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Cash and cash equivalents | 12 Months Ended
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Dec. 31, 2017
Disclosure Of Cash And Cash Equivalents [Abstract] |
Disclosure of cash and cash equivalents [text block] | 8 Cash and cash equivalents Cash and cash equivalents of  €7,363 million (€5,674 million at December 31, 2016) included financial assets with maturity of up to three months at the date of inception amounting to €5,591 million (€4,379 million at December 31, 2016) and mainly included short-term deposits with financial institutions having notice of more than 48 hours. The average maturity of financial assets due within 90 days was 7 days and the average interest rate was negative and amounted to 0.03% (negative 0.01% at December 31, 2016).

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- Definition The disclosure of cash and cash equivalents. [Refer: Cash and cash equivalents] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_10_e&doctype=Standard -URIDate 2017-03-09 + Details
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