Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Oct. 03, 2025	Sep. 27, 2024	Sep. 29, 2023
Income Statement [Abstract]
Net revenue	$ 4,086.9	$ 4,178.0	$ 4,772.4
Cost of goods sold	2,404.8	2,457.2	2,665.1
Gross profit	1,682.1	1,720.8	2,107.3
Operating expenses:
Research and development	785.5	631.7	606.8
Selling, general, and administrative	371.5	300.8	314.0
Amortization of intangibles	0.9	0.9	33.2
Restructuring, impairment, and other charges	24.2	150.0	28.3
Total operating expenses	1,182.1	1,083.4	982.3
Operating income	500.0	637.4	1,125.0
Interest expense	(27.1)	(30.7)	(64.4)
Other income, net	53.8	29.7	18.2
Income before income taxes	526.7	636.4	1,078.8
Provision for income taxes	49.6	40.4	96.0
Net income	$ 477.1	$ 596.0	$ 982.8
Earnings per share:
Basic (in dollars per share)	$ 3.09	$ 3.72	$ 6.17
Diluted (in dollars per share)	$ 3.08	$ 3.69	$ 6.13
Weighted average shares:
Basic (in shares)	154.4	160.1	159.4
Diluted (in shares)	155.1	161.5	160.3
Common stock, dividends declared (in dollars per share)	$ 2.81	$ 2.74