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Balance Sheet Components - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 29, 2025
Dec. 28, 2024
Mar. 30, 2024
Mar. 29, 2025
Mar. 30, 2024
Sep. 28, 2024
Finite-Lived Intangible Assets [Line Items]            
Accumulated inventory write-downs $ 29.8     $ 29.8   $ 33.3
Amortization expenses $ 0.9   $ 0.9 1.7 $ 1.7  
Revenue recognized from previous period       $ 80.8 $ 82.7  
Mayht Holding BV | In Process Research and Development            
Finite-Lived Intangible Assets [Line Items]            
Provisional information, adjustment, intangibles   $ 73.8        
Finite-lived intangible asset, useful life   7 years