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Note 17 - Tangible assets - Subsidiaries (Details) - EUR (€) € in Millions | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Tangible Assets By Geography [Line Items] |  |  |
Tangible Assets | € 7,191 | € 8,941 | € 9,944
Issued in Euros [Member] |  |  |
Tangible Assets By Geography [Line Items] |  |  |
Tangible Assets | 2,574 | 3,692 | 4,584
Total foreign [Member] |  |  |
Tangible Assets By Geography [Line Items] |  |  |
Tangible Assets | € 4,617 | € 5,249 | € 5,360

X
- Definition The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period. (c )The amount of property (land or a building - or part of a building - or both) held (by the owner or by the lessee under a finance lease) to earn rentals or for capital appreciation or both + 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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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bbva_GeographyspanishandforeignAxis=bbva_TotalforeignMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |