Basis of Presentation - Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Apr. 12, 2020	Apr. 14, 2019	Apr. 12, 2020	Apr. 14, 2019	Sep. 27, 2020	Sep. 30, 2019	Sep. 29, 2019
Lessee, Lease, Description [Line Items]
Operating lease liabilities	$ 944,730		$ 944,730
Right-of-use assets	903,010		903,010			$ 880,564
Revenues	216,157	$ 215,727	523,830	$ 506,513
Expenses	183,315	$ 168,604	421,038	$ 401,066
Assets
Intangible assets, net	294		294			39	$ 425
Deferred tax assets	77,410		77,410			86,570	85,564
Liabilities and Stockholders’ Deficit
Current operating lease liabilities	163,077		163,077			159,821
Accrued liabilities	120,949		120,949			115,381	120,083
Long-term operating lease liabilities, net of current portion	781,653		781,653			770,818
Other long-term liabilities	242,368		242,368			221,887	263,770
Retained earnings	$ 1,574,930		$ 1,574,930			1,574,164	$ 1,577,034
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating lease liabilities						931,000
Right-of-use assets						880,564
Assets
Intangible assets, net						(386)
Deferred tax assets						1,006
Liabilities and Stockholders’ Deficit
Current operating lease liabilities						159,821
Accrued liabilities						(4,702)
Long-term operating lease liabilities, net of current portion						770,818
Other long-term liabilities						(41,883)
Retained earnings						$ (2,870)
Accounting Standards Update 2016-02 | Forecast
Lessee, Lease, Description [Line Items]
Revenues					$ 37,000
Expenses					$ 37,000