Stockholders' Equity (Share Based Expense Allocation) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Oct. 02, 2015	Oct. 03, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Compensation	$ 78.0	$ 99.8	$ 86.0
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	22.5	29.3	25.6
Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount	3.7	2.3	1.7
Cost of Sales [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	11.3	14.5	11.3
Research and Development Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	32.2	45.4	36.2
General and Administrative Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	$ 34.5	$ 39.9	$ 38.5