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Discontinued Operations - Narrative (Details) - Discontinued Operations, Held-for-sale or Disposed of by Sale - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Mar. 29, 2020
Mar. 29, 2020
May 13, 2019
Lighting Products      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Aggregate net proceeds from sale of business unit     $ 219.0
Loss on sale   $ 66.2  
Transmission Service Agreement      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Administrative fees $ 2.5 8.1  
LED Supply Agreement      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Revenue 3.2 9.7  
Contract liability $ 10.5 10.5  
Accounts Receivable, Net | Transmission Service Agreement      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Administrative fees   1.7  
Accounts Receivable, Net | LED Supply Agreement      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Administrative fees   $ 0.8