Stockholder's Equity (Share Based Compensation) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 02, 2021	Jun. 26, 2020	Jul. 02, 2021	Jun. 26, 2020
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Document Period End Date			Jul. 02, 2021
Share-based compensation expense	$ 43.4	$ 37.8	$ 144.3	$ 111.6
Cost of sales [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	4.9	4.7	24.0	16.1
Research and development [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	17.9	17.0	62.2	49.0
Selling, general and administrative [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	$ 20.6	$ 16.1	$ 58.1	$ 46.5