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Accounts Receivable and Other Receivables - Additional Information (Detail) - Non Accrual [Member] - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Mar. 29, 2025 | Mar. 30, 2024
Accounts Receivables [Line Items] |  |
Payment period of term loan | revolving lines of credit and/or installment plans under which the payment terms exceed one year |
Credit card receivables | $ 1.1 | $ 1.6

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- Definition Accounts Receivable Payment Terms + References No definition available. + Details
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Namespace Prefix: | bgi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Accounts Receivables [Line Items] + References No definition available. + Details
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Namespace Prefix: | bgi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amortized cost excluding accrued interest, after allowance for credit loss, of financing receivable classified as noncurrent. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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