XML 318 R212.htm IDEA: XBRL DOCUMENT v3.20.1
Other information about investments - Joint arrangements and associates - Exploration & Production (Details)
 12 Months Ended
Dec. 31, 2019
KWD (د.ك)
Dec. 31, 2019
NOK (kr)
Dec. 31, 2019
AED (د.إ)
Dec. 31, 2019
GBP (£)
Dec. 31, 2019
KZT (₸)
Dec. 31, 2019
MZN (MT)
Dec. 31, 2019
XAF ( )
Dec. 31, 2019
EGP (ج.م.)
Dec. 31, 2019
TND (د.ت)
Dec. 31, 2019
VEF ( )
Dec. 31, 2019
USD ($)
Dec. 31, 2019
EUR (€)
Dec. 31, 2018
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
Exploration & Production | Italy | Joint Arrangement Or Associate One [Member]                          
Joint arrangements and associates                          
Company name Mozambique Rovuma Venture SpA (†)                        
Registered office San Donato Milanese (MI)                        
Country of operation Mozambique                        
Share capital | €                       20,000,000  
% Equity ratio 35.71%                        
Consolidation or valuation method J.O.                        
Exploration & Production | Italy | Joint Arrangement Or Associate One [Member] | ENI SpA                          
Joint arrangements and associates                          
% Ownership 35.71%                        
Exploration & Production | Italy | Joint Arrangement Or Associate One [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 64.29%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Two [Member]                          
Joint arrangements and associates                          
Company name Agiba Petroleum Co (†)                        
Registered office Cairo (Egypt)                        
Country of operation Egypt                        
Share capital               ج.م. 20,000          
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Two [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Two [Member] | Ieoc Production BV                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Three [Member]                          
Joint arrangements and associates                          
Company name Angola LNG Ltd                        
Registered office Hamilton (Bermuda)                        
Country of operation Angola                        
Share capital | $                     $ 9,952,000,000    
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Three [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 86.40%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Three [Member] | Eni Angola Prod BV                          
Joint arrangements and associates                          
% Ownership 13.60%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Four [Member]                          
Joint arrangements and associates                          
Company name Ashrafi Island Petroleum Co                        
Registered office Cairo (Egypt)                        
Country of operation Egypt                        
Share capital               20,000          
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Four [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 75.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Four [Member] | Ieoc Production BV                          
Joint arrangements and associates                          
% Ownership 25.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Five [Member]                          
Joint arrangements and associates                          
Company name Barentsmorneftegaz Sàrl(†)                        
Registered office Luxembourg (Luxembourg)                        
Country of operation Russia                        
Share capital | $                     20,000    
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Five [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 66.67%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Five [Member] | Eni Energy Russia BV                          
Joint arrangements and associates                          
% Ownership 33.33%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Six [Member]                          
Joint arrangements and associates                          
Company name Cabo Delgado Gas Development Limitada(†)                        
Registered office Maputo (Mozambique)                        
Country of operation Mozambique                        
Share capital | MT           MT 2,500,000              
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Six [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Six [Member] | Eni MozamLNG HBV                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Seven [Member]                          
Joint arrangements and associates                          
Company name Cardón IV SA(†)                        
Registered office Caracas (Venezuela)                        
Country of operation Venezuela                        
Share capital |                   172.1      
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Seven [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Seven [Member] | Eni Venezuela BV                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Eight [Member]                          
Joint arrangements and associates                          
Company name Compañia Agua Plana SA                        
Registered office Caracas (Venezuela)                        
Country of operation Venezuela                        
Share capital |                   0.001      
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Eight [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 74.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Eight [Member] | Eni Venezuela BV                          
Joint arrangements and associates                          
% Ownership 26.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Nine [Member]                          
Joint arrangements and associates                          
Company name Coral FLNG SA                        
Registered office Maputo (Mozambique)                        
Country of operation Mozambique                        
Share capital | MT           100,000,000              
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Nine [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 75.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Nine [Member] | Eni MozamLNG HBV                          
Joint arrangements and associates                          
% Ownership 25.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Ten [Member]                          
Joint arrangements and associates                          
Company name Coral South FLNG DMCC                        
Registered office Dubai (United Arab Emirates)                        
Country of operation United Arab Emirates                        
Share capital | د.إ     د.إ 500,000                    
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Ten [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 75.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Ten [Member] | Eni MozamLNG HBV                          
Joint arrangements and associates                          
% Ownership 25.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Eleven [Member]                          
Joint arrangements and associates                          
Company name East Delta Gas Co (in liquidation)                        
Registered office Cairo (Egypt)                        
Country of operation Egypt                        
Share capital               20,000          
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Eleven [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 62.50%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Eleven [Member] | Ieoc Production BV                          
Joint arrangements and associates                          
% Ownership 37.50%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twelve [Member]                          
Joint arrangements and associates                          
Company name East Kanayis Petroleum Co(†)                        
Registered office Cairo (Egypt)                        
Country of operation Egypt                        
Share capital               20,000          
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twelve [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twelve [Member] | Ieoc Production BV                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirteen [Member]                          
Joint arrangements and associates                          
Company name East Obaiyed Petroleum Co(†)                        
Registered office Cairo (Egypt)                        
Country of operation Egypt                        
Share capital               20,000          
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirteen [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirteen [Member] | Ieoc SpA                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Fourteen [Member]                          
Joint arrangements and associates                          
Company name El Temsah Petroleum Co                        
Registered office Cairo (Egypt)                        
Country of operation Egypt                        
Share capital               20,000          
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Fourteen [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 75.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Fourteen [Member] | Ieoc Production BV                          
Joint arrangements and associates                          
% Ownership 25.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Fifteen [Member]                          
Joint arrangements and associates                          
Company name El-Fayrouz Petroleum Co(†) (in liquidation)                        
Registered office Cairo (Egypt)                        
Country of operation Egypt                        
Share capital               20,000          
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Fifteen [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Fifteen [Member] | Ieoc Exploration BV                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Sixteen [Member]                          
Joint arrangements and associates                          
Company name Fedynskmorneftegaz Sàrl(†)                        
Registered office Luxembourg (Luxembourg)                        
Country of operation Russia                        
Share capital | $                     20,000    
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Sixteen [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 66.67%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Sixteen [Member] | Eni Energy Russia BV                          
Joint arrangements and associates                          
% Ownership 33.33%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Seven teen [Member]                          
Joint arrangements and associates                          
Company name Isatay Operating Company Llp(†)                        
Registered office Nur-Sultan (Kazakhstan)                        
Country of operation Kazakhstan                        
Share capital | ₸         ₸ 400,000                
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Seven teen [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Seven teen [Member] | Eni Isatay BV                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Eight teen [Member]                          
Joint arrangements and associates                          
Company name Karachaganak Petroleum Operating BV                        
Registered office Amsterdam (Netherlands)                        
Country of operation Kazakhstan                        
Share capital | €                       20,000  
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Eight teen [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 70.75%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Eight teen [Member] | Agip KarachagBV                          
Joint arrangements and associates                          
% Ownership 29.25%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Nine teen [Member]                          
Joint arrangements and associates                          
Company name Karachaganak Project Development Ltd (KPD)                        
Registered office Reading, Berkshire (United Kingdom)                        
Country of operation United Kingdom                        
Share capital | £       £ 100                  
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Nine teen [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 62.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Nine teen [Member] | Agip KarachagBV                          
Joint arrangements and associates                          
% Ownership 38.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty [Member]                          
Joint arrangements and associates                          
Company name Khaleej Petroleum Co Wll                        
Registered office Safat (Kuwait)                        
Country of operation Kuwait                        
Share capital | د.ك د.ك 250,000                        
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 51.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty [Member] | Eni Middle E Ltd                          
Joint arrangements and associates                          
% Ownership 49.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty one [Member]                          
Joint arrangements and associates                          
Company name Liberty National Development Co Llc                        
Registered office Wilmington (USA)                        
Country of operation USA                        
Share capital | $                     0    
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty one [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 67.50%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty one [Member] | Eni Oil & Gas Inc                          
Joint arrangements and associates                          
% Ownership 32.50%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty two [Member]                          
