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Reportable Segments Schedule of Inventory by Reportable Segment (Details) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2015	Jun. 29, 2014
Segment Reporting Information [Line Items]
Inventories	$ 299,360us-gaap_InventoryNet	$ 284,780us-gaap_InventoryNet
LED Products [Member]
Segment Reporting Information [Line Items]
Inventories	128,061us-gaap_InventoryNet / us-gaap_StatementBusinessSegmentsAxis = cree_LedProductsMember	123,249us-gaap_InventoryNet / us-gaap_StatementBusinessSegmentsAxis = cree_LedProductsMember
Lighting Products [Member]
Segment Reporting Information [Line Items]
Inventories	155,294us-gaap_InventoryNet / us-gaap_StatementBusinessSegmentsAxis = cree_ProductLightingMember	148,757us-gaap_InventoryNet / us-gaap_StatementBusinessSegmentsAxis = cree_ProductLightingMember
Power and RF Products [Member]
Segment Reporting Information [Line Items]
Inventories	11,306us-gaap_InventoryNet / us-gaap_StatementBusinessSegmentsAxis = cree_PowerandRFProductsMember	8,019us-gaap_InventoryNet / us-gaap_StatementBusinessSegmentsAxis = cree_PowerandRFProductsMember
Total segment inventories [Member]
Segment Reporting Information [Line Items]
Inventories	294,661us-gaap_InventoryNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_OperatingSegmentsMember	280,025us-gaap_InventoryNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_OperatingSegmentsMember
Unallocated inventories [Member]
Segment Reporting Information [Line Items]
Inventories	$ 4,699us-gaap_InventoryNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_MaterialReconcilingItemsMember	$ 4,755us-gaap_InventoryNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_MaterialReconcilingItemsMember

X

- Definition

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

+ 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 210.5-02.6(a))

-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 330

-SubTopic 10

-Section 35

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6386567&loc=d3e3927-108312



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765

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- Details

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- Details

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- Details

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