Stockholders' Equity, Share-Based Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 02, 2026	Dec. 27, 2024
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	$ 57.7	$ 51.1
Cost of goods sold
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	17.4	7.3
Research and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	29.9	25.6
Selling, general, and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	$ 10.4	$ 18.2