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Geographic Information (Schedule of Percentage of Revenues from Customers by Country) (Details)	12 Months Ended
	Jun. 26, 2011	Jun. 27, 2010	Jun. 28, 2009
Revenues from External Customers	100.00%	100.00%	100.00%
China [Member]
Revenues from External Customers	36.00%	40.00%	38.00%
United States [Member]
Revenues from External Customers	24.00%	19.00%	20.00%
Europe [Member]
Revenues from External Customers	14.00%	13.00%	10.00%
South Korea [Member]
Revenues from External Customers	4.00%	10.00%	15.00%
Japan [Member]
Revenues from External Customers	7.00%	9.00%	9.00%
Malaysia [Member]
Revenues from External Customers	2.00%	2.00%	3.00%
Taiwan [Member]
Revenues from External Customers	5.00%	4.00%	3.00%
Other [Member]
Revenues from External Customers	8.00%	3.00%	2.00%

X

- Definition

Percent of revenue from external customers recognized during the period (derived from goods sold, services rendered, or other activities that constitute an entity's earning process.

+ Details

Name:	cree_PercentageOfRevenuesFromExternalCustomers
Namespace Prefix:	cree
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration