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Revenues and other income - Other income and revenues (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Revenues and other income |  |  |
Gains from sale of assets and businesses | € 107 | € 10 | € 152
Other proceeds | 1,089 | 950 | 1,008
Other income and revenues | € 1,196 | € 960 | € 1,160

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- References No definition available. + Details
Name: | e_DisclosureOfRevenueExplanatoryAbstract
Namespace Prefix: | e_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- 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

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- Definition 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