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Note 19 - Tax assets and liabilities- Tax Recognized in Total Equity (Details) - EUR (€) € in Millions | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
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Debt Securities and Other [Member] |  |  |
Disclosure of tax assets and liabilties Line Items |  |  |
Tax Recognized - Total Equity | € (87) | € (355) | € (533)
Equity instruments [Member] |  |  |
Disclosure of tax assets and liabilties Line Items |  |  |
Tax Recognized - Total Equity | (56) | (74) | (2)
Subtotal [Member] |  |  |
Disclosure of tax assets and liabilties Line Items |  |  |
Tax Recognized - Total Equity | (143) | (429) | (535)
Total [Member] |  |  |
Disclosure of tax assets and liabilties Line Items |  |  |
Tax Recognized - Total Equity | € (143) | € (429) | € (535)

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- Definition The amount of tax recognized in total equity + References No definition available. + Details
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