Leases - Schedule Supplemental Disclosures (Details) - USD ($) $ in Millions	6 Months Ended
	Mar. 28, 2021	Mar. 29, 2020
Lessee, Lease, Description [Line Items]
Cash paid related to operating lease liabilities	$ 792.4	$ 726.0
Operating lease liabilities arising from obtaining ROU assets	$ 659.6	$ 506.6
Weighted-average remaining operating lease term	8 years 8 months 12 days	8 years 10 months 24 days
Weighted-average operating lease discount rate	2.40%	2.50%