Note 53 - Related-Party Transactions - Balance Of Income Statement Arising From Transactions With Entities Of The Group (Details) - EUR (€) € in Millions	12 Months Ended
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

The amount of fee and commission expense arising from group entities.

No definition available.

Name:	bbva_Feeandcommissionexpensegroupentities
Namespace Prefix:	bbva_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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

- 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

- 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

- References

No definition available.

+ Details

Name:	ifrs-full_RelatedPartyTransactionsAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration