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Property, plant and equipment (Details 2) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure Of Property Plant And Equipment Explanatory [Abstract] |  |  |
Costs for exploratory wells suspended - beginning of the period | € 1,263 | € 1,684 | € 1,737
Increases for which is ongoing the determination of proved reserves | 235 | 451 | 282
Amounts previously capitalized and expensed in the period |  | (217) | (109)
Reclassification to successful exploratory wells following the estimation of proved reserves |  | (278) | (276)
Disposals | (6) | (199) |
Decrease through loss of control of subsidiary | (4,877) |  |
Reclassification to assets held for sale | (24) |  |
Currency translation differences | 49 | (178) | 50
Costs for exploratory wells suspended - end of the period | € 1,101 | € 1,263 | € 1,684

X
- Definition The amount of costs for exploratory well that is pending the determination of proved reserves. + References No definition available. + Details
Name: | e_CostsForExploratoryWellsSuspended
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- Definition Additions to costs for exploratory well that were added during the reporting period pending the determination of proved reserves. + References No definition available. + Details
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X
- Definition Amount of costs for exploratory well for which proved reserves were not found at the exploratory well. + References No definition available. + Details
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X
- Definition Amount of increase (decrease) in exchange differences for exploratory wells. + References No definition available. + Details
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Namespace Prefix: | e_
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X
- Definition Disposal of exploratory well during the reporting period. + References No definition available. + Details
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- Definition Disclosure Of Property Plant And Equipment Explanatory + References No definition available. + Details
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- Definition The amount of reclassification of property,plant and equipment. + References No definition available. + Details
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Namespace Prefix: | e_
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X
- Definition Reclassified costs to productive wells on determination of proved reserves. + References No definition available. + Details
Name: | e_ReclassificationToProductiveWellsOnDeterminationOfProvedReserves
Namespace Prefix: | e_
Data Type: | xbrli:monetaryItemType
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X
- Definition The decrease in property, plant and equipment resulting from the loss of control of a subsidiary. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 16 -IssueDate 2018-01-01 -Paragraph 73 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2018-03-01&anchor=para_73_e&doctype=Standard -URIDate 2018-03-16 + Details
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