Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Sep. 27, 2024	Sep. 29, 2023	Sep. 30, 2022
Income Statement [Abstract]
Net revenue	$ 4,178.0	$ 4,772.4	$ 5,485.5
Cost of goods sold	2,457.2	2,665.1	2,881.2
Gross profit	1,720.8	2,107.3	2,604.3
Operating expenses:
Research and development	631.7	606.8	617.9
Selling, general, and administrative	300.8	314.0	329.8
Amortization of intangibles	0.9	33.2	98.9
Impairment, restructuring, and other charges	150.0	28.3	30.7
Total operating expenses	1,083.4	982.3	1,077.3
Operating income	637.4	1,125.0	1,527.0
Interest expense	(30.7)	(64.4)	(47.9)
Other income (expense), net	29.7	18.2	(2.5)
Income before income taxes	636.4	1,078.8	1,476.6
Provision for income taxes	40.4	96.0	201.4
Net income	$ 596.0	$ 982.8	$ 1,275.2
Earnings per share:
Basic (in dollars per share)	$ 3.72	$ 6.17	$ 7.85
Diluted (in dollars per share)	$ 3.69	$ 6.13	$ 7.81
Weighted average shares:
Basic (in shares)	160.1	159.4	162.4
Diluted (in shares)	161.5	160.3	163.3
Common stock, dividends declared (in dollars per share)	$ 2.74	$ 2.54