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Note 13 - Financial assets at fair value through other comprehensive income equity instruments (Details) - EUR (€) | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
National Company Shares [Member] |  |  |
Available for sale financial assets equity instruments [Line Items] |  |  |
Amortized cost equity instruments available for sale financial assets | € 2,182,000,000 | € 2,181,000,000 | € 2,172,000,000
Unrealized Gains equity instruments available for sale financial assets | 0 | 0 | 0
Unrealized losses equity instruments available for sale financial assets | (1,309,000,000) | (507,000,000) | (210,000,000)
Equity instruments, available-for-sale | 873,000,000 | 1,674,000,000 | 1,962,000,000
Foreign Company Shares [Member] |  |  |
Available for sale financial assets equity instruments [Line Items] |  |  |
Amortized cost equity instruments available for sale financial assets | 100,000,000 | 136,000,000 | 90,000,000
Unrealized Gains equity instruments available for sale financial assets | 38,000,000 | 87,000,000 | 43,000,000
Unrealized losses equity instruments available for sale financial assets | (17,000,000) | (11,000,000) | (12,000,000)
Equity instruments, available-for-sale | 121,000,000 | 213,000,000 | 121,000,000
Foreign Company Shares [Member] | United States [Member] |  |  |
Available for sale financial assets equity instruments [Line Items] |  |  |
Amortized cost equity instruments available for sale financial assets | 27,000,000 | 30,000,000 | 20,000,000
Unrealized Gains equity instruments available for sale financial assets | 0 | 47,000,000 | 17,000,000
Unrealized losses equity instruments available for sale financial assets | 0 | 0 | 0
Equity instruments, available-for-sale | 27,000,000 | 78,000,000 | 37,000,000
Foreign Company Shares [Member] | Mexico [Member] |  |  |
Available for sale financial assets equity instruments [Line Items] |  |  |
Amortized cost equity instruments available for sale financial assets | 1,000,000 | 1,000,000 | 1,000,000
Unrealized Gains equity instruments available for sale financial assets | 33,000,000 | 33,000,000 | 25,000,000
Unrealized losses equity instruments available for sale financial assets | 0 | 0 | 0
Equity instruments, available-for-sale | 34,000,000 | 34,000,000 | 26,000,000
Foreign Company Shares [Member] | Turkey [Member] |  |  |
Available for sale financial assets equity instruments [Line Items] |  |  |
Amortized cost equity instruments available for sale financial assets | 2,000,000 | 3,000,000 | 3,000,000
Unrealized Gains equity instruments available for sale financial assets | 4,000,000 | 2,000,000 | 0
Unrealized losses equity instruments available for sale financial assets | 0 | 0 | (1,000,000)
Equity instruments, available-for-sale | 6,000,000 | 5,000,000 | 2,000,000
Foreign Company Shares [Member] | Other countries [Member] |  |  |
Available for sale financial assets equity instruments [Line Items] |  |  |
Amortized cost equity instruments available for sale financial assets | 70,000,000 | 102,000,000 | 66,000,000
Unrealized Gains equity instruments available for sale financial assets | 1,000,000 | 5,000,000 | 1,000,000
Unrealized losses equity instruments available for sale financial assets | (17,000,000) | (11,000,000) | (11,000,000)
Equity instruments, available-for-sale | 54,000,000 | 96,000,000 | 56,000,000
Subtotal Listed Equity [Member] |  |  |
Available for sale financial assets equity instruments [Line Items] |  |  |
Amortized cost equity instruments available for sale financial assets | 2,282,000,000 | 2,317,000,000 | 2,262,000,000
Unrealized Gains equity instruments available for sale financial assets | 38,000,000 | 87,000,000 | 43,000,000
Unrealized losses equity instruments available for sale financial assets | (1,326,000,000) | (518,000,000) | (222,000,000)
Equity instruments, available-for-sale | 995,000,000 | 1,886,000,000 | 2,083,000,000
National Company Shares Unlisted [Member] |  |  |
Available for sale financial assets equity instruments [Line Items] |  |  |
Amortized cost equity instruments available for sale financial assets | 5,000,000 | 5,000,000 | 6,000,000
Unrealized Gains equity instruments available for sale financial assets | 1,000,000 | 1,000,000 | 1,000,000
Unrealized losses equity instruments available for sale financial assets | 0 | 0 | 0
Equity instruments, available-for-sale | 5,000,000 | 5,000,000 | 7,000,000
Foreign Company Shares Unlisted [Member] |  |  |
Available for sale financial assets equity instruments [Line Items] |  |  |
Amortized cost equity instruments available for sale financial assets | 58,000,000 | 450,000,000 | 453,000,000
Unrealized Gains equity instruments available for sale financial assets | 43,000,000 | 79,000,000 | 54,000,000
Unrealized losses equity instruments available for sale financial assets | (1,000,000) | (1,000,000) | (1,000,000)
Equity instruments, available-for-sale | 100,000,000 | 528,000,000 | 506,000,000
Foreign Company Shares Unlisted [Member] | United States [Member] |  |  |
Available for sale financial assets equity instruments [Line Items] |  |  |
Amortized cost equity instruments available for sale financial assets | 0 | 387,000,000 | 388,000,000
Unrealized Gains equity instruments available for sale financial assets | 0 | 32,000,000 | 23,000,000
Unrealized losses equity instruments available for sale financial assets | 0 | 0 | 0
Equity instruments, available-for-sale | 0 | 419,000,000 | 411,000,000
Foreign Company Shares Unlisted [Member] | Mexico [Member] |  |  |
