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Term Deposits (Details) - EUR (€) € in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Term Deposits |  |
Short-term deposits in banks | € 991 | € 62,418
Term deposits | € 991 | € 62,418

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- Definition The amount of short-term deposits held by the entity that are not classified as cash equivalents. [Refer: Cash equivalents] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_ShorttermDepositsNotClassifiedAsCashEquivalents
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition n/a + References No definition available. + Details
Name: | jmia_DepositAssetAbstract
Namespace Prefix: | jmia_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of short-term deposits held in banks that are not classified as cash equivalents. + References No definition available. + Details
Name: | jmia_ShortTermDepositsInBanks
Namespace Prefix: | jmia_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant