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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, 2018 | Dec. 31, 2017 | Dec. 31, 2016
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Financial assets and liabilities held for trading Debt Securities Line Items |  |  |
Debt Instruments Held For Trading | € 25,577 | € 22,573 | € 27,166
Central Banks [Member] |  |  |
Financial assets and liabilities held for trading Debt Securities Line Items |  |  |
Debt Instruments Held For Trading | 1,001 | 1,371 | 544
General Government [Member] |  |  |
Financial assets and liabilities held for trading Debt Securities Line Items |  |  |
Debt Instruments Held For Trading | 22,950 | 19,344 | 23,621
Credit Institutions [Member] |  |  |
Financial assets and liabilities held for trading Debt Securities Line Items |  |  |
Debt Instruments Held For Trading | 790 | 816 | 1,652
Other [Member] |  |  |
Financial assets and liabilities held for trading Debt Securities Line Items |  |  |
Debt Instruments Held For Trading | 836 | 1,041 | 1,349
Total [Member] |  |  |
Financial assets and liabilities held for trading Debt Securities Line Items |  |  |
Debt Instruments Held For Trading | € 25,577 | € 22,573 | € 27,166

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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
Period Type: | duration

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- Details
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Data Type: | na
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
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Namespace Prefix: |
Data Type: | na
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- Details
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Data Type: | na
Balance Type: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |