Risk Report - Asset Quality - Modified Assets (Detail: Text Value) € in Millions	Dec. 31, 2025 EUR (€)
Asset Quality [Abstract]
Increase (decrease) in modified assets at amortized cost due to client related modifications	€ (291)

Increase (decrease) in modified assets at amortized cost due to client related modifications

No definition available.

Name:	db_IncreaseDecreaseInModifiedAssetsAtAmortizedCostDueToClientRelatedModifications
Namespace Prefix:	db_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant