Employee Stock and Benefit Plans (Stock-Based Compensation Expense Recognized in the Consolidated Financial Statements) (Details) - USD ($) $ in Millions	12 Months Ended
Oct. 03, 2021	Sep. 27, 2020	Sep. 29, 2019
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 319.1	$ 248.5	$ 308.0
Total related tax benefit	51.6	47.8	59.3
Total capitalized stock-based compensation included in net property, plant and equipment on the consolidated balance sheets	3.7	3.6	3.4
Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	2.2	7.5	20.0
Restricted Stock Units (RSUs) [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 316.9	$ 241.0	$ 288.0

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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