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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