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Property, plant and equipment (Details 1) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
DisclosureOfPropertyPlantAndEquipmentExplanatoryLineItems [Line Items] |  |
Additions other than through business combinations, property, plant and equipment | € 8,490 | € 9,067
Exploration & Production Segment [Member] |  |
DisclosureOfPropertyPlantAndEquipmentExplanatoryLineItems [Line Items] |  |
Additions other than through business combinations, property, plant and equipment | 7,638 | 8,217
Gas & Power Segment [Member] |  |
DisclosureOfPropertyPlantAndEquipmentExplanatoryLineItems [Line Items] |  |
Additions other than through business combinations, property, plant and equipment | 87 | 66
Refining & Marketing and Chemical segment [Member] |  |
DisclosureOfPropertyPlantAndEquipmentExplanatoryLineItems [Line Items] |  |
Additions other than through business combinations, property, plant and equipment | 712 | 655
Corporate And Other Activities [Member] |  |
DisclosureOfPropertyPlantAndEquipmentExplanatoryLineItems [Line Items] |  |
Additions other than through business combinations, property, plant and equipment | 69 | 42
Elimination of intragroup profits [Member] |  |
DisclosureOfPropertyPlantAndEquipmentExplanatoryLineItems [Line Items] |  |
Additions other than through business combinations, property, plant and equipment | € (16) | € 87

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- Definition The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 73 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73_e_i&doctype=Standard -URIDate 2017-03-09 + Details
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