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Note 29 Leverage ratio (Details) - EUR (€)
€ in Millions
Jun. 30, 2023
Dec. 31, 2022
Leverage ratio [Line Items]    
Tier 1 € 51,324 [1] € 47,931
Exposure to leverage ratio € 792,051 [1] € 738,413
Leverage ratio 6.48% 6.49%
[1] (1) Provisional data