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Note 53 - Related-Party Transactions - Balance Of Income Statement Arising From Transactions With Entities Of The Group (Details) - EUR (€) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Related Party Transactions Abstract |  |  |
Interest Income And Other Similar Interest Incomes | € 20,000,000 | € 19,000,000 | € 55,000,000
Interest Expenses From Operations With Group Entities | 1,000,000 | 1,000,000 | 2,000,000
Fee And Commission Income | 5,000,000 | 4,000,000 | 5,000,000
Fee And Commission Expense | € 34,000,000 | € 53,000,000 | € 48,000,000

X
- Definition The amount of fee and commission expense arising from group entities. + References No definition available. + Details
Name: | bbva_Feeandcommissionexpensegroupentities
Namespace Prefix: | bbva_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of fee and commission income arising from group entities. + References No definition available. + Details
Name: | bbva_Feeandcommissionincomegroupentities
Namespace Prefix: | bbva_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | bbva_Interestexpensesfromoperationswithgroupentities
Namespace Prefix: | bbva_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | bbva_InterestincomeandothersimilarinterestIncomes
Namespace Prefix: | bbva_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_RelatedPartyTransactionsAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration