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Note 26 - Common Stock - Custody Of Share (Details) | 12 Months Ended
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Dec. 31, 2018
State Street Bank and Trust Co [Member] |
Disclosure Of Custodied Shares Line Items |
Percentage Of Shares Custodied | 10.69%
Chase Nominees Ltd [Member] |
Disclosure Of Custodied Shares Line Items |
Percentage Of Shares Custodied | 6.33%
The Bank of New York Mellon SANV [Member] |
Disclosure Of Custodied Shares Line Items |
Percentage Of Shares Custodied | 2.31%

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- References No definition available. + Details
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Namespace Prefix: | bbva_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

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- Details
Name: | bbva_CustodianbanksAxis=bbva_StatestreetbankandtrustcoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | bbva_CustodianbanksAxis=bbva_ChasenomineesltdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bbva_CustodianbanksAxis=bbva_ThebankofnewyorkmellonsanvMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |