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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 |  |

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