XML 190 R183.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Provisions for employee benefits (Details 2) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Statement Line Items [Line Items] |  |  |
Employee benefits expense | € 2,951 | € 2,994 | € 3,119
Profit and loss [Member] |  |  |
Statement Line Items [Line Items] |  |  |
Current cost | 80 | 86 |
Past service cost and (gains) losses on settlements | 29 | (5) |
- interest cost on liabilities | 35 | 44 |
- interest income on plan assets | (20) | (20) |
Total interest cost (income), net | 15 | 24 |
Remeasurements for long-term plans | 3 | (1) |
Employee benefits expense | 127 | 104 |
Payroll and related cost [Member] |  |  |
Statement Line Items [Line Items] |  |  |
Total interest cost (income), net | 1 | 1 |
Employee benefits expense | 113 | 81 |
Financial income (expense) [Member] |  |  |
Statement Line Items [Line Items] |  |  |
Total interest cost (income), net | 14 | 23 |
Employee benefits expense | 14 | 23 |
TFR [Member] |  |  |
Statement Line Items [Line Items] |  |  |
- interest cost on liabilities | 3 | 6 |
Total interest cost (income), net | 3 | 6 |
Employee benefits expense | 3 | 6 |
TFR [Member] | Financial income (expense) [Member] |  |  |
Statement Line Items [Line Items] |  |  |
Total interest cost (income), net | 3 | 6 |
Employee benefits expense | 3 | 6 |
Foreign defined benefit plans [Member] |  |  |
Statement Line Items [Line Items] |  |  |
Current cost | 24 | 28 |
Past service cost and (gains) losses on settlements | (1) | (4) |
- interest cost on liabilities | 29 | 34 |
- interest income on plan assets | (20) | (20) |
Total interest cost (income), net | 9 | 14 |
Employee benefits expense | 32 | 38 |
Foreign defined benefit plans [Member] | Payroll and related cost [Member] |  |  |
Statement Line Items [Line Items] |  |  |
Employee benefits expense | 23 | 24 |
Foreign defined benefit plans [Member] | Financial income (expense) [Member] |  |  |
Statement Line Items [Line Items] |  |  |
Total interest cost (income), net | 9 | 14 |
Employee benefits expense | 9 | 14 |
FISDE and other foreign medical plans [Member] |  |  |
Statement Line Items [Line Items] |  |  |
Current cost | 2 | 2 |
Past service cost and (gains) losses on settlements |  | 2 |
- interest cost on liabilities | 2 | 3 |
Total interest cost (income), net | 2 | 3 |
Employee benefits expense | 4 | 7 |
FISDE and other foreign medical plans [Member] | Payroll and related cost [Member] |  |  |
Statement Line Items [Line Items] |  |  |
Employee benefits expense | 2 | 4 |
FISDE and other foreign medical plans [Member] | Financial income (expense) [Member] |  |  |
Statement Line Items [Line Items] |  |  |
Total interest cost (income), net | 2 | 3 |
Employee benefits expense | 2 | 3 |
Other benefit plans [Member] |  |  |
Statement Line Items [Line Items] |  |  |
Current cost | 54 | 56 |
Past service cost and (gains) losses on settlements | 30 | (3) |
- interest cost on liabilities | 1 | 1 |
Total interest cost (income), net | 1 | 1 |
Remeasurements for long-term plans | 3 | (1) |
Employee benefits expense | 88 | 53 |
Other benefit plans [Member] | Payroll and related cost [Member] |  |  |
Statement Line Items [Line Items] |  |  |
Total interest cost (income), net | 1 | 1 |
Employee benefits expense | € 88 | € 53 |

X
- References No definition available. + Details
Name: | E_IfrsStatementLineItems
Namespace Prefix: | E_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of interest expense on liabilities. + References No definition available. + Details
Name: | E_InterestCostOnLiabilities
Namespace Prefix: | E_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of interest income on plan assets. + References No definition available. + Details
Name: | E_InterestIncomeOnPlanAssets
Namespace Prefix: | E_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from employee service in the current period. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_a&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The expense of all forms of consideration given by an entity in exchange for a service rendered by employees or for the termination of employment. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 102 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_102&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 99 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_99&doctype=Standard -URIDate 2017-03-09 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 104 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_104&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_EmployeeBenefitsExpense
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The increase (decrease) in reimbursement rights resulting from the remeasurement of reimbursement rights. [Refer: Reimbursement rights, at fair value] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_c&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_GainLossOnRemeasurementOfReimbursementRights
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from the passage of time. [Refer: Interest expense; Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_b&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from past service cost and gains (losses) arising from settlements. [Refer: Gains (losses) arising from settlements, net defined benefit liability (asset); Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_d&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_PastServiceCostAndGainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | E_IncomeStatementAxis=E_ProfitAndLossMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | E_IncomeStatementAxis=E_PayrollAndRelatedCostMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | E_IncomeStatementAxis=E_FinancialIncomeExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=E_TFRMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=ifrs-full_ForeignDefinedBenefitPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=E_SupplementaryMedicalReserveForEniManagersFISDEAndOtherForeignMedicalPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=E_OtherForeignLongTermBenefitPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |