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Reportable Segments Schedule of Financial Results, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 25, 2017	Mar. 26, 2017	Dec. 25, 2016	Sep. 25, 2016	Jun. 26, 2016	Mar. 27, 2016	Dec. 27, 2015	Sep. 27, 2015	Jun. 25, 2017	Jun. 26, 2016	Jun. 28, 2015
Segment Reporting Information [Line Items]
Revenue	$ 358,939	$ 341,505	$ 401,325	$ 371,231	$ 388,413	$ 366,919	$ 435,806	$ 425,489	$ 1,473,000	$ 1,616,627	$ 1,632,505
Gross profit	$ 98,001	$ 86,076	$ 140,566	$ 109,929	$ 113,023	$ 109,033	$ 134,445	$ 130,573	$ 434,572	$ 487,074	$ 473,919
Gross margin									30.00%	30.00%	29.00%
Lighting Products [Member]
Segment Reporting Information [Line Items]
Revenue									$ 701,467	$ 889,133	$ 906,502
Gross profit									$ 196,218	$ 238,242	$ 235,542
Gross margin									28.00%	27.00%	26.00%
LED Products [Member]
Segment Reporting Information [Line Items]
Revenue									$ 550,302	$ 551,156	$ 554,987
Gross profit									$ 151,675	$ 173,814	$ 158,955
Gross margin									28.00%	32.00%	29.00%
Wolfspeed [Member]
Segment Reporting Information [Line Items]
Revenue									$ 221,231	$ 176,338	$ 171,016
Gross profit									$ 103,465	$ 94,622	$ 99,721
Gross margin									47.00%	54.00%	58.00%
SegmentsTotal [Member]
Segment Reporting Information [Line Items]
Gross profit									$ 451,358	$ 506,678	$ 494,218
Unallocated costs [Member]
Segment Reporting Information [Line Items]
Gross profit									$ (16,786)	$ (19,604)	$ (20,299)

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1,2)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(a))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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