XML 314 R203.htm IDEA: XBRL DOCUMENT v3.21.1

Other information about investments - Subsidiaries - Global Gas & LNG Portfolio (Details)	12 Months Ended
	Dec. 31, 2020 TND (د.ت)	Dec. 31, 2020 EUR (€)	Dec. 31, 2019 EUR (€)
Subsidiaries
Share capital		€ 4,005,000,000	€ 4,005,000,000
ENI SpA
Subsidiaries
Share capital		4,005,358,876	€ 4,005,358,876
Global Gas & LNG Portfolio | Italy | Subsidiaries One [Member]
Subsidiaries
Company name	Eni Gas Transport Services Srl
Registered office	San Donato Milanese (MI)
Country of operation	Italy
Share capital		120,000
Consolidation or valuation method	Co.
Global Gas & LNG Portfolio | Italy | Subsidiaries One [Member] | ENI SpA
Subsidiaries
% Ownership	100.00%
Global Gas & LNG Portfolio | Italy | Subsidiaries Two [Member]
Subsidiaries
Company name	Eni Global Energy Markets SpA (former Eni Energy Activities Srl)
Registered office	Rome
Country of operation	Italy
Share capital		1,050,000
% Equity ratio	100.00%
Consolidation or valuation method	F.C.
Global Gas & LNG Portfolio | Italy | Subsidiaries Two [Member] | ENI SpA
Subsidiaries
% Ownership	100.00%
Global Gas & LNG Portfolio | Italy | Subsidiaries Three [Member]
Subsidiaries
Company name	Eni Trading & Shipping SpA
Registered office	Rome
Country of operation	Italy
Share capital		60,036,650
% Equity ratio	100.00%
Consolidation or valuation method	F.C.
Global Gas & LNG Portfolio | Italy | Subsidiaries Three [Member] | ENI SpA
Subsidiaries
% Ownership	100.00%
Global Gas & LNG Portfolio | Italy | Subsidiaries Four [Member]
Subsidiaries
Company name	LNG Shipping SpA
Registered office	San Donato Milanese (MI)
Country of operation	Italy
Share capital		240,900,000
% Equity ratio	100.00%
Consolidation or valuation method	F.C.
Global Gas & LNG Portfolio | Italy | Subsidiaries Four [Member] | ENI SpA
Subsidiaries
% Ownership	100.00%
Global Gas & LNG Portfolio | Italy | Subsidiaries Five [Member]
Subsidiaries
Company name	Trans Tunisian Pipeline Co SpA
Registered office	San Donato Milanese (MI)
Country of operation	Tunisia
Share capital		1,098,000
% Equity ratio	100.00%
Consolidation or valuation method	F.C.
Global Gas & LNG Portfolio | Italy | Subsidiaries Five [Member] | ENI SpA
Subsidiaries
% Ownership	100.00%
Global Gas & LNG Portfolio | Foreign (outside Italy) | Subsidiaries Six [Member]
Subsidiaries
Company name	Eni G&P Trading BV
Registered office	Amsterdam (Netherlands)
Country of operation	Turkey
Share capital		70,000
% Equity ratio	100.00%
Consolidation or valuation method	F.C.
Global Gas & LNG Portfolio | Foreign (outside Italy) | Subsidiaries Six [Member] | Eni International BV
Subsidiaries
% Ownership	100.00%
Global Gas & LNG Portfolio | Foreign (outside Italy) | Subsidiaries Seven [Member]
Subsidiaries
Company name	Eni Gas Liquefaction BV
Registered office	Amsterdam (Netherlands)
Country of operation	Netherlands
Share capital		€ 20,000
% Equity ratio	100.00%
Consolidation or valuation method	F.C.
Global Gas & LNG Portfolio | Foreign (outside Italy) | Subsidiaries Seven [Member] | Eni International BV
Subsidiaries
% Ownership	100.00%
Global Gas & LNG Portfolio | Foreign (outside Italy) | Subsidiaries Eight [Member]
Subsidiaries
Company name	Société de Service du Gazoduc Transtunisien SA - Sergaz SA
Registered office	Tunisi (Tunisia)
Country of operation	Tunisia
Share capital | د.ت	د.ت 99,000
% Equity ratio	66.67%
Consolidation or valuation method	F.C.
Global Gas & LNG Portfolio | Foreign (outside Italy) | Subsidiaries Eight [Member] | Third parties
Subsidiaries
% Ownership	33.33%
Global Gas & LNG Portfolio | Foreign (outside Italy) | Subsidiaries Eight [Member] | Eni International BV
Subsidiaries
% Ownership	66.67%
Global Gas & LNG Portfolio | Foreign (outside Italy) | Subsidiaries Nine [Member]
Subsidiaries
Company name	Société pour la Construction du Gazoduc Transtunisien SA - Scogat SA
Registered office	Tunisi (Tunisia)
Country of operation	Tunisia
Share capital | د.ت	د.ت 200,000
% Equity ratio	100.00%
Consolidation or valuation method	F.C.
Global Gas & LNG Portfolio | Foreign (outside Italy) | Subsidiaries Nine [Member] | ENI SpA
Subsidiaries
% Ownership	0.05%
Global Gas & LNG Portfolio | Foreign (outside Italy) | Subsidiaries Nine [Member] | Eni International BV
Subsidiaries
% Ownership	99.85%
Global Gas & LNG Portfolio | Foreign (outside Italy) | Subsidiaries Nine [Member] | LNG Shipping SpA
Subsidiaries
% Ownership	0.05%
Global Gas & LNG Portfolio | Foreign (outside Italy) | Subsidiaries Nine [Member] | Trans Tunis P Co SpA
Subsidiaries
% Ownership	0.05%

