Summary of Refranchisings and Franchise Acquisitions (Narrative) (Details) $ in Thousands	12 Months Ended
	Oct. 01, 2023 USD ($) restaurant	Oct. 02, 2022 USD ($) restaurant	Oct. 03, 2021 USD ($) restaurant	Jan. 22, 2023 USD ($)
Summary Of Refranchisings, Franchisee Development And Acquisitions [Line Items]
Number of restaurants acquired from franchisees | restaurant	0	13	20
Goodwill	$ 329,986	$ 366,821	$ 47,774
Revision of Prior Period, Adjustment
Summary Of Refranchisings, Franchisee Development And Acquisitions [Line Items]
Goodwill				$ 300
Franchise Acquisitions
Summary Of Refranchisings, Franchisee Development And Acquisitions [Line Items]
Receivables eliminated in acquisition accounting		300
Goodwill		$ 0	$ 613