Employee Stock Plans (Stock-Based Compensation Expense Recognized in Consolidated Statement of Earnings) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 28, 2021	Mar. 29, 2020	Mar. 28, 2021	Mar. 29, 2020
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 76.0	$ 56.3	$ 175.3	$ 146.6
Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	0.9	0.7	1.8	2.4
Restricted Stock Units (RSUs) [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 75.1	$ 55.6	$ 173.5	$ 144.2