XML 91 R78.htm IDEA: XBRL DOCUMENT
v3.10.0.1

SUBSEQUENT EVENTS - Narrative (Details) - Interest rate swap - derivative | Nov. 30, 2018 | Nov. 16, 2018 | Oct. 26, 2018 | Jun. 24, 2016 | Jan. 23, 2015
--- | --- | --- | --- | --- | ---
Subsequent Event [Line Items] |  |  |  |  |
Derivative, Number of Instruments Entered |  |  | 4 | 4 | 2
Subsequent Event |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Derivative, Number of Instruments Entered | 3 | 3 |  |  |

X
- Definition Derivative, Number Of Instruments Entered + References No definition available. + Details
Name: | unfi_DerivativeNumberOfInstrumentsEntered
Namespace Prefix: | unfi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |