XML 151 R144.htm IDEA: XBRL DOCUMENT v3.8.0.1

Investments (Details 1) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
DisclosureOfInvestmentsLineItems [Line Items]
Share Of Profit Of Equity Accounted Investments	€ 124	€ 77
Deduction For Dividends	(86)	(100)
Eni BTC Ltd [Member]
DisclosureOfInvestmentsLineItems [Line Items]
Share Of Profit Of Equity Accounted Investments		€ 6
Deduction For Dividends	€ 27
% of the investment in unconsolidated entities	100.00%	100.00%
Angola LNG Ltd [Member]
DisclosureOfInvestmentsLineItems [Line Items]
Share Of Profit Of Equity Accounted Investments	€ 45
% of the investment in associates	13.60%	13.60%
PetroJunin SA [Member]
DisclosureOfInvestmentsLineItems [Line Items]
Share Of Profit Of Equity Accounted Investments	€ 26	€ 30
% of the investment in joint ventures	40.00%	40.00%
United Gas Derivatives Co [Member]
DisclosureOfInvestmentsLineItems [Line Items]
Share Of Profit Of Equity Accounted Investments	€ 16	€ 14
Deduction For Dividends	€ 12	€ 14
% of the investment in associates	33.33%	33.33%
Gas Distribution Company of Thessaloniki [Member]
DisclosureOfInvestmentsLineItems [Line Items]
Share Of Profit Of Equity Accounted Investments	€ 9	€ 10
Deduction For Dividends	€ 12	€ 10
% of the investment in joint ventures	49.00%	49.00%
PetroSucre SA [Member]
DisclosureOfInvestmentsLineItems [Line Items]
Deduction For Dividends		€ 30
% of the investment in associates		26.00%
Unimar Llc [Member]
DisclosureOfInvestmentsLineItems [Line Items]
Share Of Profit Of Equity Accounted Investments	€ 3
Deduction For Dividends	€ 24	€ 16
% of the investment in joint ventures	50.00%	50.00%
Other Related Parties [Member]
DisclosureOfInvestmentsLineItems [Line Items]
Share Of Profit Of Equity Accounted Investments	€ 25	€ 17
Deduction For Dividends	€ 11	€ 30

X

- Definition

It represents the deduction for dividends.

+ References

No definition available.

+ Details

Name:	E_DeductionForDividends
Namespace Prefix:	E_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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

X

- Definition

The proportion of ownership interest in an unconsolidated entities attributable to the entity.

+ References

No definition available.

+ Details

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

X

- Definition

It represents the share of profit of equity accounted investments.

+ References

No definition available.

+ Details

Name:	E_ShareOfProfitOfEquityAccountedInvestments
Namespace Prefix:	E_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The proportion of ownership interest in an associate attributable to the entity. [Refer: Associates [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2017-01-01
-Paragraph 17
-Subparagraph b
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2017-03-01&anchor=para_17_b_iii&doctype=Standard
-URIDate 2017-03-09

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2017-01-01
-Paragraph 16
-Subparagraph b
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2017-03-01&anchor=para_16_b_iii&doctype=Standard
-URIDate 2017-03-09

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2017-01-01
-Paragraph 21
-Subparagraph a
-Clause iv
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_21_a_iv&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_ProportionOfOwnershipInterestInAssociate
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The proportion of ownership interest in a joint venture attributable to the entity. [Refer: Joint ventures [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2017-01-01
-Paragraph 17
-Subparagraph b
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2017-03-01&anchor=para_17_b_iii&doctype=Standard
-URIDate 2017-03-09

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2017-01-01
-Paragraph 16
-Subparagraph b
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2017-03-01&anchor=para_16_b_iii&doctype=Standard
-URIDate 2017-03-09

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2017-01-01
-Paragraph 21
-Subparagraph a
-Clause iv
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_21_a_iv&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_ProportionOfOwnershipInterestInJointVenture
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_UnconsolidatedStructuredEntitiesAxis=E_EniBTCLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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