Reportable Segments (Revenues, Gross Profit and Gross Margin, by Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Dec. 28, 2014	Dec. 29, 2013	Dec. 28, 2014	Dec. 29, 2013
Segment Reporting Information [Line Items]
Revenue, net	$ 413,157us-gaap_SalesRevenueGoodsNet	$ 415,086us-gaap_SalesRevenueGoodsNet	$ 840,829us-gaap_SalesRevenueGoodsNet	$ 806,092us-gaap_SalesRevenueGoodsNet
Gross profit	136,779us-gaap_GrossProfit	155,778us-gaap_GrossProfit	272,599us-gaap_GrossProfit	306,535us-gaap_GrossProfit
Gross Margin	33.10%cree_GrossProfitPercent	37.50%cree_GrossProfitPercent	32.40%cree_GrossProfitPercent	38.00%cree_GrossProfitPercent
LED Products [Member]
Segment Reporting Information [Line Items]
Revenue, net	151,877	215,022	325,467	433,045
Gross profit	59,424	97,644	127,048	199,297
Gross Margin	39.10%	45.40%	39.00%	46.00%
Lighting Products [Member]
Segment Reporting Information [Line Items]
Revenue, net	230,168	173,656	453,254	321,574
Gross profit	64,701	48,426	120,293	88,244
Gross Margin	28.10%	27.90%	26.50%	27.40%
Power and RF Products [Member]
Segment Reporting Information [Line Items]
Revenue, net	31,112	26,408	62,108	51,473
Gross profit	17,260	15,321	35,117	28,777
Gross Margin	55.50%	58.00%	56.50%	55.90%
Total segment gross profit [Member]
Segment Reporting Information [Line Items]
Gross profit	141,385	161,391	282,458	316,318
Unallocated Costs [Member]
Segment Reporting Information [Line Items]
Gross profit	$ (4,606)	$ (5,613)	$ (9,859)	$ (9,783)

Gross profit (aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity), as percent of revenue.

No definition available.

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- Definition

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

+ References

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- Definition

Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(a))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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