v3.25.4
Goodwill and Other Intangible Assets - Changes in Goodwill (Detail) - EUR (€)
€ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2023
Dec. 31, 2025
Dec. 31, 2024
Reconciliation of changes in goodwill [abstract]      
Goodwill, balance, period start   € 2,963 € 2,849
Goodwill acquired during the year   0 0
Purchase accounting adjustments   0 0
Transfers   0 0
Reclassification from (to) “held for sale”   0 0
Goodwill related to dispositions without being classified as “held for sale”   0 0
Impairment losses € 233 0 [1] 0 [1]
Exchange rate changes/other   (227) 114
Goodwill, balance, period end 2,849 2,735 2,963
Gross amount of goodwill   11,482 12,275
Accumulated impairment losses   (8,746) (9,313)
Corporate Bank      
Reconciliation of changes in goodwill [abstract]      
Goodwill, balance, period start   0 0
Goodwill acquired during the year   0 0
Purchase accounting adjustments   0 0
Transfers   0 0
Reclassification from (to) “held for sale”   0 0
Goodwill related to dispositions without being classified as “held for sale”   0 0
Impairment losses [1]   0 0
Exchange rate changes/other   0 0
Goodwill, balance, period end 0 0 0
Gross amount of goodwill   590 643
Accumulated impairment losses   (590) (643)
Investment Bank      
Reconciliation of changes in goodwill [abstract]      
Goodwill, balance, period start   0 0
Goodwill acquired during the year   0 0
Purchase accounting adjustments   0 0
Transfers   0 0
Reclassification from (to) “held for sale”   0 0
Goodwill related to dispositions without being classified as “held for sale”   0 0
Impairment losses [1]   0 0
Exchange rate changes/other   0 0
Goodwill, balance, period end 0 0 0
Gross amount of goodwill   3,967 4,418
Accumulated impairment losses   (3,967) (4,418)
Private Bank      
Reconciliation of changes in goodwill [abstract]      
Goodwill, balance, period start   0 0
Goodwill acquired during the year   0 0
Purchase accounting adjustments   0 0
Transfers   0 0
Reclassification from (to) “held for sale”   0 0
Goodwill related to dispositions without being classified as “held for sale”   0 0
Impairment losses [1]   0 0
Exchange rate changes/other   0 0
Goodwill, balance, period end 0 0 0
Gross amount of goodwill   3,717 3,737
Accumulated impairment losses   (3,717) (3,737)
Asset Management      
Reconciliation of changes in goodwill [abstract]      
Goodwill, balance, period start   2,963 2,849
Goodwill acquired during the year   0 0
Purchase accounting adjustments   0 0
Transfers   0 0
Reclassification from (to) “held for sale”   0 0
Goodwill related to dispositions without being classified as “held for sale”   0 0
Impairment losses [1]   0 0
Exchange rate changes/other   (227) 114
Goodwill, balance, period end € 2,849 2,735 2,963
Gross amount of goodwill   3,208 3,477
Accumulated impairment losses   € (473) € (515)
[1] 1Impairment losses of goodwill are recorded as impairment of goodwill and other intangible assets in the income statement