Leases (Details)	3 Months Ended	9 Months Ended
	Jun. 27, 2020 USD ($)	Jun. 27, 2020 USD ($)	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)		0.026
Finance lease liability, current			$ 1,800,000
Finance lease liabilities (non-current)			$ 19,200,000
Lease revenue as a percentage of total (percentage)	0.04
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability		$ 10,200,000
Lease Receivable	$ 19,700,000	$ 19,700,000
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