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Leases - Summary of Consolidated Statement Of Earnings (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Mar. 25, 2023	Mar. 26, 2022	Mar. 27, 2021
Variable Rent Expense [Member]
Summary Of Consolidated Statement Of Earnings [Line Items]
Rent concessions recognized amount	$ 0.2	$ 1.5	$ 4.1

X

- Definition

Rent concessions recognized amount.

+ References

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X

- Definition

Summary of consolidated statement of earnings.

+ References

No definition available.

+ Details

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Namespace Prefix:	bgi_
Data Type:	xbrli:stringItemType
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Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: