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Finance debt - Ordinary bonds (Details) - EUR (€) € in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 01, 2021
Borrowings |  |  |
Borrowings | € 26,917 | € 27,794 | € 27,794
Ordinary Bonds |  |  |
Borrowings |  |  |
Nominal value | 18,376 |  |
Discount on bond issue and accrued expenses | 136 |  |
Borrowings | 18,512 | € 18,962 |
Euro Medium Term Notes |  |  |
Borrowings |  |  |
Nominal value | 15,800 |  |
Euro Medium Term Notes, Ordinary Bonds |  |  |
Borrowings |  |  |
Nominal value | 14,834 |  |
Discount on bond issue and accrued expenses | 119 |  |
Borrowings | 14,953 |  |
Other Bonds |  |  |
Borrowings |  |  |
Nominal value | 3,542 |  |
Discount on bond issue and accrued expenses | 17 |  |
Borrowings | 3,559 |  |
ENI SpA | Euro Medium Term Notes |  |  |
Borrowings |  |  |
Nominal value | 13,400 |  |
ENI SpA | Euro Medium Term Notes One |  |  |
Borrowings |  |  |
Nominal value | 1,200 |  |
Discount on bond issue and accrued expenses | 15 |  |
Borrowings | € 1,215 |  |
Borrowings, original currency | EUR |  |
ENI SpA | Euro Medium Term Notes One | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2025 |  |
Borrowings, interest rate | 3.75% |  |
ENI SpA | Euro Medium Term Notes Two |  |  |
Borrowings |  |  |
Nominal value | € 1,000 |  |
Discount on bond issue and accrued expenses | 29 |  |
Borrowings | € 1,029 |  |
Borrowings, original currency | EUR |  |
ENI SpA | Euro Medium Term Notes Two | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2029 |  |
Borrowings, interest rate | 3.625% |  |
ENI SpA | Euro Medium Term Notes Three |  |  |
Borrowings |  |  |
Nominal value | € 1,000 |  |
Discount on bond issue and accrued expenses | 15 |  |
Borrowings | € 1,015 |  |
Borrowings, original currency | EUR |  |
ENI SpA | Euro Medium Term Notes Three | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2023 |  |
Borrowings, interest rate | 3.25% |  |
ENI SpA | Euro Medium Term Notes Four |  |  |
Borrowings |  |  |
Nominal value | € 1,000 |  |
Discount on bond issue and accrued expenses | 11 |  |
Borrowings | € 1,011 |  |
Borrowings, original currency | EUR |  |
ENI SpA | Euro Medium Term Notes Four | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2026 |  |
Borrowings, interest rate | 1.50% |  |
ENI SpA | Euro Medium Term Notes Five |  |  |
Borrowings |  |  |
Nominal value | € 1,000 |  |
Discount on bond issue and accrued expenses | 10 |  |
Borrowings | € 1,010 |  |
Borrowings, original currency | EUR |  |
ENI SpA | Euro Medium Term Notes Five | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2031 |  |
Borrowings, interest rate | 2.00% |  |
ENI SpA | Euro Medium Term Notes Six |  |  |
Borrowings |  |  |
Nominal value | € 1,000 |  |
Discount on bond issue and accrued expenses | 3 |  |
Borrowings | € 1,003 |  |
Borrowings, original currency | EUR |  |
ENI SpA | Euro Medium Term Notes Six | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2026 |  |
Borrowings, interest rate | 1.25% |  |
ENI SpA | Euro Medium Term Notes Seven |  |  |
Borrowings |  |  |
Nominal value | € 1,000 |  |
Discount on bond issue and accrued expenses | 3 |  |
Borrowings | € 1,003 |  |
Borrowings, original currency | EUR |  |
ENI SpA | Euro Medium Term Notes Seven | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2030 |  |
Borrowings, interest rate | 0.625% |  |
ENI SpA | Euro Medium Term Notes Eight |  |  |
Borrowings |  |  |
Nominal value | € 900 |  |
Borrowings | € 900 |  |
Borrowings, original currency | EUR |  |
ENI SpA | Euro Medium Term Notes Eight | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2024 |  |
Borrowings, interest rate | 0.625% |  |
ENI SpA | Euro Medium Term Notes Nine |  |  |
Borrowings |  |  |
Nominal value | € 800 |  |
Discount on bond issue and accrued expenses | 2 |  |
Borrowings | € 802 |  |
Borrowings, original currency | EUR |  |
ENI SpA | Euro Medium Term Notes Nine | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2028 |  |
Borrowings, interest rate | 1.625% |  |
ENI SpA | Euro Medium Term Notes Ten |  |  |
Borrowings |  |  |
Nominal value | € 750 |  |
Discount on bond issue and accrued expenses | 11 |  |
Borrowings | € 761 |  |
Borrowings, original currency | EUR |  |
ENI SpA | Euro Medium Term Notes Ten | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2024 |  |
Borrowings, interest rate | 1.75% |  |
ENI SpA | Euro Medium Term Notes Eleven |  |  |
Borrowings |  |  |
Nominal value | € 750 |  |
Discount on bond issue and accrued expenses | 8 |  |
Borrowings | € 758 |  |
Borrowings, original currency | EUR |  |
ENI SpA | Euro Medium Term Notes Eleven | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2027 |  |
Borrowings, interest rate | 1.50% |  |
ENI SpA | Euro Medium Term Notes Twelve |  |  |
Borrowings |  |  |
Nominal value | € 750 |  |
Discount on bond issue and accrued expenses | (3) |  |
Borrowings | € 747 |  |
Borrowings, original currency | EUR |  |
ENI SpA | Euro Medium Term Notes Twelve | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2034 |  |
Borrowings, interest rate | 1.00% |  |
ENI SpA | Euro Medium Term Notes Thirteen |  |  |
Borrowings |  |  |
Nominal value | € 650 |  |
Discount on bond issue and accrued expenses | 4 |  |
Borrowings | € 654 |  |
Borrowings, original currency | EUR |  |
ENI SpA | Euro Medium Term Notes Thirteen | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2025 |  |
Borrowings, interest rate | 1.00% |  |
ENI SpA | Euro Medium Term Notes Fourteen |  |  |
Borrowings |  |  |
Nominal value | € 600 |  |
Discount on bond issue and accrued expenses | (2) |  |
Borrowings | € 598 |  |
Borrowings, original currency | EUR |  |
ENI SpA | Euro Medium Term Notes Fourteen | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2028 |  |
Borrowings, interest rate | 1.125% |  |
ENI SpA | Other bonds One |  |  |
Borrowings |  |  |
Nominal value | € 937 |  |
Discount on bond issue and accrued expenses | 10 |  |
Borrowings | € 947 |  |
Borrowings, original currency | USD |  |
ENI SpA | Other bonds One | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2023 |  |
Borrowings, interest rate | 4.00% |  |
ENI SpA | Other bonds Two |  |  |
Borrowings |  |  |
Nominal value | € 937 |  |
Discount on bond issue and accrued expenses | 5 |  |
Borrowings | € 942 |  |
Borrowings, original currency | USD |  |
ENI SpA | Other bonds Two | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2028 |  |
Borrowings, interest rate | 4.75% |  |
ENI SpA | Other bonds Three |  |  |
Borrowings |  |  |
Nominal value | € 937 |  |
Discount on bond issue and accrued expenses | 1 |  |
Borrowings | € 938 |  |
Borrowings, original currency | USD |  |
ENI SpA | Other bonds Three | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2029 |  |
Borrowings, interest rate | 4.25% |  |
ENI SpA | Other bonds Four |  |  |
Borrowings |  |  |
Nominal value | € 328 |  |
Discount on bond issue and accrued expenses | 1 |  |
Borrowings | € 329 |  |
Borrowings, original currency | USD |  |
ENI SpA | Other bonds Four | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2040 |  |
Borrowings, interest rate | 5.70% |  |
Eni Finance International SA | Euro Medium Term Notes Fifteen |  |  |
Borrowings |  |  |
Nominal value | € 1,639 |  |
Discount on bond issue and accrued expenses | 6 |  |
Borrowings | € 1,645 |  |
Borrowings, original currency | USD |  |
Eni Finance International SA | Euro Medium Term Notes Fifteen | Minimum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2026 |  |
Eni Finance International SA | Euro Medium Term Notes Fifteen | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2027 |  |
Eni Finance International SA | Euro Medium Term Notes Sixteen |  |  |
Borrowings |  |  |
Nominal value | € 795 |  |
Discount on bond issue and accrued expenses | 7 |  |
Borrowings | € 802 |  |
Borrowings, original currency | EUR |  |
Eni Finance International SA | Euro Medium Term Notes Sixteen | Minimum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2025 |  |
Borrowings, interest rate | 1.275% |  |
Eni Finance International SA | Euro Medium Term Notes Sixteen | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2043 |  |
Borrowings, interest rate | 5.441% |  |
Eni Finance International SA | Euro Medium Term Notes Seventeen |  |  |
Borrowings |  |  |
Borrowings, interest rate description | variable |  |
Eni USA Inc | Other bonds Five |  |  |
Borrowings |  |  |
Nominal value | € 375 |  |
Borrowings | € 375 |  |
Borrowings, original currency | USD |  |
Eni USA Inc | Other bonds Five | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2027 |  |
Borrowings, interest rate | 7.30% |  |
PLT Wind 2022 SpA | Other bonds Six |  |  |
Borrowings |  |  |
Nominal value | € 18 |  |
Borrowings | € 18 |  |
Borrowings, original currency | EUR |  |
Borrowings, interest rate description | variable |  |
PLT Wind 2022 SpA | Other bonds Six | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2031 |  |
SEF Srl | Other bonds, Seven [member] |  |  |
Borrowings |  |  |
Nominal value | € 10 |  |
Borrowings | € 10 |  |
Borrowings, original currency | EUR |  |
SEF Srl | Other bonds, Seven [member] | Maximum |  |  |
Borrowings |  |  |
Borrowings, maturity | 2026 |  |
Borrowings, interest rate | 7.00% |  |

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