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Income tax payable (Details) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
DisclosureOfIncomeTaxExplanatoryLineItems [Line Items]
Income tax payable	€ 472	€ 426
Italian subsidiaries [Member]
DisclosureOfIncomeTaxExplanatoryLineItems [Line Items]
Income tax payable	174	97
Non Italian subsidiaries [Member]
DisclosureOfIncomeTaxExplanatoryLineItems [Line Items]
Income tax payable	€ 298	€ 329

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- References

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- Definition

The current amount of current tax liabilities. [Refer: Current tax liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 54
-Subparagraph n
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_n&doctype=Standard
-URIDate 2017-03-09

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