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Commitments and Contingencies Litigation (Details) (Pending Litigation, Dynacraft Industries Litigation) In Millions, unless otherwise specified | Apr. 29, 2009 USD ($) | Apr. 29, 2009 MYR
--- | --- | ---
Loss Contingencies [Line Items] |  |
Contract Price, Real Property | $ 10.8 | 38.0

X
- Definition Contract Price, Real Property + References No definition available. + Details
Name: | cree_ContractPriceRealProperty
Namespace Prefix: | cree_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration