Employee Stock and Benefit Plans (Stock-Based Compensation Expense Recognized in the Consolidated Financial Statements) (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Sep. 29, 2019	Sep. 30, 2018	Oct. 01, 2017
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0.5
Stock-based compensation expense	$ 308.0	$ 250.3	$ 176.0
Total related tax benefit	59.3	62.4	57.6
Total capitalized stock-based compensation included in net property, plant and equipment and inventories on the consolidated balance sheets	3.4	3.5	1.9
Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	20.0	28.0	44.3
Restricted Stock Units (RSUs) [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 288.0	$ 222.3	$ 131.7