Commitments and Contingencies (Additional Information) (Details)	1 Months Ended	12 Months Ended
	Aug. 31, 2010 former_employee	Oct. 03, 2021 USD ($)	Sep. 27, 2020 USD ($)
Loss Contingencies [Line Items]
Estimated litigation liability		$ 7,500,000	$ 3,800,000
Lease guarantee		$ 26,700,000
Qdoba guaranteed leases, remaining term		16 years
Coca-Cola and Dr. Pepper Purchase Commitments
Loss Contingencies [Line Items]
Unconditional purchase obligations		$ 51,300,000
Coca-Cola
Loss Contingencies [Line Items]
Unrecorded purchase obligation period		4 years
Dr. Pepper
Loss Contingencies [Line Items]
Unrecorded purchase obligation period		5 years
Vendors Providing Information Technology Services
Loss Contingencies [Line Items]
Unrecorded purchase obligation period		2 years
Unconditional purchase obligations		$ 7,300,000
Information technology services, early contract termination fees		$ 0
Gessele v. Jack in the Box Inc.
Loss Contingencies [Line Items]
Number of former employees who instituted litigation | former_employee	5