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Note 10 - Financial assets and liabilities held for trading. Financial assets held for trading equity instruments by issuer (Details) - EUR (€) € in Millions | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
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Financial Assets and liabilities held for trading Equity Instruments Line Items |  |  |
Equity Instruments Held For Trading | € 5,254 | € 6,801 | € 4,675
Total domestic [Member] | Credit Institutions [Member] |  |  |
Financial Assets and liabilities held for trading Equity Instruments Line Items |  |  |
Equity Instruments Held For Trading | 576 | 617 | 781
Total domestic [Member] | Other [Member] |  |  |
Financial Assets and liabilities held for trading Equity Instruments Line Items |  |  |
Equity Instruments Held For Trading | 536 | 603 | 956
Total domestic [Member] | Total [Member] |  |  |
Financial Assets and liabilities held for trading Equity Instruments Line Items |  |  |
Equity Instruments Held For Trading | 1,112 | 1,220 | 1,737
Total foreign [Member] | Credit Institutions [Member] |  |  |
Financial Assets and liabilities held for trading Equity Instruments Line Items |  |  |
Equity Instruments Held For Trading | 304 | 345 | 220
Total foreign [Member] | Other [Member] |  |  |
Financial Assets and liabilities held for trading Equity Instruments Line Items |  |  |
Equity Instruments Held For Trading | 3,838 | 5,236 | 2,718
Total foreign [Member] | Total [Member] |  |  |
Financial Assets and liabilities held for trading Equity Instruments Line Items |  |  |
Equity Instruments Held For Trading | 4,142 | 5,581 | 2,939
Total [Member] | Total [Member] |  |  |
Financial Assets and liabilities held for trading Equity Instruments Line Items |  |  |
Equity Instruments Held For Trading | € 5,254 | € 6,801 | € 4,675

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- Definition The amount of equity instruments held for trading. [Refer: Equity instrument at fair value through profit or loss, classified as held for trading + References No definition available. + Details
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- References No definition available. + Details
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