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Note 44 Administrative expenses (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of Other administrative expense [Line Items]      
Technology and systems € 1,394 € 1,176 € 1,088
Communication expense 195 175 172
Advertising expense 282 207 186
Property Fixtures And Materials expense 440 380 404
Taxes Other Than Income Tax 370 347 344
Surveillance and security service expense 214 179 161
Other expenses 925 786 749
Other expense, by function € 3,820 € 3,249 € 3,105