Composition Of Certain Financial Statement Captions (Narrative) (Details) - USD ($) $ in Thousands	Mar. 29, 2024	Sep. 29, 2023
Composition Of Certain Financial Statement Captions [Line Items]
Unbilled Receivables, Current	$ 151,000	$ 150,400
Raw materials	3,250	6,203
Other Noncurrent Assets [Member]
Composition Of Certain Financial Statement Captions [Line Items]
Raw materials	$ 12,800	$ 8,100