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Commitments and Contingencies (Litigation) (Details)	1 Months Ended	3 Months Ended	0 Months Ended				1 Months Ended			1 Months Ended
	Sep. 29, 2013	Sep. 29, 2013 USD ($)	Feb. 19, 2013 Cooper Lighting, LLC [Member] Patents	Sep. 07, 2012 Cooper Lighting, LLC [Member] Patents	Apr. 02, 2010 Cooper Lighting, LLC [Member] Patents	Jun. 07, 2010 Illumination Management Solutions, Inc. [Member] Patents	Jan. 31, 2013 Illumination Management Solutions, Inc. [Member] Employees	Apr. 29, 2009 Dynacraft Industries Litigation [Member] USD ($)	Apr. 29, 2009 Dynacraft Industries Litigation [Member] MYR	Jan. 31, 2013 Minimum [Member] Illumination Management Solutions, Inc. [Member] Patents
Loss Contingencies [Line Items]
Gain Contingency, Patents Allegedly Infringed upon, Number			2		2
Loss Contingency, Patents Allegedly Infringed, Number				1		2				1
Loss Contingency, Number of Defendants							2
Gain and Loss Contingency, Claims Settled, Number	6
Gain and Loss Contingency, Claims Settled, Royalty-Free Cross License Period	7 years
Gain and Loss Contingency, Claims Settled, Supply Agreement Term	7 years
Non-Cash Litigation Settlement Charge		$ 17,400,000
Indemnification Obligation Refund Related to Business Combination		17,400,000
Contract Price, Real Property								$ 12,000,000	38,000,000

X

- Definition

Contract price of the real property subject to litigation claim.

+ References

No definition available.

+ Details

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Namespace Prefix:	cree_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Royalty-free cross license period for patent portfolio cross license agreement reached as part of litigation settlement.

+ References

No definition available.

+ Details

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Namespace Prefix:	cree_
Data Type:	xbrli:durationItemType
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Period Type:	duration

X

- Definition

Term of supply agreement reached as part of litigation settlement.

+ References

No definition available.

+ Details

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Namespace Prefix:	cree_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Indemnification obligation refund related to business combination.

+ References

No definition available.

+ Details

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Namespace Prefix:	cree_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Number of entity's patents that another entity has allegedly infringed.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of claims settled.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
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X

- Definition

Number of defendants named in a legal action.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of another entity's patents that the entity has allegedly infringed.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
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