Leases - Narrative (Details) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 28, 2021 USD ($)	Mar. 28, 2021 USD ($)
Lessee, Lease, Description [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 23.0	$ 95.2
Leases [Abstract]
Lessee, operating lease, lease not yet commenced, amount	$ 761.9	$ 761.9
Minimum [Member]
Leases [Abstract]
Lessee, operating lease, lease not yet commenced, term of contract	3 years	3 years
Maximum [Member]
Leases [Abstract]
Lessee, operating lease, lease not yet commenced, term of contract	20 years	20 years
Lease termination [Member]
Lessee, Lease, Description [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 14.4	$ 44.0