G and P France Sa |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 51.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Thirteen [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 49.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Fourteen [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | EnerOcean SL (†) |  |  |  |
Registered office | Malaga (Spain) |  |  |  |
Country of operation | Spain |  |  |  |
Share capital | € 493,320 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Fourteen [Member] | Eni Plenitude Spa SB |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 37.70% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Fourteen [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 62.30% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Fifteen [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Evacuación San Serván 400 SL (†) |  |  |  |
Registered office | Madrid (Spain) |  |  |  |
Country of operation | Spain |  |  |  |
Share capital | € 3,000 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Fifteen [Member] | Renopool 1 SLU |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 68.77% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Fifteen [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 31.23% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Sixteen [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Guillena 400 Promotores SL (†) |  |  |  |
Registered office | Seville (Spain) |  |  |  |
Country of operation | Spain |  |  |  |
Share capital | € 3,000 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Sixteen [Member] | Almazara Solar SLU |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 6.99% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Sixteen [Member] | Atlante Solar SLU |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 6.99% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Sixteen [Member] | Chapitel Solar SLU |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 6.99% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Sixteen [Member] | Fortaleza Solar SLU |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 6.99% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Sixteen [Member] | Garita Solar SLU |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 6.99% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Sixteen [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 65.05% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement or Associate Seventeen [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Infraestructuras San Serván SET 400 SL (†) |  |  |  |
Registered office | Madrid (Spain) |  |  |  |
Country of operation | Spain |  |  |  |
Share capital | € 90,000 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement or Associate Seventeen [Member] | Renopool 1 SLU |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 42.31% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement or Associate Seventeen [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 57.69% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Eighteen [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Instalaciones San Serván II 400 SL (†) |  |  |  |
Registered office | Madrid (Spain) |  |  |  |
Country of operation | Spain |  |  |  |
Share capital | € 11,026 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Eighteen [Member] | Renopool 1 SLU |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 52.38% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Eighteen [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 47.62% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Nineteen [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Novis Renewables Holdings Llc |  |  |  |
Registered office | Wilmington (USA) |  |  |  |
Country of operation | USA |  |  |  |
Share capital | $ |  |  |  | 100 |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Nineteen [Member] | Eni New Energy US Inc |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 49.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Nineteen [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 51.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Novis Renewables Llc (†) |  |  |  |
Registered office | Wilmington (USA) |  |  |  |
Country of operation | USA |  |  |  |
Share capital | $ |  |  |  | $ 100 |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty [Member] | Eni New Energy US Inc |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 50.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 50.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty one [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Parc Tramuntana SL (†) |  |  |  |
Registered office | Madrid (Spain) |  |  |  |
Country of operation | Spain |  |  |  |
Share capital | € 3,500 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty one [Member] | Eni Plenitude Spa SB |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 50.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty one [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 50.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty two [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Parque Eolico Marino La Janda SL (†) |  |  |  |
Registered office | Jerez de La Frontera (Spain) |  |  |  |
Country of operation | Spain |  |  |  |
Share capital | € 3,000 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty two [Member] | Eni Plenitude Spa SB |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 50.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty two [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 50.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty three [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Parque Eolico Marino Nordes SL (†) |  |  |  |
Registered office | Madrid (Spain) |  |  |  |
Country of operation | Spain |  |  |  |
Share capital | € 3,000 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty three [Member] | Eni Plenitude Spa SB |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 50.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty three [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 50.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty four [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Parque Eolico Marino Tarahal SL (†) |  |  |  |
Registered office | Las Palmas de Gran Canaria (Spain) |  |  |  |
Country of operation | Spain |  |  |  |
Share capital | € 3,000 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty four [Member] | Eni Plenitude Spa SB |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 50.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty four [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 50.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty five [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | POW - Polish Offshore Wind-Co Sp zoo (†) |  |  |  |
Registered office | Warsaw (Poland) |  |  |  |
Country of operation | Poland |  |  |  |
Share capital | zł |  |  | zł 5,000 |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty five [Member] | Eni En. Solutions BV |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 95.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty five [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 5.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty six [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Promotores Caparacena 400 SL |  |  |  |
Registered office | Madrid (Spain) |  |  |  |
Country of operation | Spain |  |  |  |
Share capital | € 3,000 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty six [Member] | Ladronera Solar SLU |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 8.21% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty six [Member] | Boceto Solar SLU |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 7.30% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty six [Member] | Cornisa Solar SLU |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 7.30% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty six [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 77.19% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty seven [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Tramuntana Energy LAB SL (†) |  |  |  |
Registered office | Cerdanyola del Valles (Spain) |  |  |  |
Country of operation | Spain |  |  |  |
Share capital | € 3,000 |  |  |  |
Consolidation or valuation method | Eq. |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty seven [Member] | Eni Plenitude Spa SB |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 50.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty seven [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 50.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty eight [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Vårgrønn AS (†) |  |  |  |
Registered office | Stavanger (Norway) |  |  |  |
Country of operation | Norway |  |  |  |
Share capital | kr |  | kr 600,000 |  |  |
Consolidation or valuation method | Eq |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty eight [Member] | Eni En. Solutions BV |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 65.00% |  |  |  |
Plenitude | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty eight [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 35.00% |  |  |  |
Power | Italy | Joint Arrangement Or Associate One [Member] |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
Company name | Società EniPower Ferrara Srl (†) |  |  |  |
Registered office | San Donato Milanese (MI) |  |  |  |
Country of operation | Italy |  |  |  |
Share capital | € 140,000,000 |  |  |  |
% Equity ratio | 26.01% |  |  |  |
Consolidation or valuation method | J.O. |  |  |  |
Power | Italy | Joint Arrangement Or Associate One [Member] | EniPower SpA |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 51.00% |  |  |  |
Power | Italy | Joint Arrangement Or Associate One [Member] | Third parties |  |  |  |  |
Joint arrangements and associates |  |  |  |  |
% Ownership | 49.00% |  |  |  |

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