Note 34 - Share of profit or loss of entities accounted for using the equity method (Details) - EUR (€) € in Millions	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017
Share of profit or loss of entities accounted for using the equity method
investments in entities accounted for using the equity method	€ 14	€ (8)

The entity's share of the profit (loss) of associates and joint ventures accounted for using the equity method. [Refer: Associates [member]; Investments accounted for using equity method; Joint ventures [member]; Profit (loss)]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective on first application of IFRS 9
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