Leases Narrative (Details) $ in Millions	12 Months Ended
	Aug. 26, 2020 USD ($) lease
Lessee, Lease, Description [Line Items]
Number of sale and leaseback transactions | lease	6
Sale and leaseback transaction, gross proceeds | $	$ 19.3
Sale and leaseback transaction, gain (loss), net | $	$ 11.1
Minimum
Lessee, Lease, Description [Line Items]
Lease primary term	5 years
Lease renewal term	1 year
Sale leaseback transaction, lease term	9 months
Maximum
Lessee, Lease, Description [Line Items]
Lease primary term	30 years
Lease renewal term	5 years
Sale leaseback transaction, lease term	12 months
Number of related party leases | lease	2