v3.26.1
Valuation results and net trading income - Summary of valuation results and net trading income (Details) - EUR (€)
€ in Millions
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Valuation Results And Net Trading Income [Line Items]    
Securities trading results € 2,573 € 2,194
Derivatives trading results (1,810) (1,169)
Other trading results (141) 165
Change in fair value of assets and liabilities (hedged items) 122 (667)
Valuation results on assets and liabilities designated and mandatory at FVPL (excluding trading) (85) 55
Foreign exchange transactions results 128 3,190
Valuation results and net trading income 599 2,773
–  fair value hedges    
Valuation Results And Net Trading Income [Line Items]    
Change in fair value of derivatives relating to (149) 671
–  cash flow hedges (ineffective portion)    
Valuation Results And Net Trading Income [Line Items]    
Change in fair value of derivatives relating to 15 4
–  other non-trading derivatives    
Valuation Results And Net Trading Income [Line Items]    
Change in fair value of derivatives relating to € (54) € (1,669)