Segment Information And Concentrations, Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 03, 2025	Sep. 27, 2024	Sep. 29, 2023
Segment Reporting Information [Line Items]
Revenue by geographic area	$ 4,086.9	$ 4,178.0	$ 4,772.4
Revenue by sales channel	4,086.9	4,178.0	4,772.4
Distributors
Segment Reporting Information [Line Items]
Revenue by sales channel	3,525.6	3,622.6	4,235.7
Direct customers
Segment Reporting Information [Line Items]
Revenue by sales channel	561.3	555.4	536.7
United States
Segment Reporting Information [Line Items]
Revenue by geographic area	3,157.1	3,202.2	3,603.9
Taiwan
Segment Reporting Information [Line Items]
Revenue by geographic area	259.1	317.5	344.4
China
Segment Reporting Information [Line Items]
Revenue by geographic area	254.2	303.4	358.3
South Korea
Segment Reporting Information [Line Items]
Revenue by geographic area	190.1	203.9	198.3
Europe, Middle East, and Africa
Segment Reporting Information [Line Items]
Revenue by geographic area	185.8	114.5	204.2
Other Asia-Pacific
Segment Reporting Information [Line Items]
Revenue by geographic area	$ 40.6	$ 36.5	$ 63.3