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Cash and cash equivalents (Details Textual) - EUR (€) € in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | [1] | Dec. 31, 2015
Cash and cash equivalents | € 10,836 | [1] | € 7,363 | [1] | € 5,674 | € 5,209
Short-term deposits, classified as cash equivalents | 8,732 |  | € 5,591 |  |  |
Euro [Member] |  |  |  |  |  |
Short-term deposits, classified as cash equivalents | € 7,653 |  |  |  |  |
Avearge Maturity Period | 29 days |  |  |  |  |
Internal Rate Of Return | 0.29% |  |  |  |  |
US Dollars [Member] |  |  |  |  |  |
Short-term deposits, classified as cash equivalents | € 1,074 |  |  |  |  |
Avearge Maturity Period | 12 days |  |  |  |  |
Internal Rate Of Return | 2.59% |  |  |  |  |
[1] | Cash and cash equivalents as of December 31, 2018, include €19 million of cash and cash equivalents of consolidated subsidiaries held for sale that were reported in the item Assets held for sale in the balance sheet

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- Definition The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2018-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2018-03-01&anchor=para_45&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2018-01-01 -Paragraph B13 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2018-03-01&anchor=para_B13_a&doctype=Appendix&seq=2 -URIDate 2018-03-16 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 54 -Subparagraph i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_54_i&doctype=Standard -URIDate 2018-03-16 + Details
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