XML 142 R135.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Intangible assets (Details 2) | 12 Months Ended
--- | ---
Dec. 31, 2017
Intangible Exploration And Evaluation Assets [Member] |
DisclosureOfIntangibleAssetsExplanatoryLineItems [Line Items] |
Useful lives or amortisation rates intangible assets other than goodwill | UOP - 33
Transport rights of natural gas [Member] |
DisclosureOfIntangibleAssetsExplanatoryLineItems [Line Items] |
Useful lives or amortisation rates intangible assets other than goodwill | 3
Other concessions, licenses, trademarks and similar items [Member] |
DisclosureOfIntangibleAssetsExplanatoryLineItems [Line Items] |
Useful lives or amortisation rates intangible assets other than goodwill | 3 - 33
Service concession arrangement [Member] |
DisclosureOfIntangibleAssetsExplanatoryLineItems [Line Items] |
Useful lives or amortisation rates intangible assets other than goodwill | 20 - 33
Other Intangible Assets [Member] |
DisclosureOfIntangibleAssetsExplanatoryLineItems [Line Items] |
Useful lives or amortisation rates intangible assets other than goodwill | 4 - 20

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

X
- Definition The useful lives or amortisation rates used for intangible assets other than goodwill. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2017-01-01 -Paragraph 118 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2017-03-01&anchor=para_118_a&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_UsefulLivesOrAmortisationRatesIntangibleAssetsOtherThanGoodwill
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=ifrs-full_IntangibleExplorationAndEvaluationAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=E_TransportRightsOfNaturalGasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=E_ConcessionsLicensesTrademarksAndSimilarItemMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=E_ServiceConcessionArrangementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=ifrs-full_OtherIntangibleAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |