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Note 19 Secured tax assets (Details) - EUR (€)
€ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Secured tax assets [Line Items]      
Secured pensions tax assets € 1,622 € 1,622 € 1,622
Secured loss allowances tax assets 6,357 6,912 7,067
Total secured tax assets € 7,979 € 8,534 € 8,689