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Note 19 Secured tax assets (Details) - EUR (€)
€ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Secured tax assets [Line Items]      
Secured pensions tax assets € 1,622 € 1,759 € 1,924
Secured loss allowances tax assets 7,067 7,545 7,437
Total secured tax assets € 8,689 € 9,304 € 9,361