Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Name:	us-gaap_RestructuringCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Restructuring - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended			24 Months Ended
Restructuring - Narrative (Details) - USD ($)	Jun. 30, 2019	Jun. 30, 2019	Jun. 24, 2018	Jun. 25, 2017	Jun. 30, 2019
Restructuring Cost and Reserve [Line Items]
Total restructuring costs		$ 8,300,000	$ 3,800,000	$ 0
Factory optimization costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges expected to be incurred	$ 70,000,000.0	70,000,000.0			$ 70,000,000.0
Total restructuring costs		4,100,000
Sales Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring charges expected to be incurred	0	$ 0			0
Total restructuring costs	$ 1,600,000
Lighting Products
Restructuring Cost and Reserve [Line Items]
Restructuring charges classified as discontinued operations					$ 3,600,000