X

- Definition

Percentage of equity ratio

+ References

No definition available.

+ Details

Name:	e_PercentageOfEquityRatio
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 2020-01-01
-Paragraph 138
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_138_a&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_AddressOfRegisteredOfficeOfEntity
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
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 2020-01-01
-Paragraph 78
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_78_e&doctype=Standard
-URIDate 2020-01-01

+ Details

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

X

- Definition

The description of the method used to account for investments in subsidiaries. [Refer: Subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2020-01-01
-Paragraph 16
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_16_c&doctype=Standard
-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2020-01-01
-Paragraph 17
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_17_c&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_MethodUsedToAccountForInvestmentsInSubsidiaries
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The name of a subsidiary. [Refer: Subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2020-01-01
-Paragraph 17
-Subparagraph b
-Clause i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_17_b_i&doctype=Standard
-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2020-01-01
-Paragraph 16
-Subparagraph b
-Clause i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_16_b_i&doctype=Standard
-URIDate 2020-01-01

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2020-01-01
-Paragraph 12
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_12_a&doctype=Standard
-URIDate 2020-01-01

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2020-01-01
-Paragraph 19B
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_19B_a&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_NameOfSubsidiary
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The principal place of business of a subsidiary. [Refer: Principal place of business; Subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2020-01-01
-Paragraph 16
-Subparagraph b
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_16_b_ii&doctype=Standard
-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2020-01-01
-Paragraph 17
-Subparagraph b
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_17_b_ii&doctype=Standard
-URIDate 2020-01-01

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2020-01-01
-Paragraph 12
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_12_b&doctype=Standard
-URIDate 2020-01-01

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2020-01-01
-Paragraph 19B
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_19B_b&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_PrincipalPlaceOfBusinessOfSubsidiary
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2020-01-01
-Paragraph 17
-Subparagraph b
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_17_b_iii&doctype=Standard
-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2020-01-01
-Paragraph 16
-Subparagraph b
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_16_b_iii&doctype=Standard
-URIDate 2020-01-01

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2020-01-01
-Paragraph 19B
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_19B_c&doctype=Standard
-URIDate 2020-01-01

+ Details

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

X

- Details

Name:	dei_LegalEntityAxis=srt_ParentCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SegmentsAxis=e_GlobalGasAndLngPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_GeographicalAreasAxis=country_IT
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=e_SubsidiariesOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=e_SubsidiariesTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=e_SubsidiariesThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=e_SubsidiariesFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=e_SubsidiariesFiveMember
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:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=e_SubsidiariesSixMember
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:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=e_SubsidiariesSevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=e_SubsidiariesEightMember
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:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=e_SubsidiariesNineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=e_LNGShippingSpAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=e_TransTunisPCoSpAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: