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Revenues and other income - Other income and revenues (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues and other income
Gains from sale of assets and businesses	€ 27	€ 48	€ 107
Other proceeds	1,072	1,127	1,089
Other income and revenues	€ 1,099	€ 1,175	€ 1,196

X

- Definition

The amount of gain on sale of assets and businesses.

+ References

No definition available.

+ Details

Name:	e_GainOnSaleOfAssetsAndBusinesses
Namespace Prefix:	e_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of other income and revenues.

+ References

No definition available.

+ Details

Name:	e_OtherIncomeAndRevenues
Namespace Prefix:	e_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of other income and revenue from other proceeds.

+ References

No definition available.

+ Details

Name:	e_OtherRevenueFromOtherProceeds
Namespace Prefix:	e_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	ifrs-full_RevenueAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration