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Financial Assets at Fair Value Through Profit or Loss (Details) - Schedule of Financial Assets - EUR (€) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2023 | Dec. 31, 2022
Current Assets |  |
US listed equity securities | € 123,670 |

X
- Definition US listed equity securities. + References No definition available. + Details
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Namespace Prefix: | brer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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