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Discontinued Operations - Loss from Discontinued Operations, Net of Income Taxes (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 27, 2020	Mar. 27, 2022	Mar. 28, 2021	Mar. 27, 2022	Mar. 28, 2021	Jun. 27, 2021
Operating expenses:
Net loss		$ 0.0	$ (41.6)	$ 0.0	$ (178.8)
Net income from discontinued operations attributable to noncontrolling interest		0.0	0.8	0.0	1.4
Net loss from discontinued operations attributable to controlling interest		0.0	(42.4)	$ 0.0	(180.2)
Discontinued Operations, Disposed of by Sale | LED Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue, net			66.5		272.8
Cost of revenue, net			50.3		213.3
Gross profit			16.2		59.5
Operating expenses:
Research and development			5.9		22.3
Sales, general and administrative			12.5		29.4
Goodwill impairment	$ 6.9		0.0		112.6
Impairment on assets held for sale	$ 19.5		0.0
Gain on disposal or impairment of long-lived assets			(0.6)		(1.6)
Other operating expense			6.2		18.7
Operating loss			(7.8)		(141.4)
Non-operating income			(0.3)		(0.3)
Loss before income taxes and loss on sale			(7.5)
Loss on sale			26.3		29.1
Loss before income taxes			(33.8)		(167.4)
Income tax expense			7.8		11.4
Net loss		$ 0.5	(41.6)		(178.8)
Net income from discontinued operations attributable to noncontrolling interest			0.8		1.4
Net loss from discontinued operations attributable to controlling interest			$ (42.4)		(180.2)
Discontinued Operations, Held-for-sale | LED Business
Operating expenses:
Goodwill impairment						$ 105.7
Loss before income taxes and loss on sale					(141.1)
Loss on sale					$ 26.3

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- Definition

Disposal Group, Including Discontinued Operation, Other Operating Expense

+ References

No definition available.

+ Details

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- Definition

Disposal Group, Including Discontinued Operation, Research And Development Expense

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Disposal Group, Including Discontinued Operation, Sales, General And Administrative Expense

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DiscontinuedOperationsDisposedOfBySaleMember
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- Details

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- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DiscontinuedOperationsHeldforsaleMember
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