Stockholder's Equity (Share Based Compensation) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2021	Jan. 01, 2021
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Document Period End Date	Dec. 31, 2021
Share-based compensation expense	$ 50.4	$ 44.5
Cost of sales [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	8.7	6.4
Research and development [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	18.8	20.3
Selling, general and administrative [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	$ 22.9	$ 17.8