XML 214 R207.htm IDEA: XBRL DOCUMENT v3.8.0.1

Other information (Details Textual) € in Millions	12 Months Ended
	Dec. 31, 2017 EUR (€)
Eni Gas & Power NV [Member]
DisclosureOfNotesAndOtherExplanatoryInformationExplanatoryLineItems [Line Items]
Cash Consideration	€ 8
Consideration paid (received)	€ 302
Natural gas [Member] | ExxonMobil [Member]
DisclosureOfNotesAndOtherExplanatoryInformationExplanatoryLineItems [Line Items]
Percentage of interest in product sold	25.00%
Cash Consideration	€ 2,362
Repayments of borrowings, classified as financing activities	€ 264

X

- References

No definition available.

+ Details

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

X

- Definition

The percentage of interest in natural gas product sold.

+ References

No definition available.

+ Details

Name:	E_Percentageofinterestinproductsold
Namespace Prefix:	E_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The fair value, at acquisition date, of cash transferred as consideration in a business combination. [Refer: Business combinations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2017-01-01
-Paragraph B64
-Subparagraph f
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B64_f_i&doctype=Appendix&seq=2
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_CashTransferred
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of consideration paid or received in respect of both obtaining and losing control of subsidiaries or other businesses. [Refer: Subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 7
-IssueDate 2017-01-01
-Paragraph 40
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=para_40_a&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_ConsiderationPaidReceived
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The cash outflow to settle borrowings, classified as financing activities. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 7
-IssueDate 2017-01-01
-Paragraph 17
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=para_17_d&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	ifrs-full_BusinessCombinationsAxis=E_EnigaspowernvMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ProductsAndServicesAxis=E_NaturalgasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_CounterpartiesAxis=E_ExxonmobilMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: