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Note 16 - Investments in subsidiaries, joint ventures and associates - Associates Entities and joint ventures - Changes in the Year (Details) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Investments in subsidiaries, joint ventures and associates |  |  |
Investments In Subsidiaries Joint Ventures And Associates At The Beginning | € 1,588 | € 765 | € 879
Changes In Associates Entities And Joint Ventures Abstract |  |  |
Acquisitions And Capital Increases | 309 | 868 | 456
Disposals And Capital Reductions | (516) | (8) | (91)
Transfers And Changes Of Consolidation method | 211 | 0 | (351)
Share Of Profit And Loss | (7) | 3 | 25
Exchange Differences | 2 | (29) | (34)
Dividends Valuation Adjustments And Others | (8) | (12) | (118)
Investments In Subsidiaries Joint Ventures And Associates At The End | € 1,578 | € 1,588 | € 765
Percentage of company shares in equity received | 6.41% |  |

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- Definition The amount of investments in subsidiaries, joint ventures and associates in an entity's separate financial statements. [Refer: Associates [member]; Joint ventures [member]; Subsidiaries [member]; Investments in subsidiaries] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2018-01-01 -Paragraph 10 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2018-03-01&anchor=para_10&doctype=Standard -URIDate 2018-03-16 + Details
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