Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Jul. 05, 2020	Sep. 30, 2019	Sep. 29, 2019
Leases [Abstract]
Operating lease right-of-use assets	$ 902,858	$ 880,564	$ 0
Finance lease right-of-use asset	2,511
Total ROU assets	905,369
Current operating lease liabilities	169,347	159,821
Current finance lease liabilities	821
Long-term operating lease liabilities, net of current portion	777,883	$ 770,818
Long-term finance lease liabilities	2,306
Total lease liabilities	$ 950,357