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Stock-Based Compensation - Narrative (Details) - plans | 3 Months Ended | 6 Months Ended
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Sep. 29, 2019 | Dec. 29, 2019
Employee Stock Purchase Plan |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Maximum contribution of employee's compensation (as a percent) |  | 15.00%
Employee stock plan purchase price of fair value (as a percent) |  | 15.00%
Number of times employees can purchase stock per year |  | 2
Discount from market price, beginning of participation period or purchase date (as a percent) |  | 15.00%
2013 Long-Term Incentive Compensation Plan |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of equity-based compensation plans | 1 |

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- Definition Number of times employees can purchase stock under Employee Stock Purchase Plan (ESPP), per year + References No definition available. + Details
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Namespace Prefix: | cree_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of equity-based compensation plans from which awards can be granted to employees and directors. + References No definition available. + Details
Name: | cree_ShareBasedCompensationEquityBasedCompensationPlanNumber
Namespace Prefix: | cree_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price,Beginning of Participation Period or Purchase Date + References No definition available. + Details
Name: | cree_SharebasedCompensationArrangementbySharebasedPaymentAwardDiscountfromMarketPriceBeginningofParticipationPeriodorPurchaseDate
Namespace Prefix: | cree_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Discount rate from fair value on purchase date that participants pay for shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Period Type: | duration

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- Definition The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Details
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Namespace Prefix: |
Data Type: | na
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Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |