XML 242 R131.htm IDEA: XBRL DOCUMENT
v3.21.1

Finance debts - Fair value of long-term debt (Details) - EUR (€) € in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Long-term debt and current portion of long-term debt |  |
Borrowings |  |
Financial liabilities, at fair value | € 26,970 | € 22,528
Long-term and current portion of long-term ordinary bonds |  |
Borrowings |  |
Financial liabilities, at fair value | 22,429 | 19,173
Long-term and current portion of long-term convertible bonds |  |
Borrowings |  |
Financial liabilities, at fair value | 497 | 402
Long-term and current portion of long-term bank debt |  |
Borrowings |  |
Financial liabilities, at fair value | 4,008 | 2,904
Long-term and current portion of long-term debt with other financial institutions |  |
Borrowings |  |
Financial liabilities, at fair value | € 36 | € 49

X
- Definition Disclosure Of Borrowings Explanatory + References No definition available. + Details
Name: | e_DisclosureOfInformationOnNetBorrowingsLineItems
Namespace Prefix: | e_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The fair value of financial liabilities. [Refer: At fair value [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_25&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_FinancialLiabilitiesAtFairValue
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=e_LongTermDebtAndCurrentPortionOfLongtermDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=e_LongTermAndCurrentPortionOfLongtermOrdinaryBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=e_LongTermAndCurrentPortionOfLongTermConvertibleBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=e_LongTermAndCurrentPortionOfLongTermBankDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=e_LongTermAndCurrentPortionOfLongTermDebtWithOtherFinancialInstitutionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |