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Investments (Tables) | 12 Months Ended
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Dec. 31, 2023
Investments |
Schedule of equity accounted investments |
| 2023 |  |  | 2022 |
| Investments in unconsolidated entities controlled by Eni |  |  | Joint ventures |  |  | Associates |  |  | Total |  |  | Investments in unconsolidated entities controlled by Eni |  |  | Joint ventures |  |  | Associates |  |  | Total |
Carrying amount - beginning of the year | 50 |  |  | 7,065 |  |  | 4,977 |  |  | 12,092 |  |  | 44 |  |  | 2,057 |  |  | 3,786 |  |  | 5,887 |
Additions and subscriptions | 3 |  |  | 1,024 |  |  | 186 |  |  | 1,213 |  |  | 21 |  |  | 900 |  |  | 686 |  |  | 1,607 |
Divestments and reimbursements |  |  |  |  |  |  |  |  |  |  |  |  | (2 | ) |  | (1 | ) |  | (477 | ) |  | (480 | )
Share of profit of equity-accounted investments | 4 |  |  | 818 |  |  | 800 |  |  | 1,622 |  |  | 5 |  |  | 474 |  |  | 1,684 |  |  | 2,163 |
Share of loss of equity-accounted investments | (3 | ) |  | (149 | ) |  | (129 | ) |  | (281 | ) |  | (6 | ) |  | (197 | ) |  | (82 | ) |  | (285 | )
Deduction for dividends | (1 | ) |  | (939 | ) |  | (1,060 | ) |  | (2,000 | ) |  | (3 | ) |  | (483 | ) |  | (708 | ) |  | (1,194 | )
Changes in the scope of consolidation | 3 |  |  | 13 |  |  | (227 | ) |  | (211 | ) |  | 5 |  |  | (710 | ) |  | (1,122 | ) |  | (1,827 | )
Currency translation differences | (2 | ) |  | (244 | ) |  | (166 | ) |  | (412 | ) |  | 2 |  |  | (231 | ) |  | 230 |  |  | 1 |
Other changes | (1 | ) |  | 662 |  |  | (54 | ) |  | 607 |  |  | (16 | ) |  | 5,256 |  |  | 980 |  |  | 6,220 |
Carrying amount - end of the year | 53 |  |  | 8,250 |  |  | 4,327 |  |  | 12,630 |  |  | 50 |  |  | 7,065 |  |  | 4,977 |  |  | 12,092 |
Schedule of net carrying amount of equity-accounted investments |
| December 31, 2023 |  |  | December 31, 2022 |
(€ million) | Net carrying amount |  |  | % of the investment |  |  | Net carrying amount |  |  | % of the investment |
Investments in unconsolidated entities controlled by Eni |  |  |  |  |  |  |  |  |  |  |
Other | 53 |  |  |  |  |  | 50 |  |  |  |
| 53 |  |  |  |  |  | 50 |  |  |  |
Joint ventures |  |  |  |  |  |  |  |  |  |  |
Azule Energy Holdings Ltd | 4,750 |  |  | 50.00 |  |  | 5,073 |  |  | 50.00 |
St. Bernard Renewables Llc | 829 |  |  | 50.00 |  |  |  |  |  |  |
Saipem SpA | 722 |  |  | 31.20 |  |  | 645 |  |  | 31.20 |
SeaCorridor Srl | 530 |  |  | 50.10 |  |  |  |  |  |  |
Cardón IV SA | 443 |  |  | 50.00 |  |  | 433 |  |  | 50.00 |
Mozambique Rovuma Venture SpA | 343 |  |  | 35.71 |  |  | 308 |  |  | 35.71 |
Vårgrønn AS | 336 |  |  | 65.00 |  |  | 370 |  |  | 65.00 |
GreenIT SpA | 92 |  |  | 51.00 |  |  | 74 |  |  | 51.00 |
Lotte Versalis Elastomers Co Ltd | 43 |  |  | 50.00 |  |  | 41 |  |  | 50.00 |
Hergo Renewables SpA | 32 |  |  | 65.00 |  |  | 33 |  |  | 65.00 |
LabAnalysis Environmental Scienze Srl | 25 |  |  | 30.00 |  |  |  |  |  |  |
Società Oleodotti Meridionali - SOM SpA | 21 |  |  | 70.00 |  |  | 29 |  |  | 70.00 |
Other | 84 |  |  |  |  |  | 59 |  |  |  |
| 8,250 |  |  |  |  |  | 7,065 |  |  |  |
Associates |  |  |  |  |  |  |  |  |  |  |
Abu Dhabi Oil Refining Company (Takreer) | 2,434 |  |  | 20.00 |  |  | 2,497 |  |  | 20.00 |
Vår Energi ASA | 447 |  |  | 63.04 |  |  | 763 |  |  | 63.08 |
QatarEnergy LNG NFE (5) | 439 |  |  | 25.00 |  |  | 302 |  |  | 25.00 |
Coral FLNG SA | 239 |  |  | 25.00 |  |  | 330 |  |  | 25.00 |
ADNOC Global Trading Ltd | 145 |  |  | 20.00 |  |  | 158 |  |  | 20.00 |
United Gas Derivatives Co | 81 |  |  | 33.33 |  |  | 72 |  |  | 33.33 |
Novis Renewables Holdings Llc | 70 |  |  | 49.00 |  |  | 74 |  |  | 49.00 |
Bluebell Solar Class A Holdings II Llc | 70 |  |  | 99.00 |  |  | 73 |  |  | 99.00 |
Novamont SpA |  |  |  |  |  |  | 255 |  |  | 35.00 |
Altre | 402 |  |  |  |  |  | 453 |  |  |  |
| 4,327 |  |  |  |  |  | 4,977 |  |  |  |
| 12,630 |  |  |  |  |  | 12,092 |  |  |  |
Schedule of market value of investments listed in regulated stock markets |
| Saipem SpA |  |  | Vår Energi ASA |
Number of shares held | 662,476,192 |  |  | 1,573,713,749 |
% of the investment | 31.20 |  |  | 63.04 |
Share price (€) | 1.47000 |  |  | 2.86287 |
Market value (€ million) | 915 |  |  | 4,505 |
Book value (€ million) | 722 |  |  | 447 |
Schedule of additional information about other investments |
(€ million) | 2023 |  |  | 2022 |
Carrying amount - beginning of the year | 1,202 |  |  | 1,294 |
Additions and subscriptions | 102 |  |  | 68 |
Change in the fair value with effect to OCI | 45 |  |  | 56 |
Currency translation differences | (28 | ) |  | 42 |
Other changes | (65 | ) |  | (258 | )
Carrying amount - end of the year | 1,256 |  |  | 1,202 |

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