Stockholder's Equity (Share Based Compensation) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Document Period End Date			Jun. 30, 2023
Share-based compensation expense	$ 44.8	$ 52.1	$ 135.2	$ 158.2
Cost of sales [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	3.3	8.0	13.4	22.9
Research and development [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	24.4	24.2	69.7	74.4
Selling, general and administrative [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	$ 17.1	$ 19.9	$ 52.1	$ 60.9