Leases - Schedule of Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Jun. 28, 2020	Jun. 28, 2020
Lessee, Lease, Description [Line Items]
Short-term lease costs	$ 8.1	$ 24.7
Operating lease costs	363.3	1,113.9
Variable lease costs	184.3	610.2
Total lease costs	$ 555.7	$ 1,748.8