Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Jan. 01, 2021	Dec. 27, 2019
Income Statement [Abstract]
Document Period End Date	Jan. 01, 2021
Net revenue	$ 1,510.0	$ 896.1
Cost of goods sold	748.3	451.8
Gross profit	761.7	444.3
Operating expenses:
Research and development	121.6	107.7
Selling, general, and administrative	66.6	55.4
Amortization of intangibles	2.8	3.1
Restructuring Costs and Asset Impairment Charges	0.0	0.8
Total operating expenses	191.0	167.0
Operating income	570.7	277.3
Other income, net	0.2	1.4
Income before income taxes	570.9	278.7
Provision for income taxes	61.6	21.6
Net income	$ 509.3	$ 257.1
Earnings per share:
Basic (in dollars per share)	$ 3.08	$ 1.51
Diluted (in dollars per share)	$ 3.05	$ 1.50
Weighted average shares:
Basic (in shares)	165.4	170.2
Diluted (in shares)	167.0	171.6
Common Stock, Dividends, Per Share, Declared	$ 0.50	$ 0.44