Stockholder's Equity (Share Based Compensation) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Apr. 01, 2022	Mar. 31, 2023	Apr. 01, 2022
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Document Period End Date			Mar. 31, 2023
Share-based compensation expense	$ 40.9	$ 55.7	$ 90.4	$ 106.1
Cost of sales [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	7.5	6.3	10.2	14.9
Research and development [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	17.4	27.3	45.3	50.2
Selling, general and administrative [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	$ 16.0	$ 22.1	$ 34.9	$ 41.0