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Revenues, Deferred Revenues and Segments (Details) | 12 Months Ended
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Dec. 31, 2025 EUR (€) Segment
Revenues, Deferred Revenues and Segments [Line Items] |
Number of operating segments (in Segment) | Segment | 2
No customer [Member] |
Revenues, Deferred Revenues and Segments [Line Items] |
Total revenue | 10.00%
Maximum [Member] | Customer One [Member] |
Revenues, Deferred Revenues and Segments [Line Items] |
Total revenue | 25.00%
Minimum [Member] | Customer Two [Member] |
Revenues, Deferred Revenues and Segments [Line Items] |
Total revenue | 21.00%
Digital Assets Treasury Portfolio [Member] |
Revenues, Deferred Revenues and Segments [Line Items] |
Revenue (in Euro) | € 1,128
Legacy Sports Portfolio [Member] |
Revenues, Deferred Revenues and Segments [Line Items] |
Revenue (in Euro) | € 936

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- Definition The number of operating segments. + References No definition available. + Details
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Period Type: | duration

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- Definition Represents the amount of revenue form concentration risk customers. + References No definition available. + Details
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Namespace Prefix: | brer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | brer_
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- References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 34 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_34&doctype=Standard -URIDate 2025-03-27 + Details
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- Details
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Namespace Prefix: |
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- Details
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- Details
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- Details
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Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |