v3.26.1
Segment information and information by geographical area (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of operating segments [line items]      
Sales from operations € 82,151 € 88,797 € 93,717
Operating profit 5,010 5,238 8,257
Net provisions for contingencies (1,117) (1,397) (1,369)
Depreciation and amortization (7,349) (7,600) (7,479)
Impairments of tangible and intangible assets and right-of-use assets (1,797) (3,207) (2,262)
Reversals of tangible and intangible assets and right-of-use assets 215 307 460
Write-off of tangible and intangible assets and right-of-use assets (33) (580) (535)
Share of profit (loss) from equity-accounted investments 1,161 866 1,336
Total assets 137,069 146,939  
Equity-accounted investments 13,155 14,150 12,630
Total liabilities 84,282 91,291  
Capital expenditure in tangible and intangible assets 9,229 8,485 9,215
Allocated amounts      
Disclosure of operating segments [line items]      
Total assets 93,888 103,957 99,664
Total liabilities 42,720 45,820 44,866
Operating segments      
Disclosure of operating segments [line items]      
Write-off of tangible and intangible assets and right-of-use assets (33) (579)  
Adjustments of intragroup profits      
Disclosure of operating segments [line items]      
Operating profit 270 (105) 81
Net provisions for contingencies 47 (13) (12)
Depreciation and amortization 35 33 34
Total assets (253) (457) (378)
Total liabilities (90) (49) (56)
Capital expenditure in tangible and intangible assets (40) (23) (19)
Unallocated amounts      
Disclosure of operating segments [line items]      
Total assets 43,181 42,982 42,942
Total liabilities 41,562 45,471 44,096
Exploration & Production      
Disclosure of operating segments [line items]      
Sales from operations 37,109 38,875 37,961
Exploration & Production | Operating segments      
Disclosure of operating segments [line items]      
Sales from operations 50,367 54,440 55,773
Operating profit 6,302 6,715 8,693
Net provisions for contingencies (335) (282) (354)
Depreciation and amortization (6,061) (6,353) (6,271)
Impairments of tangible and intangible assets and right-of-use assets (1,135) (2,385) (1,419)
Reversals of tangible and intangible assets and right-of-use assets 54 182 376
Write-off of tangible and intangible assets and right-of-use assets (30) (576) (531)
Share of profit (loss) from equity-accounted investments 1,116 904 1,012
Total assets 60,407 67,572 64,504
Equity-accounted investments 7,562 8,348 6,780
Total liabilities 19,934 20,627 21,461
Capital expenditure in tangible and intangible assets 6,678 6,055 7,135
Exploration & Production | Adjustments of intragroup profits      
Disclosure of operating segments [line items]      
Sales from operations (13,258) (15,565) (17,812)
Global Gas & LNG Portfolio and Power      
Disclosure of operating segments [line items]      
Sales from operations 13,102 15,061 19,468
Global Gas & LNG Portfolio and Power | Operating segments      
Disclosure of operating segments [line items]      
Sales from operations 17,120 18,876 24,168
Operating profit 1,770 (909) 2,626
Net provisions for contingencies 93 (11) (206)
Depreciation and amortization (279) (267) (295)
Impairments of tangible and intangible assets and right-of-use assets (17) (195) (14)
Reversals of tangible and intangible assets and right-of-use assets 35 94 52
Share of profit (loss) from equity-accounted investments 32 44 49
Total assets 4,988 7,421 7,688
Equity-accounted investments 417 488 534
Total liabilities 4,691 7,230 6,637
Capital expenditure in tangible and intangible assets 109 110 119
Global Gas & LNG Portfolio and Power | Adjustments of intragroup profits      
Disclosure of operating segments [line items]      
Sales from operations (4,018) (3,815) (4,700)
Refining and Chemicals      
Disclosure of operating segments [line items]      
Sales from operations 5,223 5,881 6,188
Refining and Chemicals | Operating segments      
Disclosure of operating segments [line items]      
Sales from operations 18,179 21,210 23,061
Operating profit (2,485) (1,681) (2,121)
Net provisions for contingencies (346) (478) (352)
Depreciation and amortization (146) (161) (142)
Impairments of tangible and intangible assets and right-of-use assets (482) (458) (732)
Reversals of tangible and intangible assets and right-of-use assets 31 3 6
Write-off of tangible and intangible assets and right-of-use assets (1)    
Share of profit (loss) from equity-accounted investments 120 73 381
Total assets 6,377 7,228 7,186
Equity-accounted investments 2,354 2,621 2,724
Total liabilities 4,153 4,253 3,910
Capital expenditure in tangible and intangible assets 663 632 556
Refining and Chemicals | Adjustments of intragroup profits      
Disclosure of operating segments [line items]      
Sales from operations (12,956) (15,329) (16,873)
Enilive      
Disclosure of operating segments [line items]      
Sales from operations 16,337 18,670 18,877
Enilive | Operating segments      
Disclosure of operating segments [line items]      
Sales from operations 19,120 21,139 21,780
Operating profit 499 282 585
Net provisions for contingencies (42) (48) (33)
Depreciation and amortization (294) (284) (261)
Impairments of tangible and intangible assets and right-of-use assets (60) (117) (38)
Reversals of tangible and intangible assets and right-of-use assets 60    
Share of profit (loss) from equity-accounted investments (53) (43) (38)
Total assets 6,117 5,893 6,081
Equity-accounted investments 796 899 858
Total liabilities 3,303 2,995 2,900
Capital expenditure in tangible and intangible assets 468 416 428
Enilive | Adjustments of intragroup profits      
Disclosure of operating segments [line items]      
Sales from operations (2,783) (2,469) (2,903)
Plenitude      
Disclosure of operating segments [line items]      
Sales from operations 10,118 10,124 11,040
Plenitude | Operating segments      
Disclosure of operating segments [line items]      
Sales from operations 10,168 10,179 11,102
Operating profit 153 1,307 (659)
Net provisions for contingencies (43) (81) (73)
Depreciation and amortization (451) (424) (404)
Impairments of tangible and intangible assets and right-of-use assets (7) (1) (7)
Reversals of tangible and intangible assets and right-of-use assets   5  
Write-off of tangible and intangible assets and right-of-use assets (2) (3) (5)
Share of profit (loss) from equity-accounted investments (33) (47) (55)
Total assets 13,622 13,588 12,692
Equity-accounted investments 1,139 1,019 664
Total liabilities 5,490 5,883 5,436
Capital expenditure in tangible and intangible assets 764 887 636
Plenitude | Adjustments of intragroup profits      
Disclosure of operating segments [line items]      
Sales from operations (50) (55) (62)
Total reportable segments      
Disclosure of operating segments [line items]      
Sales from operations 81,889 88,611 93,534
Total reportable segments | Operating segments      
Disclosure of operating segments [line items]      
Sales from operations 114,954 125,844 135,884
Operating profit 6,239 5,714 9,124
Net provisions for contingencies (673) (900) (1,018)
Depreciation and amortization (7,231) (7,489) (7,373)
Impairments of tangible and intangible assets and right-of-use assets (1,701) (3,156) (2,210)
Reversals of tangible and intangible assets and right-of-use assets 180 284 434
Write-off of tangible and intangible assets and right-of-use assets     (536)
Share of profit (loss) from equity-accounted investments 1,182 931 1,349
Total assets 91,511 101,702 98,151
Equity-accounted investments 12,268 13,375 11,560
Total liabilities 37,571 40,988 40,344
Capital expenditure in tangible and intangible assets 8,682 8,100 8,874
Total reportable segments | Adjustments of intragroup profits      
Disclosure of operating segments [line items]      
Sales from operations (33,065) (37,233) (42,350)
Corporate and Other activities      
Disclosure of operating segments [line items]      
Sales from operations 262 186 183
Write-off of tangible and intangible assets and right-of-use assets   (1)  
Corporate and Other activities | Operating segments      
Disclosure of operating segments [line items]      
Operating profit (1,499) (371) (948)
Net provisions for contingencies (491) (484) (339)
Depreciation and amortization (153) (144) (140)
Impairments of tangible and intangible assets and right-of-use assets (96) (51) (52)
Reversals of tangible and intangible assets and right-of-use assets 35 23 26
Write-off of tangible and intangible assets and right-of-use assets     1
Share of profit (loss) from equity-accounted investments (21) (65) (13)
Total assets 2,630 2,712 1,891
Equity-accounted investments 887 775 1,070
Total liabilities 5,239 4,881 4,578
Capital expenditure in tangible and intangible assets € 587 € 408 € 360