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Investments (Details 5) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
DisclosureOfInvestmentsLineItems [Line Items]
Other non-current provisions	€ 13,447	€ 13,896
Equity-accounted investments [Member]
DisclosureOfInvestmentsLineItems [Line Items]
Other non-current provisions	182	151
Equity-accounted investments [Member] | Matrica SpA [Member]
DisclosureOfInvestmentsLineItems [Line Items]
Other non-current provisions	38
Industria Siciliana Acido Fosforico - ISAF SPA [Member] | Equity-accounted investments [Member]
DisclosureOfInvestmentsLineItems [Line Items]
Other non-current provisions	95	95
VIC CBM Ltd [Member] | Equity-accounted investments [Member]
DisclosureOfInvestmentsLineItems [Line Items]
Other non-current provisions	30	34
PetroBicentenario SA [Member] | Equity-accounted investments [Member]
DisclosureOfInvestmentsLineItems [Line Items]
Other non-current provisions	12	6
Societe Centrale Eletrique du Congo SA[member] | Equity-accounted investments [Member]
DisclosureOfInvestmentsLineItems [Line Items]
Other non-current provisions	6	7
Other Related Parties [Member] | Equity-accounted investments [Member]
DisclosureOfInvestmentsLineItems [Line Items]
Other non-current provisions	€ 1	€ 9

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- References

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- Definition

The amount of non-current provisions other than provisions for employee benefits. [Refer: Non-current provisions]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 78
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_78_d&doctype=Standard
-URIDate 2017-03-09

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