XML 60 R42.htm IDEA: XBRL DOCUMENT v3.10.0.1

SIGNIFICANT ACCOUNTING POLICIES (Details 7)	12 Months Ended
	Jul. 28, 2018 Plan
Equity plans
Number of employee compensation plans (in plans)	4
Stock options
Equity plans
Portion of share-based awards with immediate vesting for Board of Directors	50.00%
Restricted stock awards and units
Equity plans
Graded vesting period for employees	4 years
Vesting period for Board of Directors (in years)	6 months
Portion of share-based awards with immediate vesting for Board of Directors	50.00%

X

- Definition

Represents the number of share-based employee compensation plans.

+ References

No definition available.

+ Details

Name:	unfi_ShareBasedCompensationNumberOfEmployeeCompensationPlans
Namespace Prefix:	unfi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Description of the period of time over which a non-employee director's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, which may be expressed in a variety of ways (for example, in years, month and year).

+ References

No definition available.

+ Details

Name:	unfi_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingPeriodforNonemployees
Namespace Prefix:	unfi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the portion of awards granted to nonemployee directors that vests immediately.

+ References

No definition available.

+ Details

Name:	unfi_SharebasedCompensationArrangementbySharebasedPaymentAwardPortionofAwardVestingImmediatelyforNonemployees
Namespace Prefix:	unfi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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

X

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=unfi_RestrictedStockAndRestrictedStockUnitAwardsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: