Leases - Supplemental Cash Flow (Details) $ in Thousands	9 Months Ended
	Jun. 26, 2020 USD ($)
Leases [Abstract]
Cash paid for amounts included in the measurements of lease liabilities	$ 148,047
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 67,290
Weighted average remaining lease term - operating leases	7 years 4 months 24 days
Weighted average discount rate - operating leases	2.80%