Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 28, 2025	Mar. 29, 2024	Mar. 28, 2025	Mar. 29, 2024
Income Statement [Abstract]
Net revenue	$ 953.2	$ 1,046.0	$ 2,021.7	$ 2,247.5
Cost of goods sold	561.6	625.7	1,188.2	1,320.7
Gross profit	391.6	420.3	833.5	926.8
Operating expenses:
Research and development	186.5	154.4	362.9	307.3
Selling, general, and administrative	88.0	76.8	170.6	155.5
Amortization of intangibles	0.2	0.2	0.5	0.5
Restructuring, impairment, and other charges (benefits)	19.6	(0.3)	21.1	15.9
Total operating expenses	294.3	231.1	555.1	479.2
Operating income	97.3	189.2	278.4	447.6
Interest expense	(6.8)	(7.1)	(13.6)	(17.1)
Other income, net	11.9	10.8	28.0	14.1
Income before income taxes	102.4	192.9	292.8	444.6
Provision for income taxes	33.7	9.6	62.1	30.0
Net income	$ 68.7	$ 183.3	$ 230.7	$ 414.6
Earnings per share:
Basic (in dollars per share)	$ 0.43	$ 1.14	$ 1.45	$ 2.59
Diluted (in dollars per share)	$ 0.43	$ 1.14	$ 1.44	$ 2.57
Weighted average shares:
Basic (in shares)	158.5	160.4	159.4	160.1
Diluted (in shares)	158.8	161.4	160.1	161.3
Common stock, dividends declared (in dollars per share)	$ 0.70	$ 0.68	$ 1.40	$ 1.36