Restructuring - Net Restructuring Expense by Division (Detail) - EUR (€) € in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Net Restructuring Expense by Division [Line Items] | |||
| Total Net Restructuring Charges | € (15) | € (3) | € 220 |
| Total Net Restructuring Charges | |||
| Net Restructuring Expense by Division [Line Items] | |||
| Total Net Restructuring Charges | (15) | (3) | 220 |
| Corporate Bank | |||
| Net Restructuring Expense by Division [Line Items] | |||
| Total Net Restructuring Charges | 0 | (1) | (4) |
| Investment Bank | |||
| Net Restructuring Expense by Division [Line Items] | |||
| Total Net Restructuring Charges | 0 | 0 | (3) |
| Private Bank | |||
| Net Restructuring Expense by Division [Line Items] | |||
| Total Net Restructuring Charges | (15) | (3) | 228 |
| Asset Management | |||
| Net Restructuring Expense by Division [Line Items] | |||
| Total Net Restructuring Charges | 0 | 0 | 0 |
| Corporate & Other | |||
| Net Restructuring Expense by Division [Line Items] | |||
| Total Net Restructuring Charges | € 0 | € 0 | € (1) |