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Reversals (Impairments) of tangible and intangible assets and right-of-use assets. Sensitivity of outcomes to alternative scenarios (Details) € in Billions	12 Months Ended
	Dec. 31, 2023 EUR (€) $ / bbl $ / MMBTU $ / t
Eni's scenario
Impairment
Value in use of the O&G CGUs Headroom vs Carrying amount, tax-deductible CO2 charges	77.00%
Brent price per bbl | $ / bbl	48
Long-term gas price | $ / MMBTU	6.2
IEA SDS WEO 2021 scenario
Impairment
Value in use of the O&G CGUs Headroom vs Carrying amount, tax-deductible CO2 charges	56.00%
Possible impairments	€ (1.0)
IEA NZE 2050 scenario
Impairment
Value in use of the O&G CGUs Headroom vs Carrying amount, tax-deductible CO2 charges	28.00%
Value in use of the O&G CGUs Headroom vs Carrying amount, non-tax deductible CO2 charges	23.00%
Brent price per bbl | $ / bbl	25
Long-term gas price | $ / MMBTU	4.1
Eni's scenario with +1% increase in WAAC
Impairment
Value in use of the O&G CGUs Headroom vs Carrying amount, tax-deductible CO2 charges	67.00%
Possible impairments	€ (0.2)
Minimum | IEA NZE 2050 scenario
Impairment
Possible impairments	€ (3.2)
Cost CO2 | $ / t	250
Maximum | IEA NZE 2050 scenario
Impairment
Possible impairments	€ (4.3)
Cost CO2 | $ / t	180

X

- Definition

Brent price per barrel of oil during the period.

+ References

No definition available.

+ Details

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X

- Definition

The element represents cost of CO2.

+ References

No definition available.

+ Details

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X

- Definition

The element represent about long term assumption for benchmark gas price.

+ References

No definition available.

+ Details

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X

- Definition

Represents the value in use of CGU percentage with taxation and Co2 charges.

+ References

No definition available.

+ Details

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X

- Definition

Represents the value in use of CGU percentage without taxation and Co2 charges.

+ References

No definition available.

+ Details

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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- Definition

Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of change in sales and transfer prices and in production (lifting) costs related to future production.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Form 20-F
-Section Item 18
-Subsection Instruction 2
-Publisher SEC

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- Details

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- Details

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- Details

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