v3.25.4
Provisions - Movements by Class of Provision (Detail) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Total    
Movements by Class of Provision [Line Items]    
Balance as of, start period € 2,958 [1] € 2,047
Changes in the group of consolidated companies [1] 0 0
New provisions [1] 646 2,751
Amounts used [1] 1,241 1,086
Unused amounts reversed [1] 346 773
Effects from exchange rate fluctuations/Unwind of discount [1] (24) 5
Transfers [1] 11 13
Balance as of, end period [1] 2,004 2,958
Operational Risk    
Movements by Class of Provision [Line Items]    
Balance as of, start period 40 40
Changes in the group of consolidated companies 0 0
New provisions 37 6
Amounts used 8 2
Unused amounts reversed 1 4
Effects from exchange rate fluctuations/Unwind of discount 0 0
Transfers 0 0
Balance as of, end period 66 40
Civil Litigations    
Movements by Class of Provision [Line Items]    
Balance as of, start period 1,895 1,124
Changes in the group of consolidated companies 0 0
New provisions 293 2,201
Amounts used 822 954
Unused amounts reversed 181 509
Effects from exchange rate fluctuations/Unwind of discount (4) 3
Transfers 11 30
Balance as of, end period 1,192 1,895
Regulatory Enforcement    
Movements by Class of Provision [Line Items]    
Balance as of, start period 166 129
Changes in the group of consolidated companies 0 0
New provisions 84 84
Amounts used 74 8
Unused amounts reversed 17 41
Effects from exchange rate fluctuations/Unwind of discount (7) 2
Transfers 0 0
Balance as of, end period 152 166
Restructuring    
Movements by Class of Provision [Line Items]    
Balance as of, start period 273 333
Changes in the group of consolidated companies 0 0
New provisions 36 149
Amounts used 106 55
Unused amounts reversed 53 153
Effects from exchange rate fluctuations/Unwind of discount 0 0
Transfers 0 0
Balance as of, end period 151 273
Other    
Movements by Class of Provision [Line Items]    
Balance as of, start period 584 421
Changes in the group of consolidated companies 0 0
New provisions 196 312
Amounts used 231 67
Unused amounts reversed 95 66
Effects from exchange rate fluctuations/Unwind of discount (12) 1
Transfers 0 (16)
Balance as of, end period € 442 € 584
[1] For the remaining portion of provisions as disclosed on the consolidated balance sheet, please see Note 19 “Allowance for Credit Losses”, in which allowances for credit
related off-balance sheet positions are disclosed