XML 247 R176.htm IDEA: XBRL DOCUMENT v3.19.1

Shareholders' equity (Details Textual) € / shares in Units, $ / shares in Units, $ in Millions		1 Months Ended	12 Months Ended
	Apr. 13, 2017 USD ($)	May 12, 2016 $ / shares	Dec. 31, 2018 EUR (€) € / shares shares	Dec. 31, 2018 EUR (€) $ / shares shares	Dec. 31, 2017 EUR (€) € / shares shares	Dec. 31, 2016 € / shares
Share capital			€ 4,005,000,000	€ 4,005,000,000	€ 4,005,000,000
Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share | $ / shares		$ 0.42		€ 0.42
Capital redemption reserve			581,000,000	€ 581,000,000	581,000,000
Other reserves			1,672,000,000	1,672,000,000	1,889,000,000
Treasury shares			(581,000,000)	(581,000,000)	(581,000,000)
Distributable Reserves			46,000,000,000	46,000,000,000
Interim Dividends			€ 1,513,000,000	1,513,000,000	€ 1,441,000,000
Interim Dividends Paid Per Share | € / shares			€ 0.42		€ 0.40	€ 0.40
Dividends recognised as distributions to owners per share | € / shares					€ 0.80
Retained earnings			€ 36,702,000,000	€ 36,702,000,000	€ 35,966,000,000
Sale of treasury shares | $	$ 11
Ordinary shares [member]
Number of shares issued | shares			3,634,185,330	3,634,185,330
Parent companys [Member]
Share capital			€ 4,005,358,876	€ 4,005,358,876
Eni SpA Reserve [Member]
Other reserves			63,000,000	63,000,000
Merger reserve [member]
Other reserves			€ 127,000,000	€ 127,000,000
Treasury shares [member]
Number of shares issued | shares					33,045,197

X

- Definition

Represents the distributed reserves.

+ References

No definition available.

+ Details

Name:	e_DistributableReserves
Namespace Prefix:	e_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Represents the distribution to shareholders that has been both declared and paid before a company has determined its full-year earnings.

+ References

No definition available.

+ Details

Name:	e_InterimDividends
Namespace Prefix:	e_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The amount of interim dividends paid per share.

+ References

No definition available.

+ Details

Name:	e_InterimDividendsPaidPerShare
Namespace Prefix:	e_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Disposal of treasury shares under incentive plan maximum

+ References

No definition available.

+ Details

Name:	e_SaleOfTreasuryShares
Namespace Prefix:	e_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

A component of equity representing the reserve for the redemption of the entity's own shares.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard
-URIDate 2018-03-16

+ Details

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

X

- Definition

The amount, per share, of dividends proposed or declared before financial statements were authorised for issue but not recognised as distribution to owners.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 137
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_137_a&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwnersPerShare
Namespace Prefix:	ifrs-full_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount, per share, of dividends recognised as distributions to owners.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 107
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_107&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_DividendsRecognisedAsDistributionsToOwnersPerShare
Namespace Prefix:	ifrs-full_
Data Type:	num:perShareItemType
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 2018-01-01
-Paragraph 78
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78_e&doctype=Standard
-URIDate 2018-03-16

+ Details

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

X

- Definition

The number of shares issued by the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 106
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_106_d&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_NumberOfSharesIssued
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

A component of equity representing reserves within equity, not including retained earnings. [Refer: Retained earnings]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 78
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78_e&doctype=Standard
-URIDate 2018-03-16

+ Details

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

X

- Definition

A component of equity representing the entity's cumulative undistributed earnings or deficit.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 78
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78_e&doctype=Standard
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph IG6
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_IG6&doctype=Implementation%20Guidance
-URIDate 2018-03-16

+ Details

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

X

- Definition

An entity’s own equity instruments, held by the entity or other members of the consolidated group.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 78
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78_e&doctype=Standard
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 32
-IssueDate 2018-01-01
-Paragraph 34
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=32&date=2018-03-01&anchor=para_34&doctype=Standard
-URIDate 2018-03-16

+ Details

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

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_OrdinarySharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	e_ParentNameDomainAxis=e_ParentCompanysMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	ifrs-full_ComponentsOfEquityAxis=ifrs-full_MergerReserveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ComponentsOfEquityAxis=ifrs-full_TreasurySharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: