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Concentrations of Risk (Schedule of Accounts Receivable from Customers in Percent) (Details)	12 Months Ended
	Jun. 25, 2017
Credit Concentration Risk [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Customers meeting concentration risk criteria	0

X

- Definition

Customers meeting concentration risk criteria

+ References

No definition available.

+ Details

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Namespace Prefix:	cree_
Data Type:	xbrli:integerItemType
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_ConcentrationRiskLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CreditConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_AccountsReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: