v3.26.1
Other information about investments - Subsidiaries - Global Gas & LNG Portfolio and Power (Details)
12 Months Ended
Dec. 31, 2025
Global Gas & LNG Portfolio | Italy | Subsidiaries One [Member]  
Subsidiaries  
Company name Eni Global Energy Markets SpA
Registered office Rome
Country of operation Italy
% Equity ratio 100.00%
Global Gas & LNG Portfolio | Italy | Subsidiaries One [Member] | ENI SpA  
Subsidiaries  
% Ownership 100.00%
Global Gas & LNG Portfolio | Italy | Subsidiaries Two [Member]  
Subsidiaries  
Company name LNG Shipping SpA
Registered office San Donato Milanese (MI)
Country of operation Italy
% Equity ratio 100.00%
Global Gas & LNG Portfolio | Italy | Subsidiaries Two [Member] | ENI SpA  
Subsidiaries  
% Ownership 100.00%
Global Gas & LNG Portfolio | Foreign (outside Italy) | Subsidiaries Three [Member]  
Subsidiaries  
Company name Eni España Comercializadora de Gas SAU
Registered office Madrid (Spain)
Country of operation Spain
% Equity ratio 100.00%
Global Gas & LNG Portfolio | Foreign (outside Italy) | Subsidiaries Three [Member] | ENI SpA  
Subsidiaries  
% Ownership 100.00%
Global Gas & LNG Portfolio | Foreign (outside Italy) | Subsidiaries Four [Member]  
Subsidiaries  
Company name Eni G&P Trading BV
Registered office Amsterdam (Netherlands)
Country of operation Turkey
% Equity ratio 100.00%
Global Gas & LNG Portfolio | Foreign (outside Italy) | Subsidiaries Four [Member] | Eni Netherlands Hold. BV  
Subsidiaries  
% Ownership 100.00%
Global Gas & LNG Portfolio | Foreign (outside Italy) | Subsidiaries Five [Member]  
Subsidiaries  
Company name Eni Gas Liquefaction BV
Registered office Amsterdam (Netherlands)
Country of operation Netherlands
% Equity ratio 100.00%
Global Gas & LNG Portfolio | Foreign (outside Italy) | Subsidiaries Five [Member] | Eni Netherlands Hold. BV  
Subsidiaries  
% Ownership 100.00%
Power | Italy | Subsidiaries One [Member]  
Subsidiaries  
Company name EniPower SpA
Registered office San Donato Milanese (MI)
Country of operation Italy
% Equity ratio 51.00%
Power | Italy | Subsidiaries One [Member] | ENI SpA  
Subsidiaries  
% Ownership 51.00%
Power | Italy | Subsidiaries One [Member] | Third parties  
Subsidiaries  
% Ownership 49.00%
Power | Italy | Subsidiaries Two [Member]  
Subsidiaries  
Company name EniPower Mantova SpA
Registered office San Donato Milanese (MI)
Country of operation Italy
% Equity ratio 44.12%
Power | Italy | Subsidiaries Two [Member] | EniPower SpA  
Subsidiaries  
% Ownership 86.50%
Power | Italy | Subsidiaries Two [Member] | Third parties  
Subsidiaries  
% Ownership 13.50%