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Note 10 - Financial assets and liabilities held for trading - Financial assets held for trading debt securities by issuer (Details) - EUR (€) € in Millions | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
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Financial assets and liabilities held for trading Debt Securities [Line Items] |  |  |
Debt Instruments Held For Trading | € 22,573 | € 27,166 | € 32,825
Central Banks [Member] |  |  |
Financial assets and liabilities held for trading Debt Securities [Line Items] |  |  |
Debt Instruments Held For Trading | 1,371 | 544 | 214
General Government [Member] |  |  |
Financial assets and liabilities held for trading Debt Securities [Line Items] |  |  |
Debt Instruments Held For Trading | 19,344 | 23,621 | 29,240
Credit Institutions [Member] |  |  |
Financial assets and liabilities held for trading Debt Securities [Line Items] |  |  |
Debt Instruments Held For Trading | 816 | 1,652 | 1,766
Other [Member] |  |  |
Financial assets and liabilities held for trading Debt Securities [Line Items] |  |  |
Debt Instruments Held For Trading | 1,041 | 1,349 | 1,606
Total [Member] |  |  |
Financial assets and liabilities held for trading Debt Securities [Line Items] |  |  |
Debt Instruments Held For Trading | € 22,573 | € 27,166 | € 32,825

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- Definition The amount of debt instruments held for trading. [Refer: Debt instruments; Debt instruments at fair value through profit or loss, classified as held for trading] + References No definition available. + Details
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Namespace Prefix: | bbva_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | bbva_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Details
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- Details
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- Details
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- Details
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- Details
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