Supplemental Income Statement Information (Store Operating Expenses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Store Operating Expenses [Line Items]
Wages and benefits	$ 1,750.7	$ 1,477.7	$ 5,021.8	$ 4,683.7
Occupancy costs	628.7	555.5	1,883.0	1,768.1
Other store operating expenses	587.5	504.6	1,752.8	1,628.9
Store operating expenses	$ 2,966.9	$ 2,537.8	$ 8,657.6	$ 8,080.7