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Note 3 Contribution to consolidated group total assets entities by main activities (Details) - EUR (€)
€ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Contribution to Consolidated Group total assets [Line Items]      
Assets € 713,140 € 662,885 € 733,797
Banking and other financial services [Member]      
Contribution to Consolidated Group total assets [Line Items]      
Assets 678,788 631,683 703,304
Insurance and pension and investment fund managing companies [Member]      
Contribution to Consolidated Group total assets [Line Items]      
Assets 31,136 29,657 28,667
Other non-financial services [Member]      
Contribution to Consolidated Group total assets [Line Items]      
Assets € 3,217 € 1,545 € 1,826