Joint arrangements and associates                          
Company name Mediterranean Gas Co                        
Registered office Cairo (Egypt)                        
Country of operation Egypt                        
Share capital               20,000          
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty two [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 75.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty two [Member] | Ieoc Production BV                          
Joint arrangements and associates                          
% Ownership 25.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty three [Member]                          
Joint arrangements and associates                          
Company name Meleiha Petroleum Company (†)                        
Registered office Cairo (Egypt)                        
Country of operation Egypt                        
Share capital               20,000          
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty three [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty three [Member] | Ieoc Production BV                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty four [Member]                          
Joint arrangements and associates                          
Company name Mellitah Oil & Gas BV(†)                        
Registered office Amsterdam (Netherlands)                        
Country of operation Libya                        
Share capital | €                       € 20,000  
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty four [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty four [Member] | Eni North Africa BV                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty five [Member]                          
Joint arrangements and associates                          
Company name Nile Delta Oil Co Nidoco                        
Registered office Cairo (Egypt)                        
Country of operation Egypt                        
Share capital               20,000          
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty five [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 62.50%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty five [Member] | Ieoc Production BV                          
Joint arrangements and associates                          
% Ownership 37.50%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty six [Member]                          
Joint arrangements and associates                          
Company name Norpipe Terminal Holdco Ltd                        
Registered office London (United Kingdom)                        
Country of operation Norway                        
Share capital | £       £ 55.69                  
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty six [Member] | ENI SpA                          
Joint arrangements and associates                          
% Ownership 14.20%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty six [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 85.80%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty seven [Member]                          
Joint arrangements and associates                          
Company name North Bardawil Petroleum Co                        
Registered office Cairo (Egypt)                        
Country of operation Egypt                        
Share capital               20,000          
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty seven [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 70.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty seven [Member] | Ieoc Exploration BV                          
Joint arrangements and associates                          
% Ownership 30.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty eight [Member]                          
Joint arrangements and associates                          
Company name North El Burg Petroleum Co                        
Registered office Cairo (Egypt)                        
Country of operation Egypt                        
Share capital               20,000          
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty eight [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 75.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty eight [Member] | Ieoc SpA                          
Joint arrangements and associates                          
% Ownership 25.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty nine [Member]                          
Joint arrangements and associates                          
Company name Petrobel Belayim Petroleum Co(†)                        
Registered office Cairo (Egypt)                        
Country of operation Egypt                        
Share capital               20,000          
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty nine [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Twenty nine [Member] | Ieoc Production BV                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty [Member]                          
Joint arrangements and associates                          
Company name PetroBicentenario SA(†)                        
Registered office Caracas (Venezuela)                        
Country of operation Venezuela                        
Share capital |                   3,790      
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 60.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty [Member] | Eni Lasmo Plc                          
Joint arrangements and associates                          
% Ownership 40.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty one [Member]                          
Joint arrangements and associates                          
Company name PetroJunín SA(†)                        
Registered office Caracas (Venezuela)                        
Country of operation Venezuela                        
Share capital |                   24,021      
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty one [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 60.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty one [Member] | Eni Lasmo Plc                          
Joint arrangements and associates                          
% Ownership 40.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty two [Member]                          
Joint arrangements and associates                          
Company name PetroSucre SA                        
Registered office Caracas (Venezuela)                        
Country of operation Venezuela                        
Share capital |                   2,203      
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty two [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 74.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty two [Member] | Eni Venezuela BV                          
Joint arrangements and associates                          
% Ownership 26.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty three [Member]                          
Joint arrangements and associates                          
Company name Pharaonic Petroleum Co                        
