XML 58 R45.htm IDEA: XBRL DOCUMENT
v3.10.0.1

ACQUISITIONS - Schedule of Finite-Lived Intangible Assets Acquired (Details) - SUPERVALU [Member] $ in Thousands | Oct. 22, 2018 USD ($)
--- | ---
Business Acquisition [Line Items] |
Finite Lived Intangible Assets | $ 1,166,532
Customer Relationships [Member] |
Business Acquisition [Line Items] |
Finite Lived Intangible Assets | 985,000
Above Market Leases [Member] |
Business Acquisition [Line Items] |
Finite Lived Intangible Assets | 24,455
Trade Names [Member] |
Business Acquisition [Line Items] |
Finite Lived Intangible Assets | 98,000
Database Rights [Member] |
Business Acquisition [Line Items] |
Finite Lived Intangible Assets | 59,700
Noncompete Agreements [Member] |
Business Acquisition [Line Items] |
Finite Lived Intangible Assets | $ 13,000
Finite-Lived Intangible Asset, Useful Life | 2 years
Below Market Leases [Member] |
Business Acquisition [Line Items] |
Finite Lived Intangible Assets | $ 13,623
Finite-Lived Intangible Asset, Useful Life | 2 years
Minimum | Customer Relationships [Member] |
Business Acquisition [Line Items] |
Finite-Lived Intangible Asset, Useful Life | 11 years
Minimum | Above Market Leases [Member] |
Business Acquisition [Line Items] |
Finite-Lived Intangible Asset, Useful Life | 3 years
Minimum | Trade Names [Member] |
Business Acquisition [Line Items] |
Finite-Lived Intangible Asset, Useful Life | 2 years
Minimum | Database Rights [Member] |
Business Acquisition [Line Items] |
Finite-Lived Intangible Asset, Useful Life | 5 years
Maximum | Customer Relationships [Member] |
Business Acquisition [Line Items] |
Finite-Lived Intangible Asset, Useful Life | 19 years
Maximum | Above Market Leases [Member] |
Business Acquisition [Line Items] |
Finite-Lived Intangible Asset, Useful Life | 23 years
Maximum | Trade Names [Member] |
Business Acquisition [Line Items] |
Finite-Lived Intangible Asset, Useful Life | 9 years
Maximum | Database Rights [Member] |
Business Acquisition [Line Items] |
Finite-Lived Intangible Asset, Useful Life | 7 years

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

X
- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=84160947&loc=d3e2207-128464 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=unfi_SUPERVALUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_AboveMarketLeasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_DatabasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_NoncompeteAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=unfi_BelowMarketLeasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |