v3.26.1
Other information about investments - Profit and loss and balance sheet related to the principal associates (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of detailed information about investments        
Non-current assets € 88,202 € 102,937    
Total assets 137,069 146,939    
Non-current liabilities 47,987 53,269    
Total liabilities 84,282 91,291    
Net equity 52,787 55,648 € 53,644 € 55,230
Book value of the investment 13,155 14,150 12,630  
Revenues and other income 83,629 91,214 94,816  
Other operating income (expense) 641 (352) 478  
Operating profit (loss) 5,010 5,238 8,257  
Finance income (expense) (819) (599) (473)  
Income (expense) from investments 1,587 1,850 2,444  
Profit (loss) before income taxes 5,778 6,489 10,228  
Income taxes (3,020) (3,725) (5,368)  
Profit 2,758 2,764 4,860  
Other comprehensive income (loss) (5,775) 2,415 (1,551)  
Total other comprehensive income (loss) (3,017) 5,179 3,309  
Profit (loss) attributable to Eni 2,608 2,624 € 4,771  
Abu Dhabi Oil Refining Co (Takreer)        
Disclosure of detailed information about investments        
Current assets 5,730 6,719    
- of which cash and cash equivalent 6 47    
Non-current assets 15,401 18,130    
Total assets 21,131 24,849    
Current liabilities 4,857 3,835    
Non-current liabilities 6,373 9,640    
- of which non-current financial liabilities 5,995 6,543    
Total liabilities 11,230 13,475    
Net equity € 9,901 € 11,374    
Eni's % of the investment 20.00% 20.00%    
Book value of the investment € 1,980 € 2,275    
Revenues and other income 23,417 12,879    
Operating expense (21,341) (11,985)    
Other operating income (expense) (831) (386)    
Depreciation, amortization and impairments (755) (338)    
Operating profit (loss) 490 170    
Finance income (expense) (381) (332)    
Profit (loss) before income taxes 109 (162)    
Income taxes 7      
Profit 116 (162)    
Other comprehensive income (loss) (1,308) 708    
Total other comprehensive income (loss) (1,192) 546    
Profit (loss) attributable to Eni 23 (32)    
Dividends received from the associates 56 269    
Var Energi ASA        
Disclosure of detailed information about investments        
Current assets 1,533 1,219    
- of which cash and cash equivalent 595 268    
Non-current assets 20,705 19,822    
Total assets 22,238 21,041    
Current liabilities 2,316 1,825    
- of which current financial liabilities 199 68    
Non-current liabilities 19,446 18,415    
- of which non-current financial liabilities 5,067 5,795    
Total liabilities 21,762 € 20,240    
Net equity € 476      
Eni's % of the investment 63.04% 63.04%    
Goodwill, Group capital gains and perpetual subordinated bonds € (300) € (505)    
Revenues and other income 7,164 6,884    
Operating expense (1,409) (1,375)    
Depreciation, amortization and impairments (1,888) (1,884)    
Operating profit (loss) 3,867 3,625    
Finance income (expense) 73 (455)    
Profit (loss) before income taxes 3,940 3,170    
Income taxes (3,061) (2,759)    
Profit 879 411    
Other comprehensive income (loss) 80 (125)    
Total other comprehensive income (loss) 959 286    
Profit (loss) attributable to Eni 602 259    
Dividends received from the associates 653 627    
Ithaca Energy Plc        
Disclosure of detailed information about investments        
Current assets 980 946    
- of which cash and cash equivalent 154 170    
Non-current assets 6,194 7,036    
Total assets 7,174 7,982    
Current liabilities 1,242 1,320    
- of which current financial liabilities 62 31    
Non-current liabilities 3,758 3,775    
- of which non-current financial liabilities 1,243 994    
Total liabilities 5,000 5,095    
Net equity € 2,174 € 2,887    
Eni's % of the investment 35.92% 37.17%    
Goodwill, Group capital gains and perpetual subordinated bonds € (295) € (348)    
Book value of the investment 486 725    
Revenues and other income 2,607 703    
Operating expense (815) (134)    
Depreciation, amortization and impairments (824) (367)    
Operating profit (loss) 968 202    
Finance income (expense) (226) (66)    
Profit (loss) before income taxes 742 136    
Income taxes (809) (118)    
Profit (67) 18    
Other comprehensive income (loss) (128) 100    
Total other comprehensive income (loss) (195) 118    
Profit (loss) attributable to Eni (15) 7    
Dividends received from the associates 161 69    
QatarEnergy LNG NFE (5)        
Disclosure of detailed information about investments        
Non-current assets 2,863 2,658    
Total assets 2,863 2,658    
Current liabilities 151 60    
Non-current liabilities 70 67    
Total liabilities 221 127    
Net equity € 2,642 € 2,531    
Eni's % of the investment 25.00% 25.00%    
Book value of the investment € 661 € 633    
Operating expense (12) (6)    
Operating profit (loss) (12) (6)    
Finance income (expense) (2) 1    
Profit (loss) before income taxes (14) (5)    
Income taxes 4 1    
Profit (10) (4)    
Other comprehensive income (loss) (310) 138    
Total other comprehensive income (loss) (320) 134    
Profit (loss) attributable to Eni € (3) (1)    
ADNOC Global Trading Ltd        
Disclosure of detailed information about investments        
Eni's % of the investment 20.00%      
Profit € 481 563    
Other comprehensive income (loss) (106) 48    
Total other comprehensive income (loss) € 375 611    
Coral FLNG SA        
Disclosure of detailed information about investments        
Eni's % of the investment 25.00%      
Profit € (84) (33)    
Other comprehensive income (loss) (104) 57    
Total other comprehensive income (loss) € (188) € 24