Available for sale financial assets equity instruments [Line Items] |  |  |
Amortized cost equity instruments available for sale financial assets | 0 | 0 | 0
Unrealized Gains equity instruments available for sale financial assets | 0 | 0 | 0
Unrealized losses equity instruments available for sale financial assets | 0 | 0 | 0
Equity instruments, available-for-sale | 0 | 0 | 0
Foreign Company Shares Unlisted [Member] | Turkey [Member] |  |  |
Available for sale financial assets equity instruments [Line Items] |  |  |
Amortized cost equity instruments available for sale financial assets | 5,000,000 | 5,000,000 | 6,000,000
Unrealized Gains equity instruments available for sale financial assets | 0 | 4,000,000 | 4,000,000
Unrealized losses equity instruments available for sale financial assets | 0 | 0 | 0
Equity instruments, available-for-sale | 5,000,000 | 9,000,000 | 10,000,000
Foreign Company Shares Unlisted [Member] | Other countries [Member] |  |  |
Available for sale financial assets equity instruments [Line Items] |  |  |
Amortized cost equity instruments available for sale financial assets | 52,000,000 | 57,000,000 | 59,000,000
Unrealized Gains equity instruments available for sale financial assets | 43,000,000 | 43,000,000 | 27,000,000
Unrealized losses equity instruments available for sale financial assets | (1,000,000) | (1,000,000) | (1,000,000)
Equity instruments, available-for-sale | 94,000,000 | 99,000,000 | 85,000,000
Subtotal Unlisted Equity [Member] |  |  |
Available for sale financial assets equity instruments [Line Items] |  |  |
Amortized cost equity instruments available for sale financial assets | 62,000,000 | 454,000,000 | 459,000,000
Unrealized Gains equity instruments available for sale financial assets | 44,000,000 | 80,000,000 | 55,000,000
Unrealized losses equity instruments available for sale financial assets | (1,000,000) | (1,000,000) | (1,000,000)
Equity instruments, available-for-sale | 105,000,000 | 533,000,000 | 513,000,000
Total Member |  |  |
Available for sale financial assets equity instruments [Line Items] |  |  |
Amortized cost equity instruments available for sale financial assets | 2,344,000,000 | 2,772,000,000 | 2,721,000,000
Unrealized Gains equity instruments available for sale financial assets | 82,000,000 | 167,000,000 | 98,000,000
Unrealized losses equity instruments available for sale financial assets | (1,327,000,000) | (519,000,000) | (223,000,000)
Equity instruments, available-for-sale | € 1,100,000,000 | € 2,420,000,000 | € 2,595,000,000

X
- Definition The amount of debt securities available for sale held by the Entity, valued at amortized cost. + References No definition available. + Details
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Namespace Prefix: | bbva_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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X
- References No definition available. + Details
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Namespace Prefix: | bbva_
Data Type: | xbrli:stringItemType
Balance Type: | na
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X
- Definition The amount of equity instruments held, categorize as available for sale, net carrying value. + References No definition available. + Details
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Namespace Prefix: | bbva_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of unrealized gains associated to equity instruments available for sale held by the Entity. + References No definition available. + Details
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Namespace Prefix: | bbva_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of unrealized losses associated to equity instruments available for sale held by the Entity. + References No definition available. + Details
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Namespace Prefix: | bbva_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Details
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- Details
Name: | bbva_TypeofequityinstrumentaxisAxis=bbva_ForeigncompanysharesMember
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Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | bbva_GeographyequityinstrumentsAxis=country_US
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Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | bbva_GeographyequityinstrumentsAxis=country_MX
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | bbva_GeographyequityinstrumentsAxis=country_TK
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Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | bbva_GeographyequityinstrumentsAxis=bbva_OtherCountriesMember
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Data Type: | na
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- Details
Name: | bbva_TypeofequityinstrumentaxisAxis=bbva_SubtotallistedequityMember
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Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | bbva_TypeofequityinstrumentaxisAxis=bbva_NationalcompanysharesunlistedMember
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Data Type: | na
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- Details
Name: | bbva_TypeofequityinstrumentaxisAxis=bbva_ForeigncompanysharesunlistedMember
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Data Type: | na
Balance Type: |
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- Details
Name: | bbva_TypeofequityinstrumentaxisAxis=bbva_SubtotalunlistedequityMember
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Data Type: | na
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