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Basis of Presentation and New Accounting Standards - Narrative (Details)
 1 Months Ended 3 Months Ended 12 Months Ended
Oct. 31, 2020
USD ($)
Sep. 27, 2020
USD ($)
reportable_segments
Jun. 28, 2020
USD ($)
Sep. 29, 2019
USD ($)
Jun. 30, 2019
USD ($)
Basis of Presentation and Changes in Significant Accounting Policies [Line Items]          
Number of reportable segments | reportable_segments   2      
Accounting Standards Update [Extensible List]     us-gaap:AccountingStandardsUpdate201613Member    
Change in Accounting Principle, Accounting Standards Update, Transition Option Elected [Extensible List]     us-gaap:AccountingStandardsUpdate201602ModifiedRetrospectiveMember    
Stockholders' equity   $ 1,915,100,000 $ 2,089,200,000 $ 2,025,600,000 $ 2,041,200,000
Maximum | LED Products | Subsequent Event          
Basis of Presentation and Changes in Significant Accounting Policies [Line Items]          
Proceeds from divestiture of business $ 300,000,000        
Retained Earnings          
Basis of Presentation and Changes in Significant Accounting Policies [Line Items]          
Stockholders' equity   $ (1,223,600,000) (1,039,200,000) $ (885,300,000) $ (847,500,000)
Accounting Standards Update 2016-13 | Retained Earnings | Cumulative Effect, Period of Adoption, Adjustment          
Basis of Presentation and Changes in Significant Accounting Policies [Line Items]          
Stockholders' equity     $ 0