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Note 53 - Related-Party Transactions - Balance Of Income Statement Arising From Transactions With Entities Of The Group (Details) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Related Party Transactions Abstract |  |  |
Financial incomes | € 26 | € 26 | € 53
Financial costs | 1 | 1 | 1
Fee And Commission Income | 5 | 5 | 5
Fee And Commission Expense | € 49 | € 58 | € 55

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
- Definition The amount of costs associated with financing activities of the entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 82 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_82_b&doctype=Standard -URIDate 2016-03-31 + Details
Name: | ifrs-full_FinanceCosts
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of income associated with interest and other financing activities of the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_85&doctype=Standard -URIDate 2016-03-31 + Details
Name: | ifrs-full_FinanceIncome
Namespace Prefix: | ifrs-full_
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