Supplemental Income Statement Information (Store Operating Expenses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Store Operating Expenses [Line Items]
Labor and Related Expense	$ 1,477.7	$ 1,500.3	$ 4,683.7	$ 4,395.8
store occupancy cost	555.5	611.6	1,768.1	1,800.0
Other Store Operating Expenses	504.6	531.3	1,628.9	1,597.4
Store operating expenses	$ 2,537.8	$ 2,643.2	$ 8,080.7	$ 7,784.2