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v3.22.2.2

REVENUE RECOGNITION - Narrative (Details) $ in Millions | 1 Months Ended |
--- | --- | ---
Dec. 07, 2022 USD ($) | Oct. 29, 2022 store channel
Disaggregation of Revenue [Line Items] |  |
Number of customer channels | channel |  | 5
Subsequent event |  |
Disaggregation of Revenue [Line Items] |  |
Authorized amount of accounts receivable to be sold | $ 300 |
Accounts receivable sold | $ 253 |
Chains |  |
Disaggregation of Revenue [Line Items] |  |
Number of stores | store |  | 10

X
- Definition Accounts Receivable, Sale, Authorized Amount + References No definition available. + Details
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Namespace Prefix: | unfi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number Of Customer Channels + References No definition available. + Details
Name: | unfi_NumberOfCustomerChannels
Namespace Prefix: | unfi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of decrease from sale of accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 11 -Subparagraph (i) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919244-210447 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition Represents the number of stores. + References No definition available. + Details
Name: | us-gaap_NumberOfStores
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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

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- Details
Name: | us-gaap_ContractWithCustomerSalesChannelAxis=unfi_ChainsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |