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Deferred revenue (Details) - Schedule of deferred revenue in accordance - EUR (€) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Schedule of deferred revenue in accordance [Abstract] |  |
Deferred revenue – outside parties | € 224,248 | € 29,371

X
- Definition Amount of deferred revenue – outside parties. + References No definition available. + Details
Name: | brer_DeferredRevenueOutsideParties
Namespace Prefix: | brer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | brer_DeferredrevenueDetailsScheduleofdeferredrevenueinaccordanceLineItems
Namespace Prefix: | brer_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration