Name:	ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The amount of expense from share-based payment transactions with employees.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2019-03-27

Name:	ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The nominal value per share.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 79
-Subparagraph a
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_79_a_iii&doctype=Standard
-URIDate 2019-03-27

Name:	ifrs-full_ParValuePerShare
Namespace Prefix:	ifrs-full_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

The period of vesting of first tranche under share based compensation arrangement by share based payment award.

No definition available.

Name:	jmia_PeriodOfVestingOfFirstTrancheUnderShareBasedCompensationArrangementByShareBasedPaymentAward
Namespace Prefix:	jmia_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The period of vesting of the second tranche under the share based compensation plan.

No definition available.

Name:	jmia_PeriodOfVestingOfSecondTrancheUnderShareBasedCompensationArrangementByShareBasedPaymentAward
Namespace Prefix:	jmia_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The number of the entity's American Depositary Shares to be received for each option granted under the share-based compensation plan. Two of the entity's American Depositary Shares represent one share of Jumia.

No definition available.

Name:	jmia_ShareBasedCompensationPlanNumberOfAmericanDepositarySharesCalledByEachOption
Namespace Prefix:	jmia_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The number of shares of the entity's stock to be received for each option granted under the share-based compensation plan.

No definition available.

Name:	jmia_ShareBasedCompensationPlanNumberOfSharesCalledByEachOption
Namespace Prefix:	jmia_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The number of trading days considered when setting the exercise price of the share-based compensation award.

No definition available.

Name:	jmia_ShareBasedCompensationPlanNumberOfTradingsDaysConsideredForExercisePrice
Namespace Prefix:	jmia_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The length of the period, after expiration of the waiting period, during which recipients can exercise options received under the share based compensation plan.

No definition available.

Name:	jmia_ShareBasedCompensationPlanOptionsExercisePeriod
Namespace Prefix:	jmia_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The minimum annual growth in sales volume necessary in order to exercise options granted under the share-based compensation plan.

No definition available.

Name:	jmia_ShareBasedCompensationPlanOptionsMinimumAnnualGrowthInSalesVolumeForExercise
Namespace Prefix:	jmia_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The number of vesting tranches for options granted under the share-based compensation plan.

No definition available.

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

The percentage of options that vest in the first tranche.

No definition available.

Name:	jmia_ShareBasedCompensationPlanOptionsPercentageThatVestsInTrancheOne
Namespace Prefix:	jmia_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The percentage of options that vest in the second tranche.

No definition available.

Name:	jmia_ShareBasedCompensationPlanOptionsPercentageThatVestsInTrancheTwo
Namespace Prefix:	jmia_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The period during which former management beneficiaries incept work for a competitor of the entity which triggers forfeiture of unexercised options granted under the share-based compensation plan.

No definition available.

Name:	jmia_ShareBasedCompensationPlanOptionsPeriodTriggeringForfeiture
Namespace Prefix:	jmia_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The number of consecutive quarters of positive Adjusted EBITDA that must occur by the specified date in order for part of the stock options granted to Functional Leaders to vest.

No definition available.

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

The waiting period that must expire before options granted under the share-based compensation plan can be exercised.

No definition available.