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Intangible Assets (Components of intangible assets, net) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 28, 2014
Jun. 29, 2014
Intangible Assets [Line Items]    
Finite-lived intangible assets, gross $ 454,306us-gaap_FiniteLivedIntangibleAssetsGross $ 445,571us-gaap_FiniteLivedIntangibleAssetsGross
Finite-lived intangible assets, accumulated amortization (206,261)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization (188,828)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Finite-lived intangible assets, net 248,045us-gaap_FiniteLivedIntangibleAssetsNet 256,743us-gaap_FiniteLivedIntangibleAssetsNet
Trade names, indefinite-lived 79,680us-gaap_IndefiniteLivedTradeNames 79,680us-gaap_IndefiniteLivedTradeNames
Intangible Assets, Gross (Excluding Goodwill) 533,986us-gaap_IntangibleAssetsGrossExcludingGoodwill 525,251us-gaap_IntangibleAssetsGrossExcludingGoodwill
Intangible assets, net 327,725us-gaap_IntangibleAssetsNetExcludingGoodwill 336,423us-gaap_IntangibleAssetsNetExcludingGoodwill
Customer Relationships [Member]    
Intangible Assets [Line Items]    
Finite-lived intangible assets, gross 137,440us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
137,440us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
Finite-lived intangible assets, accumulated amortization (69,659)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
(66,970)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
Finite-lived intangible assets, net 67,781us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
70,470us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
Developed Technology [Member]    
Intangible Assets [Line Items]    
Finite-lived intangible assets, gross 162,760us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember
162,760us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember
Finite-lived intangible assets, accumulated amortization (82,242)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember
(72,921)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember
Finite-lived intangible assets, net 80,518us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember
89,839us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember
Non-compete Agreements [Member]    
Intangible Assets [Line Items]    
Finite-lived intangible assets, gross 10,244us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
10,244us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
Finite-lived intangible assets, accumulated amortization (6,977)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
(5,997)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
Finite-lived intangible assets, net 3,267us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
4,247us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
Trade Names, finite-lived [Member]    
Intangible Assets [Line Items]    
Finite-lived intangible assets, gross 520us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
520us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
Finite-lived intangible assets, accumulated amortization (520)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
(516)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
Finite-lived intangible assets, net 0us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
4us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
Patent and Licensing Rights [Member]    
Intangible Assets [Line Items]    
Finite-lived intangible assets, gross 143,342us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cree_PatentandLicenseRightsMember
134,607us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cree_PatentandLicenseRightsMember
Finite-lived intangible assets, accumulated amortization (46,863)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cree_PatentandLicenseRightsMember
(42,424)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cree_PatentandLicenseRightsMember
Finite-lived intangible assets, net $ 96,479us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cree_PatentandLicenseRightsMember
$ 92,183us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cree_PatentandLicenseRightsMember