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Note 29 - Treasury Shares - Percentage Treasury Stock (Details) | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Bottom Of Range [Member] |  |  |
Treasury Stock Line Items |  |  |
Percentage Treasury Stock | 0.004% | 0.081% | 0.00%
Top Of Range [Member] |  |  |
Treasury Stock Line Items |  |  |
Percentage Treasury Stock | 0.278% | 0.756% | 0.806%
Closing Range |  |  |
Treasury Stock Line Items |  |  |
Percentage Treasury Stock | 0.20% | 0.11% | 0.613%

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- Definition The percentage of shares of BBVA group owned by the main shareholders. + References No definition available. + Details
Name: | bbva_Percentagetreasurystock
Namespace Prefix: | bbva_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

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- Details
Name: | bbva_RangeofpercentajetreasurystockaxisAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | bbva_RangeofpercentajetreasurystockaxisAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bbva_RangeofpercentajetreasurystockaxisAxis=bbva_ClosingrangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |