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v3.23.1

Equity - Additional information (Details) - EUR (€) |  |  |  |  |  | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 22, 2023 | Oct. 27, 2022 | Jul. 28, 2022 | May 13, 2022 | May 11, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | May 11, 2050 | Oct. 13, 2049 | May 11, 2047 | Jan. 13, 2046 | May 11, 2035 | Oct. 13, 2034 | May 11, 2032 | Jan. 13, 2031 | May 11, 2030 | Oct. 13, 2029 | May 11, 2027 | Jan. 13, 2026
Share capital |  |  |  |  |  | € 4,005,000,000 | € 4,005,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend per share to fully settle prior year dividend |  |  |  |  | € 0.43 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends recognised as distributions to owners per share |  |  |  |  |  |  | € 0.43 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of treasury shares cancelled |  |  |  |  | 34,106,871 | 34,106,871 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reduction of the related reserve due to cancellation of treasury shares |  |  |  |  | € 400,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends paid, ordinary shares per share | € 0.22 | € 0.22 | € 0.22 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ordinary shares authorized to be purchased |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of shares, maximum authorised amount |  |  |  |  | € 2,500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of treasury shares purchased |  |  |  |  |  | 195,550,084 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of treasury shares |  |  |  |  |  | € 2,400,000,000 | € 400,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Interim dividend distribution of Eni SpA |  |  |  |  |  | 1,500,000,000 | € 1,533,000,000 | € 429,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Interim dividends paid per share |  |  |  |  |  |  | € 0.86 |  |  |  |  |  |  |  |  |  |  |  |  |
Costs for the issue of perpetual subordinated bonds |  |  |  |  |  |  | € 15,000,000 | € 25,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Other reserves |  |  |  |  |  | € 190,000,000 | 190,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of treasury shares |  |  |  |  |  | 195,550,084 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury shares |  |  |  |  |  | € 2,937,000,000 | 958,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Cancellation of treasury shares |  |  |  |  |  | € 400,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury shares assigned |  |  |  |  |  | 1,183,552 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distributable reserves |  |  |  |  |  | € 45,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Term Monetary Incentive Plan 2020 - 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury shares assigned |  |  |  | 20,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retained earnings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interim dividend distribution of Eni SpA |  |  |  |  |  | € 1,500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interim dividends paid per share |  |  |  |  |  | € 0.44 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Perpetual subordinated bonds |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  | € 5,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Perpetual subordinated bond, one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  | € 1,500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term of the bonds |  |  |  |  |  | 5 years 3 months |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reoffer price (as a percent) |  |  |  |  |  | 99.403% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual fixed coupon (as a percent) |  |  |  |  |  | 2.625% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Perpetual subordinated bond, one | Five Year Euro Mid Swap Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial spread on variable rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 316.70%
Additional spread on variable rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 75.00% |  |  |  | 25.00% |  |  |  |
Perpetual subordinated bond, two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  | € 1,500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term of the bonds |  |  |  |  |  | 9 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reoffer price (as a percent) |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual fixed coupon (as a percent) |  |  |  |  |  | 3.375% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Perpetual subordinated bond, two | Five Year Euro Mid Swap Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial spread on variable rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 364.10% |  |
Additional spread on variable rate (as a percent) |  |  |  |  |  |  |  |  |  | 75.00% |  |  |  | 25.00% |  |  |  |  |  |
Perpetual subordinated bond three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  | € 1,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term of the bonds |  |  |  |  |  | 6 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reoffer price (as a percent) |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual fixed coupon (as a percent) |  |  |  |  |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Perpetual subordinated bond three | Five Year Euro Mid Swap Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial spread on variable rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 220.40% |
Additional spread on variable rate (as a percent) |  |  |  |  |  |  |  |  |  |  | 75.00% |  |  |  | 25.00% |  |  |  |  |
Perpetual subordinated bond four |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  | € 1,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term of the bonds |  |  |  |  |  | 9 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reoffer price (as a percent) |  |  |  |  |  | 99.607% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual fixed coupon (as a percent) |  |  |  |  |  | 2.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Perpetual subordinated bond four | Five Year Euro Mid Swap Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial spread on variable rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 277.10% |  |  |
Additional spread on variable rate (as a percent) |  |  |  |  |  |  |  |  | 75.00% |  |  |  | 25.00% |  |  |  |  |  |  |
Merger reserve |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other reserves |  |  |  |  |  | € 190,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
ENI SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  |  |  |  | € 4,005,358,876 | € 4,005,358,876 |  |  |  |  |  |  |  |  |  |  |  |  |
ENI SpA | Ordinary shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued |  |  |  |  |  | 3,571,487,977 | 3,605,594,848 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of treasury shares |  |  |  |  |  | 226,097,834 | 65,838,173 |  |  |  |  |  |  |  |  |  |  |  |  |

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