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Note 32 Leverage Ratio (Details) - EUR (€)
€ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Leverage ratio [Line Items]      
Tier 1 € 45,687 € 49,597 € 49,701
Exposure to leverage ratio € 671,790 € 741,095 € 731,087
Leverage ratio 6.80% 6.69% 6.80%