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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Mar. 29, 2015	Mar. 30, 2014
Cash flows from operating activities:
Net income	$ 23,932us-gaap_NetIncomeLoss	$ 94,342us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	130,393us-gaap_DepreciationDepletionAndAmortization	120,219us-gaap_DepreciationDepletionAndAmortization
Stock-based compensation	49,260us-gaap_ShareBasedCompensation	46,261us-gaap_ShareBasedCompensation
Excess tax benefit from stock-based payment arrangements	(1,656)us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	(18,396)us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities
Impairment of acquisition-related intangibles	254cree_Impairmentofacquisitionrelatedintangibles	0cree_Impairmentofacquisitionrelatedintangibles
Loss on disposal or impairment of long-lived assets	3,641us-gaap_GainLossOnDispositionOfAssets	1,781us-gaap_GainLossOnDispositionOfAssets
Amortization of premium/discount on investments	4,809us-gaap_InvestmentIncomeNetAmortizationOfDiscountAndPremium	7,674us-gaap_InvestmentIncomeNetAmortizationOfDiscountAndPremium
Loss on equity method investment	2,991us-gaap_UnrealizedGainLossOnInvestments	0us-gaap_UnrealizedGainLossOnInvestments
Foreign exchange loss on equity method investment	710us-gaap_ForeignCurrencyTransactionGainLossUnrealized	0us-gaap_ForeignCurrencyTransactionGainLossUnrealized
Changes in operating assets and liabilities:
Accounts receivable, net	7,579us-gaap_IncreaseDecreaseInAccountsReceivable	(29,829)us-gaap_IncreaseDecreaseInAccountsReceivable
Inventories	(15,101)us-gaap_IncreaseDecreaseInInventories	(53,511)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other assets	800us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	13,008us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Accounts payable, trade	(69,330)us-gaap_IncreaseDecreaseInAccountsPayableTrade	29,016us-gaap_IncreaseDecreaseInAccountsPayableTrade
Accrued salaries and wages and other liabilities	(44,583)us-gaap_IncreaseDecreaseInOtherAccruedLiabilities	17,605us-gaap_IncreaseDecreaseInOtherAccruedLiabilities
Net cash provided by operating activities	93,699us-gaap_NetCashProvidedByUsedInOperatingActivities	228,170us-gaap_NetCashProvidedByUsedInOperatingActivities
Cash flows from investing activities:
Purchases of property and equipment	(158,277)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment	(119,614)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Purchases of short-term investments	(254,883)us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt	(510,401)us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt
Proceeds from maturities of short-term investments	337,331us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	365,005us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities
Proceeds from sale of property and equipment	122us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment	117us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Proceeds from sale of short-term investments	207,551us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	22,387us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt
Purchases of patent and licensing rights	(14,550)us-gaap_PaymentsToAcquireIntangibleAssets	(14,755)us-gaap_PaymentsToAcquireIntangibleAssets
Purchase of other long-term investments	(80,566)us-gaap_PaymentsToAcquireEquityMethodInvestments	0us-gaap_PaymentsToAcquireEquityMethodInvestments
Net cash provided by (used in) investing activities	36,728us-gaap_NetCashProvidedByUsedInInvestingActivities	(257,261)us-gaap_NetCashProvidedByUsedInInvestingActivities
Cash flows from financing activities:
Proceeds from long-term debt borrowings	440,000us-gaap_ProceedsFromLongTermLinesOfCredit	0us-gaap_ProceedsFromLongTermLinesOfCredit
Payments on long-term debt borrowings	(290,000)us-gaap_RepaymentsOfLongTermLinesOfCredit	0us-gaap_RepaymentsOfLongTermLinesOfCredit
Net proceeds from issuance of common stock	26,832us-gaap_ProceedsFromStockOptionsExercised	89,476us-gaap_ProceedsFromStockOptionsExercised
Excess tax benefit from stock-based payment arrangements	1,656us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	18,396us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities
Repurchases of common stock	(390,088)us-gaap_PaymentsForRepurchaseOfCommonStock	(107)us-gaap_PaymentsForRepurchaseOfCommonStock
Net cash (used in) provided by financing activities	(211,600)us-gaap_NetCashProvidedByUsedInFinancingActivities	107,765us-gaap_NetCashProvidedByUsedInFinancingActivities
Effects of foreign exchange changes on cash and cash equivalents	(923)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents	95us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Net (decrease) increase in cash and cash equivalents	(82,096)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease	78,769us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents:
Beginning of period	286,824us-gaap_CashAndCashEquivalentsAtCarryingValue	190,069us-gaap_CashAndCashEquivalentsAtCarryingValue
End of period	$ 204,728us-gaap_CashAndCashEquivalentsAtCarryingValue	$ 268,838us-gaap_CashAndCashEquivalentsAtCarryingValue

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The cash outflow to reacquire common stock during the period.

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The cash outflow to acquire debt securities classified as available-for-sale securities, because they are not classified as either held-to-maturity securities or trading securities.

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

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The cash inflow associated with maturities (principal being due), prepayments and calls (requests of early payments) on securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities.

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The cash inflow associated with the sale of debt securities classified as available-for-sale securities.

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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of investments, not including unrealized gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, held at each balance sheet date and included in earnings for the period.

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