Note 55 - Other Information - Profit Attributable By Operating Segments (Details) - EUR (€)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Profit Attributable By Operating Segments
Profit or loss attributable to owners of the parent	€ 3,512,000,000	€ 5,400,000,000	€ 3,514,000,000

The profit (loss) from continuing and discontinued operations attributable to owners of the parent. [Refer: Profit (loss)]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 81B
-Subparagraph a
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_81B_a_ii&doctype=Standard
-URIDate 2019-03-27

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration