XML 35 R111.htm IDEA: XBRL DOCUMENT
v3.19.3

COMMITMENTS, CONTINGENCIES AND OFF-BALANCE SHEET ARRANGEMENTS (Details) $ in Millions | 12 Months Ended
--- | ---
Aug. 03, 2019 USD ($) case lawsuit retailer
Loss Contingencies [Line Items] |
Purchase obligation | $ 260.0
Number of retailers filing similar complaints in other jurisdictions | retailer | 3
Schutte and Yarberry v. Supervalu, New Albertson's, Inc., et al |
Loss Contingencies [Line Items] |
Alleged damages (in excess of) | $ 100.0
Share of potential award | 24.0
Payment Guarantee |
Loss Contingencies [Line Items] |
Guarantor obligations, maximum exposure, undiscounted | 36.9
Guarantor obligations, maximum exposure, discounted | $ 26.0
Payment Guarantee | Minimum |
Loss Contingencies [Line Items] |
Guarantor obligations, guarantees term | 1 year
Payment Guarantee | Maximum |
Loss Contingencies [Line Items] |
Guarantor obligations, guarantees term | 11 years
Payment Guarantee | Weighted Average |
Loss Contingencies [Line Items] |
Guarantor obligations, guarantees term | 7 years
Moran Foods, LLC |
Loss Contingencies [Line Items] |
Professional services agreement term | 5 years
Professional services agreement, base amount | $ 30.0
Advantage Logistics | National Opioid Epidemic |
Loss Contingencies [Line Items] |
Number of suits pending | lawsuit | 28
Number of cases consolidated | case | 1,800
New Albertson's Inc. | National Opioid Epidemic |
Loss Contingencies [Line Items] |
Number of suits pending | case | 19

X
- Definition Guarantor Obligations, Guarantees Term + References No definition available. + Details
Name: | unfi_GuarantorObligationsGuaranteesTerm
Namespace Prefix: | unfi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Guarantor Obligations, Maximum Exposure, Discounted + References No definition available. + Details
Name: | unfi_GuarantorObligationsMaximumExposureDiscounted
Namespace Prefix: | unfi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Loss Contingency, Cases Consolidated, Number + References No definition available. + Details
Name: | unfi_LossContingencyCasesConsolidatedNumber
Namespace Prefix: | unfi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Loss Contingency, Number of Retailers Filing Similar Complaints + References No definition available. + Details
Name: | unfi_LossContingencyNumberofRetailersFilingSimilarComplaints
Namespace Prefix: | unfi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loss Contingency, Share of Potential Award, Value + References No definition available. + Details
Name: | unfi_LossContingencyShareofPotentialAwardValue
Namespace Prefix: | unfi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Professional Services Agreement, Base Amount + References No definition available. + Details
Name: | unfi_ProfessionalServicesAgreementBaseAmount
Namespace Prefix: | unfi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Professional Services Agreement Term + References No definition available. + Details
Name: | unfi_ProfessionalServicesAgreementTerm
Namespace Prefix: | unfi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=118943654&loc=d3e12069-110248 + Details
Name: | us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14557-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14435-108349 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyDamagesSoughtValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of pending claims pertaining to a loss contingency. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14435-108349 + Details
Name: | us-gaap_LossContingencyPendingClaimsNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier. + References No definition available. + Details
Name: | us-gaap_PurchaseObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | srt_LitigationCaseAxis=unfi_SchutteandYarberryv.SuperValuNewAlbertsonsInc.etalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_GuaranteeObligationsByNatureAxis=us-gaap_PaymentGuaranteeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_WeightedAverageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=unfi_MoranFoodsLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=unfi_AdvantageLogisticsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=unfi_NationalOpioidEpidemicMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=unfi_NewAlbertsonsInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |