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Intangible Assets (Components of intangible assets, net) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2015	Jun. 29, 2014
Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 457,119us-gaap_FiniteLivedIntangibleAssetsGross	$ 445,571us-gaap_FiniteLivedIntangibleAssetsGross
Finite-lived intangible assets, accumulated amortization	(214,570)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization	(188,828)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Finite-lived intangible assets, net	242,549us-gaap_FiniteLivedIntangibleAssetsNet	256,743us-gaap_FiniteLivedIntangibleAssetsNet
Trade names, indefinite-lived	79,680us-gaap_IndefiniteLivedTradeNames	79,680us-gaap_IndefiniteLivedTradeNames
Intangible Assets, Gross (Excluding Goodwill)	536,799us-gaap_IntangibleAssetsGrossExcludingGoodwill	525,251us-gaap_IntangibleAssetsGrossExcludingGoodwill
Intangible assets, net	322,229us-gaap_IntangibleAssetsNetExcludingGoodwill	336,423us-gaap_IntangibleAssetsNetExcludingGoodwill
Customer Relationships [Member]
Intangible Assets [Line Items]
Finite-lived intangible assets, gross	136,920us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember	137,440us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember
Finite-lived intangible assets, accumulated amortization	(70,737)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	66,183us-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	(86,902)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	75,858us-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	(7,467)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	2,777us-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	146,675us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = cree_PatentandLicenseRightsMember	134,607us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = cree_PatentandLicenseRightsMember
Finite-lived intangible assets, accumulated amortization	(48,944)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = cree_PatentandLicenseRightsMember	(42,424)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = cree_PatentandLicenseRightsMember
Finite-lived intangible assets, net	$ 97,731us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = cree_PatentandLicenseRightsMember	$ 92,183us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = cree_PatentandLicenseRightsMember

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