XML 240 R217.htm IDEA: XBRL DOCUMENT
v3.20.1

Other information about investments - Other significant investments - Gas & Power (Details) - EUR (€) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Other significant investments |  |
Share capital | € 4,005,000,000 | € 4,005,000,000
Gas & Power | Foreign (outside Italy) | Other significant investments One [member] |  |
Other significant investments |  |
Company name | Norsea Gas GmbH |
Registered office | Emden (Germany) |
Country of operation | Germany |
Share capital | € 1,533,875.64 |
Consolidation or valuation method | F.V. |
Gas & Power | Foreign (outside Italy) | Other significant investments One [member] | Eni International BV |  |
Other significant investments |  |
% Ownership | 13.04% |
Gas & Power | Foreign (outside Italy) | Other significant investments One [member] | Third parties |  |
Other significant investments |  |
% Ownership | 86.96% |

X
- Definition Disclosure of detailed information about other investments + References No definition available. + Details
Name: | e_DisclosureOfDetailedInformationAboutOtherInvestmentsLineItems
Namespace Prefix: | e_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Method used to account for other investments + References No definition available. + Details
Name: | e_MethodUsedToAccountForOtherInvestments
Namespace Prefix: | e_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Name of other investment + References No definition available. + Details
Name: | e_NameOfOtherInvestment
Namespace Prefix: | e_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Principal place of the business of other investments + References No definition available. + Details
Name: | e_PrincipalPlaceOfBusinessOfOtherInvestments
Namespace Prefix: | e_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Proportion of ownership interest in other investments + References No definition available. + Details
Name: | e_ProportionOfOwnershipInterestInOtherInvestments
Namespace Prefix: | e_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The address at which the entity's office is registered. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 138 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_138_a&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_AddressOfRegisteredOfficeOfEntity
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The nominal value of capital issued. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 78 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_78_e&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_IssuedCapital
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_SegmentsAxis=e_GasAndPowerSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=ifrs-full_ForeignCountriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | e_OtherSignificantInvestmentsAxis=e_OtherSignificantInvestmentsOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=e_EniInternationalBVMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=e_ThirdPartiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |