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v3.25.1

Summary of Significant Accounting Policies - Fiscal Year (Details) | 3 Months Ended
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Mar. 29, 2025
Fiscal Year |
Number of weeks in fiscal period | 364 days
Number of weeks in each fiscal quarter | 91 days
Number of weeks in fourth quarter of fiscal year having fifty three weeks | 98 days
Minimum |
Fiscal Year |
Number of years between 53 week fiscal years | 5 years
Maximum |
Fiscal Year |
Number of years between 53 week fiscal years | 6 years

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

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- Definition Represents the frequency of a fiscal year containing 53 weeks rather than the regular 52 week fiscal year. + References No definition available. + Details
Name: | bgs_FrequencyOf53WeekFiscalYear
Namespace Prefix: | bgs_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Disclosure of the number of weeks included in the financial results of each fiscal year quarter. + References No definition available. + Details
Name: | bgs_NumberOfWeeksInFiscalQuarter
Namespace Prefix: | bgs_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Disclosure of the number of weeks included in the financial results of fourth fiscal quarter of fiscal year having 53 week. + References No definition available. + Details
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Namespace Prefix: | bgs_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Duration of a fiscal period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

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