v3.26.1
Other information about investments - Additional (Details) - EUR (€)
€ in Millions
1 Months Ended 12 Months Ended 13 Months Ended
Nov. 04, 2025
Apr. 11, 2025
Mar. 31, 2025
Mar. 06, 2025
Mar. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Mar. 31, 2025
Dec. 31, 2023
Disclosure of detailed information about investments                  
Non-controlling interest           € 4,847 € 2,863    
Change in non‐controlling interest           5,072 588    
Consideration           € 234 2,060   € 1,432
Enilive Group                  
Disclosure of detailed information about investments                  
Proportion of ownership interest in subsidiary (as a percent)           70.00%      
Non-controlling interest           € 860      
Percentage of ownership interest divested   5.00%   25.00%          
Proceeds from non‐controlling interest   € 601   € 2,968          
Non controlling interest (%) (as a percent)           30.00%      
Change in non‐controlling interest       € 500          
Eni Marine Services SpA                  
Disclosure of detailed information about investments                  
Non-controlling interest           € 1,701 1,924    
EniPower Group                  
Disclosure of detailed information about investments                  
Proportion of ownership interest in subsidiary (as a percent)           51.00%      
Non-controlling interest           € 457 € 446    
Non controlling interest (%) (as a percent)           49.00% 49.00%    
Eni Plenitude Group                  
Disclosure of detailed information about investments                  
Proportion of ownership interest in subsidiary (as a percent)           70.00%      
Non-controlling interest           € 1,816 € 491    
Percentage of ownership interest divested 20.00%   10.00%            
Non controlling interest (%) (as a percent)           30.00% 7.58%    
Change in non‐controlling interest € 2,003   € 209   € 588     € 800