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Reportable Segments (Schedule of Percentage of Revenues from Customers by Country) (Details)	12 Months Ended
	Jun. 24, 2012	Jun. 26, 2011	Jun. 27, 2010
Statement [Line Items]
Revenues from External Customers	100.00%	100.00%	100.00%
China
Statement [Line Items]
Revenues from External Customers	32.00%	36.00%	40.00%
United States
Statement [Line Items]
Revenues from External Customers	38.00%	24.00%	19.00%
Europe
Statement [Line Items]
Revenues from External Customers	14.00%	14.00%	13.00%
South Korea
Statement [Line Items]
Revenues from External Customers	2.00%	4.00%	10.00%
Japan
Statement [Line Items]
Revenues from External Customers	8.00%	7.00%	9.00%
Malaysia
Statement [Line Items]
Revenues from External Customers	2.00%	2.00%	2.00%
Taiwan
Statement [Line Items]
Revenues from External Customers	1.00%	5.00%	4.00%
Other
Statement [Line Items]
Revenues from External Customers	3.00%	8.00%	3.00%

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.

+ References

No definition available.

+ Details

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

X

- Details

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