Registered office Cairo (Egypt)                        
Country of operation Egypt                        
Share capital               20,000          
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty three [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 75.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty three [Member] | Ieoc Production BV                          
Joint arrangements and associates                          
% Ownership 25.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty four [Member]                          
Joint arrangements and associates                          
Company name Point Resources FPSO AS                        
Registered office Sandnes (Norway)                        
Country of operation Norway                        
Share capital | kr   kr 150,100,000                      
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty four [Member] | PR FPSO Holding AS                          
Joint arrangements and associates                          
% Ownership 100.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty five [Member]                          
Joint arrangements and associates                          
Company name Point Resources FPSO Holding AS                        
Registered office Sandnes (Norway)                        
Country of operation Norway                        
Share capital | kr   60,000                      
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty five [Member] | Var Energi AS                          
Joint arrangements and associates                          
% Ownership 100.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty six [Member]                          
Joint arrangements and associates                          
Company name Port Said Petroleum Co (†)                        
Registered office Cairo (Egypt)                        
Country of operation Egypt                        
Share capital               20,000          
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty six [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty six [Member] | Ieoc Production BV                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty seven [Member]                          
Joint arrangements and associates                          
Company name PR Jotun DA                        
Registered office Sandnes (Norway)                        
Country of operation Norway                        
Share capital | kr   kr 0                      
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty seven [Member] | PR FPSO Holding AS                          
Joint arrangements and associates                          
% Ownership 5.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty seven [Member] | PR FPSO AS                          
Joint arrangements and associates                          
% Ownership 95.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty eight [Member]                          
Joint arrangements and associates                          
Company name Raml Petroleum Co                        
Registered office Cairo (Egypt)                        
Country of operation Egypt                        
Share capital               20,000          
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty eight [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 77.50%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty eight [Member] | Ieoc Production BV                          
Joint arrangements and associates                          
% Ownership 22.50%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty nine [Member]                          
Joint arrangements and associates                          
Company name Ras Qattara Petroleum Co                        
Registered office Cairo (Egypt)                        
Country of operation Egypt                        
Share capital               20,000          
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty nine [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 62.50%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Thirty nine [Member] | Ieoc Production BV                          
Joint arrangements and associates                          
% Ownership 37.50%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty [Member]                          
Joint arrangements and associates                          
Company name Rovuma Basin LNG Land Limitada(†)                        
Registered office Maputo (Mozambique)                        
Country of operation Mozambique                        
Share capital | MT           140,000              
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 66.67%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty [Member] | Mozamb Rov V SpA                          
Joint arrangements and associates                          
% Ownership 33.33%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty one [Member]                          
Joint arrangements and associates                          
Company name Rovuma LNG Investments (DIFC) Ltd                        
Registered office Maputo (Mozambique)                        
Country of operation Mozambique                        
Share capital | $                     50,000    
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty one [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 75.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty one [Member] | Eni MozamLNG HBV                          
Joint arrangements and associates                          
% Ownership 25.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty two [Member]                          
Joint arrangements and associates                          
Company name Rovuma LNG SA                        
Registered office Maputo (Mozambique)                        
Country of operation Mozambique                        
Share capital | MT           MT 100,000,000              
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty two [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 75.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty two [Member] | Eni MozamLNG HBV                          
Joint arrangements and associates                          
% Ownership 25.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty three [Member]                          
Joint arrangements and associates                          
Company name Shorouk Petroleum Company                        
Registered office Cairo (Egypt)                        
Country of operation Egypt                        
Share capital               20,000          
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty three [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 75.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty three [Member] | Ieoc Production BV                          
Joint arrangements and associates                          
% Ownership 25.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty four [Member]                          
Joint arrangements and associates                          
Company name Société Centrale Electrique du Congo SA                        
