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Note 19 - Tax assets and liabilities- Effective tax rate (Details) - EUR (€) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Consolidated Tax Group [Member] |  |  |
Effective Tax Rate Line Items |  |  |
Current And Deferred Tax Relating To Items Charged Or Credited Directly To Equity | € (718,000,000) | € 1,482,000,000 | € (678,000,000)
Other Spanish Entities [Member] |  |  |
Effective Tax Rate Line Items |  |  |
Current And Deferred Tax Relating To Items Charged Or Credited Directly To Equity | 7,000,000 | 33,000,000 | 29,000,000
Foreign Entities [Member] |  |  |
Effective Tax Rate Line Items |  |  |
Current And Deferred Tax Relating To Items Charged Or Credited Directly To Equity | 7,109,000,000 | 6,931,000,000 | 7,580,000,000
Total Member |  |  |
Effective Tax Rate Line Items |  |  |
Current And Deferred Tax Relating To Items Charged Or Credited Directly To Equity | 6,398,000,000 | 8,446,000,000 | 6,931,000,000
Income Tax and Other Taxes [Member] |  |  |
Effective Tax Rate Line Items |  |  |
Current And Deferred Tax Relating To Items Charged Or Credited Directly To Equity | € 2,053,000,000 | € 2,219,000,000 | € 2,174,000,000
Effective Tax Rate [Member] |  |  |
Effective Tax Rate Line Items |  |  |
Percentage Effective Tax Rate | 32.10% | 26.30% | 31.40%

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- Definition The amount of Current And Deferred Tax Relating To Items Charged Or Credited Directly To Equity + References No definition available. + Details
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