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Note 36 Transactions on behalf of third parties breakdown by concepts (Details) - EUR (€)
€ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Transactions on behalf of third parties [Line Items]      
Financial instruments entrusted by third parties € 496,082 € 430,377 € 352,139
Conditional bills and other securities received for collection 13,460 12,125 11,738
Securities lending on behalf of third parties 5,700 6,397 3,223
Total transactions on behalf of third parties € 515,241 € 448,899 € 367,100