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Derivative Instruments and Hedging Activities (Details) (USD $)	3 Months Ended	9 Months Ended
	Mar. 31, 2013	Mar. 31, 2013	Jun. 24, 2012
Derivative [Line Items]
Derivative, Weighted Average Notional Amount	$ 102,000	$ 33,000
Notional Amount of Foreign Currency Derivative Purchase Contracts	$ 0	$ 0	$ 0

X

- Definition

A measure designed to show level of activity in derivative instruments during the reporting period: the weighted average value of derivative contracts outstanding during the reporting period calculated as the notional amount of all contracts outstanding during the period multiplied by the number of days outstanding during the period and divided by the number of days in the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	cree_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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

X

- Definition

Aggregate notional amount of foreign currency derivatives to purchase a foreign currency. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant