Leases (Details) $ in Millions	3 Months Ended
	Dec. 28, 2019	Sep. 28, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Period with option to terminate lease	1 year
Extension period	20 years
Weighted average discount rate (percentage)	0.0257
Finance lease liability, current		$ 1.8
Finance lease liabilities (non-current)		$ 19.2
Lease revenue as a percentage of total (percentage)	0.03
Minimum
Lessee, Lease, Description [Line Items]
Lessee, Operating And Finance Lease, Remaining Lease Term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lessee, Operating And Finance Lease, Remaining Lease Term	15 years