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v3.19.1

IFRSs not yet adopted (Details) € in Billions | 12 Months Ended
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Dec. 31, 2018 EUR (€)
Disclosure Of Ifrs Not Yet Adopted [Line Items] |
Future minimum lease payments under non-cancellable operating leases | € 4.0
- Recognition of the shares of leases related to followers | 2.0
- Effect of discounting | (1.5)
Extension options | 1.2
- Other changes | 0.1
Lease liability | € 5.8

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- Definition Disclosure Of Ifrs Not Yet Adopted Line Items + References No definition available. + Details
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Namespace Prefix: | e_
Data Type: | xbrli:stringItemType
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- Definition It represents of options extension. + References No definition available. + Details
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Namespace Prefix: | e_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition The Future minimum lease payments under non-cancellable operating leases + References No definition available. + Details
Name: | e_FutureMinimumLeasePaymentsUnderNonCancellableOperatingLeases
Namespace Prefix: | e_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The lease liability reconciliation of discount effect + References No definition available. + Details
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Namespace Prefix: | e_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The lease liability reconciliation other changes + References No definition available. + Details
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Namespace Prefix: | e_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The lease liability recognition of the portions of leases related to the followers + References No definition available. + Details
Name: | e_LeaseLiabilityReconciliationPortionOfLeasesRelatedToFollowers
Namespace Prefix: | e_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2019-01-01 -Name IFRS -Number 16 -IssueDate 2018-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=16&date=2018-03-01&anchor=para_47_b&doctype=Standard -URIDate 2018-03-16 + Details
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