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Note 33 - Employee Benefits - DWS Share Awards (Detail)
12 Months Ended
Dec. 31, 2023
EUR (€)
Dec. 31, 2022
EUR (€)
DWS Equity Plan [Member]    
Number of Awards [Abstract]    
Number of Awards Outstanding at beginning of year 2,329,000 2,415,000
Number of Awards Granted 1,213,000 1,005,000
Number of Awards Issued or Exercised (1,101,000) (1,042,000)
Number of Awards Forfeited (86,000) (55,000)
Number of Awards Expired 0  
Number of Awards Other Movements 22,000 6,000
Number of Awards Outstanding at end of year 2,377,000 2,329,000
Weighted-average exercise price [Abstract]    
Weighted-average exercise price outstanding, of which, exercisable € 0  
DWS SAR Plan [Member]    
Number of Awards [Abstract]    
Number of Awards Outstanding at beginning of year 887,000 948,000
Number of Awards Granted 0  
Number of Awards Issued or Exercised (122,000) (40,000)
Number of Awards Forfeited (10,000) (4,000)
Number of Awards Expired (18,000) (16,000)
Number of Awards Other Movements (1,000) (1)
Number of Awards of which, exercisable 695,000 678,000
Number of Awards Outstanding at end of year 735,000 887,000
Weighted-average exercise price [Abstract]    
Weighted-average exercise price outstanding at beginning of year € 24.65 € 24.65
Weighted-average exercise price issued or exercised 24.65 24.65
Weighted-average exercise price forfeited 24.65 24.65
Weighted-average exercise price expired 24.65 24.65
Weighted-average exercise price other movements 24.65 24.65
Weighted-average exercise price outstanding at end of year 24.65 24.65
Weighted-average exercise price outstanding, of which, exercisable € 24.65 € 24.65