XML 54 R36.htm IDEA: XBRL DOCUMENT
v3.10.0.1

SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 28, 2018 | Jul. 28, 2018 | Jul. 29, 2017 | Jul. 30, 2016
Basis of Presentation |  |  |  |
Days in fiscal year |  | 364 days | 364 days | 364 days
Days in interim quarter |  | 91 days | 91 days | 91 days
Cash Equivalents |  |  |  |
Maximum original maturity of securities to be classified as cash equivalents (in months) |  | 3 months |  |
Use of Estimates |  |  |  |
Increase (Decrease) in Accounts Payable | $ 20,900 | $ 4,395 | $ 90,217 | $ 14,379
Change in Accounting Estimate, Effect of Change on Net Income | $ 13,900 |  |  |
Change in Accounting Estimate, Effect of Change on Diluted Earnings Per Share | $ 0.27 |  |  |
Property and equipment |  |  |  |
Interest capitalized |  | 0 |  | 400
Property and equipment |  |  |  |
Property and equipment, gross |  | 1,059,329 | 1,027,845 |
Less accumulated depreciation and amortization |  | 488,183 | 425,755 |
Net property and equipment |  | 571,146 | 602,090 |
Depreciation expense |  | 71,500 | 69,800 | $ 61,100
Land |  |  |  |
Property and equipment |  |  |  |
Property and equipment, gross |  | 52,929 | 52,989 |
Buildings and improvements |  |  |  |
Property and equipment |  |  |  |
Property and equipment, gross |  | 446,665 | 396,733 |
Leasehold improvements |  |  |  |
Property and equipment |  |  |  |
Property and equipment, gross |  | 106,014 | 138,466 |
Warehouse equipment |  |  |  |
Property and equipment |  |  |  |
Property and equipment, gross |  | 185,669 | 173,591 |
Office equipment |  |  |  |
Property and equipment |  |  |  |
Property and equipment, gross |  | 85,734 | 95,794 |
Computer software |  |  |  |
Property and equipment |  |  |  |
Property and equipment, gross |  | 155,329 | 147,647 |
Motor vehicles |  |  |  |
Property and equipment |  |  |  |
Property and equipment, gross |  | 4,884 | 4,657 |
Construction in progress |  |  |  |
Property and equipment |  |  |  |
Property and equipment, gross |  | $ 22,105 | $ 17,968 |
Minimum | Buildings and improvements |  |  |  |
Property and equipment |  |  |  |
Original estimated useful lives |  | 20 years | 20 years |
Minimum | Leasehold improvements |  |  |  |
Property and equipment |  |  |  |
Original estimated useful lives |  | 5 years | 5 years |
Minimum | Warehouse equipment |  |  |  |
Property and equipment |  |  |  |
Original estimated useful lives |  | 3 years | 3 years |
Minimum | Office equipment |  |  |  |
Property and equipment |  |  |  |
Original estimated useful lives |  | 3 years | 3 years |
Minimum | Computer software |  |  |  |
Property and equipment |  |  |  |
Original estimated useful lives |  | 3 years | 3 years |
Minimum | Motor vehicles |  |  |  |
Property and equipment |  |  |  |
Original estimated useful lives |  | 3 years | 3 years |
Maximum | Buildings and improvements |  |  |  |
Property and equipment |  |  |  |
Original estimated useful lives |  | 40 years | 40 years |
Maximum | Leasehold improvements |  |  |  |
Property and equipment |  |  |  |
Original estimated useful lives |  | 20 years | 20 years |
Maximum | Warehouse equipment |  |  |  |
Property and equipment |  |  |  |
Original estimated useful lives |  | 30 years | 30 years |
Maximum | Office equipment |  |  |  |
Property and equipment |  |  |  |
Original estimated useful lives |  | 10 years | 10 years |
Maximum | Computer software |  |  |  |
Property and equipment |  |  |  |
Original estimated useful lives |  | 7 years | 7 years |
Maximum | Motor vehicles |  |  |  |
Property and equipment |  |  |  |
Original estimated useful lives |  | 7 years | 7 years |

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | unfi_BasisOfPresentationAbstract
Namespace Prefix: | unfi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | unfi_CashEquivalentsAbstract
Namespace Prefix: | unfi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Change in Accounting Estimate, Effect of Change on Diluted Earnings Per Share + References No definition available. + Details
Name: | unfi_ChangeinAccountingEstimateEffectofChangeonDilutedEarningsPerShare
Namespace Prefix: | unfi_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Change in Accounting Estimate, Effect of Change on Net Income + References No definition available. + Details
Name: | unfi_ChangeinAccountingEstimateEffectofChangeonNetIncome
Namespace Prefix: | unfi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Days in Interim Quarter + References No definition available. + Details
Name: | unfi_DaysinInterimQuarter
Namespace Prefix: | unfi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the maximum original maturity period of securities to be classified as cash equivalents. + References No definition available. + Details
Name: | unfi_MaximumPeriodofSecuritiestobeClassifiedasCashEquivalents
Namespace Prefix: | unfi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Days in Fiscal Year + References No definition available. + Details
Name: | unfi_NumberofDaysinFiscalYear
Namespace Prefix: | unfi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | unfi_PropertyAndEquipmentAbstract
Namespace Prefix: | unfi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Use of Estimates + References No definition available. + Details
Name: | unfi_UseofEstimatesAbstract
Namespace Prefix: | unfi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
Name: | us-gaap_Depreciation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
Name: | us-gaap_IncreaseDecreaseInAccountsPayable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of interest capitalized, including amount of allowance for funds used during construction. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 835 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501662&loc=d3e56162-110433 + Details
Name: | us-gaap_InterestCostsIncurredCapitalized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_PropertyPlantAndEquipmentGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(14)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
Name: | us-gaap_PropertyPlantAndEquipmentNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingAndBuildingImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LeaseholdImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_EquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_OfficeEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ComputerSoftwareIntangibleAssetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_VehiclesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ConstructionInProgressMember
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: |