Leases - Schedule Supplemental Disclosures (Details) - USD ($) $ in Millions	9 Months Ended
	Jun. 27, 2021	Jun. 28, 2020
Lessee, Lease, Description [Line Items]
Cash paid related to operating lease liabilities	$ 1,200.6	$ 1,089.4
Operating lease liabilities arising from obtaining ROU assets	$ 1,030.7	$ 770.4
Weighted-average remaining operating lease term	8 years 7 months 6 days	8 years 10 months 24 days
Weighted-average operating lease discount rate	2.50%	2.50%