Leases - Schedule Supplemental Disclosures (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 27, 2020	Dec. 29, 2019
Lessee, Lease, Description [Line Items]
Cash paid related to operating lease liabilities	$ 385.6	$ 368.9
Operating lease liabilities arising from obtaining ROU assets	$ 353.8	$ 226.4
Weighted-average remaining operating lease term	8 years 9 months 18 days	9 years
Weighted-average operating lease discount rate	2.50%	2.50%