XML 112 R105.htm IDEA: XBRL DOCUMENT v3.8.0.1

Financial assets held for trading (Details Textual) - EUR (€) € in Millions		Dec. 31, 2017	Dec. 31, 2016
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items]
Current financial assets at fair value through profit or loss, classified as held for trading	[1]	€ 6,012	€ 6,166
Quoted bonds issued by sovereign states [Member]
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items]
Current financial assets at fair value through profit or loss, classified as held for trading		1,022	996
Quoted bonds issued by sovereign states [Member] | Securities held for non-operating purposes [Member]
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items]
Financial assets at fair value		190
Level 1 Of Fair Value Hierarchy [Member]
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items]
Financial assets at fair value		5,140
Level 2 of fair value hierarchy [member]
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items]
Financial assets at fair value		872
Securities lending [member]
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items]
Current financial assets at fair value through profit or loss, classified as held for trading		845	665
Eni Insurance DAC [Member]
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items]
Current financial assets at fair value through profit or loss, classified as held for trading		219	104
Eni SpA [Member]
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items]
Current financial assets at fair value through profit or loss, classified as held for trading		€ 5,793	€ 6,062
[1] Income or expense were recognized in the profit and loss account within “Finance income (expense)”.

X

- References

No definition available.

+ Details

Name:	E_DisclosureOfFinancialAssetsHeldForTradingLineItems
Namespace Prefix:	E_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of current financial assets measured at fair value through profit or loss classified as held for trading. [Refer: Financial assets at fair value through profit or loss, classified as held for trading]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2018-01-01
-Name IFRS
-Number 7
-IssueDate 2017-01-01
-Paragraph 8
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_8_a&doctype=Standard&book=B
-URIDate 2017-03-09

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_55&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_CurrentFinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The fair value of financial assets. [Refer: At fair value [member]; Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2017-01-01
-Paragraph 25
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_25&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_FinancialAssetsAtFairValue
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=E_QuotedbondsissuedbysovereignstatesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_CategoriesOfFinancialAssetsAxis=E_FinancialAssetsHeldForNonoperatingPurposeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level1OfFairValueHierarchyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level2OfFairValueHierarchyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfTransferAxis=ifrs-full_SecuritiesLendingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=E_EniInsuranceDACMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	E_ParentNameAxis=E_EniSpAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: