Supplemental Statement of Earnings Information (Store Operating Expenses) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 30, 2018
Store Operating Expense [Line Items]
Labor and Related Expense	$ 6,131.9	$ 5,941.7	$ 5,319.2
Store Occupancy Cost	2,388.0	2,411.2	2,250.5
Other Store Operating Expenses	2,244.1	2,140.7	1,902.5
Store operating expenses	$ 10,764.0	$ 10,493.6	$ 9,472.2