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Discontinued Operations - Loss from Discontinued Operations, Net of Income Taxes (Details) - USD ($)
$ in Millions
 3 Months Ended
Dec. 27, 2020
Sep. 24, 2023
Sep. 25, 2022
Operating expenses:      
Net loss   $ (272.1) $ (12.1)
Discontinued Operations, Held-for-sale | RF Business      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Revenue, net   32.8 51.9
Cost of revenue, net   37.9 39.7
Gross (loss) profit   (5.1) 12.2
Operating expenses:      
Research and development   20.3 14.9
Sales, general and administrative   7.7 5.0
Amortization of intangibles   1.5 2.4
Impairment on assets held for sale $ 0.0 144.6  
Excess loss liability on assets held for sale   75.4 0.0
Other operating expense   17.1 2.1
Operating loss   (271.7) (12.2)
Non-operating income   0.0 (0.2)
Loss before income taxes   (271.7) (12.0)
Income tax expense   0.4 0.1
Net loss   $ (272.1) $ (12.1)