Summary of significant accounting policies - Consolidation (Details) - subsidiary	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Summary of significant accounting policies
Number of subsidiaries consolidated	66	66	71

Represents the number of subsidiaries consolidated.

No definition available.

Name:	jmia_NumberOfSubsidiariesConsolidated
Namespace Prefix:	jmia_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration