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Note 44 - Administration Costs - Share - Based Employee Remuneration (Details)
12 Months Ended
Dec. 31, 2017
EUR (€)
shares
Dec. 31, 2016
EUR (€)
Dec. 31, 2015
EUR (€)
Classes Of Employee Benefits Expense      
Expense From Share based Payment Transactions With Employees | € € 38,000,000 € 57,000,000 € 38,000,000
Disclosure Of Terms And Conditions Of Share based Payment Arrangement Line Items      
Number of shares received by the identify staff corresponding to the initial payment corresponding to previus year annual variable remuneration to be delivered in shares 6,481,409    
Deferred Remuneration Member [Member] | Second Third Member [Member]      
Disclosure Of Terms And Conditions Of Share based Payment Arrangement Line Items      
Number Of Instruments Granted In Share based Payment Arrangement 943,955    
Adjustment Amount Granted In Sharebased Payment Arrangement | € € 697,583    
Deferred Remuneration Member [Member] | Third Third Member [Member]      
Disclosure Of Terms And Conditions Of Share based Payment Arrangement Line Items      
Number Of Instruments Granted In Share based Payment Arrangement 437,069    
Adjustment Amount Granted In Sharebased Payment Arrangement | € € 501,318    
Regulatory Requirements Remuneration Member [Member] | First Third Member [Member]      
Disclosure Of Terms And Conditions Of Share based Payment Arrangement Line Items      
Number Of Instruments Granted In Share based Payment Arrangement 10,485    
Adjustment Amount Granted In Sharebased Payment Arrangement | € € 3,869    
Regulatory Requirements Remuneration Member [Member] | Second Third Member [Member]      
Disclosure Of Terms And Conditions Of Share based Payment Arrangement Line Items      
Number Of Instruments Granted In Share based Payment Arrangement 7,201    
Adjustment Amount Granted In Sharebased Payment Arrangement | € € 5,322    
Regulatory Requirements Remuneration Member [Member] | Third Third Member [Member]      
Disclosure Of Terms And Conditions Of Share based Payment Arrangement Line Items      
Number Of Instruments Granted In Share based Payment Arrangement 5,757    
Adjustment Amount Granted In Sharebased Payment Arrangement | € € 6,603    
Regulatory Requirements Remuneration Member [Member] | Total [Member]      
Disclosure Of Terms And Conditions Of Share based Payment Arrangement Line Items      
Number Of Instruments Granted In Share based Payment Arrangement 49,798    
BBVA Compass Member [Member] | Total [Member]      
Disclosure Of Terms And Conditions Of Share based Payment Arrangement Line Items      
Number Of Instruments Granted In Share based Payment Arrangement 331,111