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Cash and Cash Equivalents (Details) - Schedule of Cash and Cash Equivalents - EUR (€) | Jun. 30, 2023 | Dec. 31, 2022
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Schedule Of Cash And Cash Equivalents [Abstract] |  |
Cash at bank | € 4,422,045 | € 347,229
Deposits at call | 197,016 |
Cash at bank | € 4,619,061 | € 347,229

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- Definition Cash at Bank means all or any deposits, credit balances and other sums with any financial institution and the accounts in respect of the same. + References No definition available. + Details
Name: | brer_CashAtBank
Namespace Prefix: | brer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount of deposits at call. + References No definition available. + Details
Name: | brer_DepositsAtCall
Namespace Prefix: | brer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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- Definition The amount of cash held by the entity. This does not include demand deposits. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2023-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_CashOnHand
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant