Amount of accumulated impairment of assets held-for-sale that are not part of a disposal group.

No definition available.

Name:	bgs_AssetHeldForSaleNotPartOfDisposalGroupAccumulatedImpairment
Namespace Prefix:	bgs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of assets held-for-sale that are not part of a disposal group, before deducting accumulated impairment.

+ References

No definition available.

+ Details

Name:	bgs_AssetHeldForSaleNotPartOfDisposalGroupBeforeAccumulatedImpairment
Namespace Prefix:	bgs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of finite-lived intangible assets classified as assets held-for-sale that are not part of a disposal group.

+ References

No definition available.

+ Details

Name:	bgs_AssetHeldForSaleNotPartOfDisposalGroupFiniteLivedIntangibleAssets
Namespace Prefix:	bgs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Increase (decrease) in inventory classified as assets held-for-sale that are not part of a disposal group.

+ References

No definition available.

+ Details

Name:	bgs_AssetHeldForSaleNotPartOfDisposalGroupIncreaseDecreaseInInventory
Namespace Prefix:	bgs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of indefinite-lived intangible assets classified as assets held-for-sale that are not part of a disposal group.

+ References

No definition available.

+ Details

Name:	bgs_AssetHeldForSaleNotPartOfDisposalGroupIndefiniteLivedIntangibleAssets
Namespace Prefix:	bgs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of inventory classified as assets held-for-sale that are not part of a disposal group.

+ References

No definition available.

+ Details

Name:	bgs_AssetHeldForSaleNotPartOfDisposalGroupInventory
Namespace Prefix:	bgs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of loss from reductions in inventory classified as held-for-sale due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.

+ References

No definition available.

+ Details

Name:	bgs_AssetHeldForSaleNotPartOfDisposalGroupInventoryWriteDown
Namespace Prefix:	bgs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of purchase price on sale of assets held for sale.

+ References

No definition available.

+ Details

Name:	bgs_AssetsHeldForSalePurchasePrice
Namespace Prefix:	bgs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of adjustment to the consideration received or receivable for the disposal of assets and liabilities.

+ References

No definition available.

+ Details

Name:	bgs_DisposalGroupConsiderationAdjustmentAmount
Namespace Prefix:	bgs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of assets held-for-sale that are not part of a disposal group.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 15
-Paragraph 4
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482309/360-10-15-4

+ Details

Name:	us-gaap_AssetsHeldForSaleNotPartOfDisposalGroup
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_LongLivedAssetsHeldForSaleLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=bgs_GreenGiantCanadaAndLeSieurMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupHeldforsaleNotDiscontinuedOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TrademarksMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Assets Held for Sale (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Assets Held for Sale (Details) - USD ($) $ in Thousands	Jan. 03, 2026	Jan. 03, 2026	Oct. 24, 2025	Sep. 27, 2025
Assets Held for Sale
Inventories	$ 70,427	$ 70,427		$ 75,600
Indefinite-lived intangible assets - Trademarks	6,292	6,292
Finite-lived intangible assets - Customer relationships	3,124	3,124
Assets held for sale before impairments	79,843	79,843
Impairments of assets held for sale	(28,500)	(28,500)		(27,800)
Assets held for sale	51,343	51,343
Decrease in value of inventory	(5,200)
Additional pre-tax, non-cash impairment charges	700	700
Green Giant Canada and Le Sieur
Assets Held for Sale
Indefinite-lived intangible assets - Trademarks	6,300	6,300
Finite-lived intangible assets - Customer relationships	$ 3,100	$ 3,100
Disposal Group held-for-sale - Not discontinued operations \| Green Giant Canada and Le Sieur
Assets Held for Sale
Adjustment amount			$ 5,000
Assets held for sale, purchase price			$ 60,000
Customer relationships
Assets Held for Sale
Finite-lived intangible assets - Customer relationships				3,100
Trademarks
Assets Held for Sale
Indefinite-lived intangible assets - Trademarks				$ 6,300