Registered office Pointe-Noire (Republic of the Congo)                        
Country of operation Republic of the Congo                        
Share capital |             44,732,000,000            
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty four [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 80.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty four [Member] | Eni Congo SA                          
Joint arrangements and associates                          
% Ownership 20.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty five [Member]                          
Joint arrangements and associates                          
Company name Société Italo Tunisienne d'Exploitation Pétrolière SA(†)                        
Registered office Tunisi (Tunisia)                        
Country of operation Tunisia                        
Share capital | د.ت                 د.ت 5,000,000        
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty five [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty five [Member] | Eni Tunisia BV                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty six [Member]                          
Joint arrangements and associates                          
Company name Sodeps - Société de Developpement et d'Exploitation du Permis du Sud SA(†)                        
Registered office Tunisi (Tunisia)                        
Country of operation Tunisia                        
Share capital | د.ت                 د.ت 100,000        
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty six [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty six [Member] | Eni Tunisia BV                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty seven [Member]                          
Joint arrangements and associates                          
Company name Tecninco Engineering Contractors Llp(†)                        
Registered office Aksai (Kazakhstan)                        
Country of operation Kazakhstan                        
Share capital | ₸         ₸ 29,478,455                
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty seven [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 51.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty seven [Member] | Eni Progetti SpA                          
Joint arrangements and associates                          
% Ownership 49.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty eight [Member]                          
Joint arrangements and associates                          
Company name Thekah Petroleum Co (in liquidation)                        
Registered office Cairo (Egypt)                        
Country of operation Egypt                        
Share capital               20,000          
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty eight [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 75.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty eight [Member] | Ieoc Exploration BV                          
Joint arrangements and associates                          
% Ownership 25.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty nine [Member]                          
Joint arrangements and associates                          
Company name United Gas Derivatives Co                        
Registered office New Cairo (Egypt)                        
Country of operation Egypt                        
Share capital | $                     153,000,000    
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty nine [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 66.67%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Forty nine [Member] | Eni International BV                          
Joint arrangements and associates                          
% Ownership 33.33%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Fifty [Member]                          
Joint arrangements and associates                          
Company name Vår Energi AS(†)                        
Registered office Forus (Norway)                        
Country of operation Norway                        
Share capital | $                     399,425,000    
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Fifty [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 30.40%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Fifty [Member] | Eni International BV                          
Joint arrangements and associates                          
% Ownership 69.60%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Fifty one [Member]                          
Joint arrangements and associates                          
Company name Vår Energi Marine AS                        
Registered office Sandnes (Norway)                        
Country of operation Norway                        
Share capital | $                     $ 61,000,000    
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Fifty one [Member] | Var Energi AS                          
Joint arrangements and associates                          
% Ownership 100.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Fifty two [Member]                          
Joint arrangements and associates                          
Company name VIC CBM Ltd(†)                        
Registered office London (United Kingdom)                        
Country of operation Indonesia                        
Share capital               52,315,912          
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Fifty two [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Fifty two [Member] | Eni Lasmo Plc                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Fifty three [Member]                          
Joint arrangements and associates                          
Company name Virginia Indonesia Co CBM Ltd(†)                        
Registered office London (United Kingdom)                        
Country of operation Indonesia                        
Share capital               25,631,640          
Consolidation or valuation method Eq.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Fifty three [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Fifty three [Member] | Eni Lasmo Plc                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Fifty four [Member]                          
Joint arrangements and associates                          
Company name West Ashrafi Petroleum Co(†) (in liquidation)                        
Registered office Cairo (Egypt)                        
Country of operation Egypt                        
Share capital               ج.م. 20,000          
Consolidation or valuation method Co.                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Fifty four [Member] | Third parties                          
Joint arrangements and associates                          
% Ownership 50.00%                        
Exploration & Production | Foreign (outside Italy) | Joint Arrangement Or Associate Fifty four [Member] | Ieoc Exploration BV                          
Joint arrangements and associates                          
% Ownership 50.00%