Trade and other receivables - Additional information (Details 2) - MMBbls	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Trade and other receivables
Expected credit loss rate (as a percent)	12.40%	12.40%
Maximum
Trade and other receivables
Receivables, payment terms	180 days
Defaulted receivables
Trade and other receivables
Expected credit loss rate (as a percent)	42.40%	55.00%
Nigeria \| Defaulted receivables \| Assets held for sale \| NAOC Ltd
Trade and other receivables
Percentage of net receivables accrued for unpaid cash calls (as a percent)	85.00%
PDVSA \| Venezuela
Trade and other receivables
Number of shareholders who purchased the receivables	2
Crude oil volume capacity (in volumes)	5.6

Disclosure of trade and other receivables line items.

No definition available.

Name:	e_DisclosureOfTradeAndOtherReceivablesLineItems
Namespace Prefix:	e_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of shareholders who purchased the receivables from the ventures.

+ References

No definition available.

+ Details

Name:	e_NumberOfShareholdersWhoPurchasedReceivables
Namespace Prefix:	e_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of preventive seizure for corresponding to the alleged litigations.

+ References

No definition available.

+ Details

Name:	e_PercentageOfNetReceivablesAccruedForUnpaidCashCalls
Namespace Prefix:	e_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The period of receivables, payment terms.

+ References

No definition available.

+ Details

Name:	e_ReceivablesPaymentTerms
Namespace Prefix:	e_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The rate of expected credit losses, calculated as percentage of the gross carrying amount. Expected credit losses are the weighted average of credit losses with the respective risks of a default occurring as the weights.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 7
-IssueDate 2023-01-01
-Paragraph 35N
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35N&doctype=Standard
-URIDate 2023-03-23

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 7
-IssueDate 2023-01-01
-Paragraph IG20D
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_IG20D&doctype=Implementation%20Guidance
-URIDate 2023-03-23

+ Details

Name:	ifrs-full_ExpectedCreditLossRate
Namespace Prefix:	ifrs-full_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Quantity of oil and gas subject to delivery commitment.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Regulation S-K (SK)
-Number 229
-Section 1207
-Paragraph (a)
-Subparagraph (2)
-Publisher SEC

+ Details

Name:	srt_OilAndGasDeliveryCommitmentsAndContractsRemainingContractualVolume
Namespace Prefix:	srt_
Data Type:	dtr-types:volumeItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=e_DefaultedReceivablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_GeographicalAreasAxis=country_NG
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis=ifrs-full_NoncurrentAssetsHeldForSaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=e_NAOCLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CounterpartiesAxis=e_PdvsaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_GeographicalAreasAxis=country_VE
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: