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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
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%