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BASIS OF PRESENTATION - Narrative (Details) $ in Millions | 3 Months Ended | 4 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jul. 10, 2022 USD ($) | Jul. 04, 2021 USD ($) | Jan. 23, 2022 | Jul. 10, 2022 USD ($) restaurant | Jul. 04, 2021 USD ($)
Net Investment Income [Line Items] |  |  |  |  |
Marketing and advertising expense | $ | $ 9.8 | $ 4.6 |  | $ 22.9 | $ 14.8
Jack in the box brand restaurant operations |  |  |  |  |
Net Investment Income [Line Items] |  |  |  |  |
Contractual obligation (percent) |  |  | 5.00% | 5.00% |
Del Taco |  |  |  |  |
Net Investment Income [Line Items] |  |  |  |  |
Contractual obligation (percent) |  |  |  | 4.00% |
Company operated | Jack in the box brand restaurant operations |  |  |  |  |
Net Investment Income [Line Items] |  |  |  |  |
Number of operating segments |  |  |  | 171 |
Company operated | Del Taco |  |  |  |  |
Net Investment Income [Line Items] |  |  |  |  |
Number of operating segments |  |  |  | 291 |
Franchise-operated | Jack in the box brand restaurant operations |  |  |  |  |
Net Investment Income [Line Items] |  |  |  |  |
Number of operating segments |  |  |  | 2,036 |
Franchise-operated | Del Taco |  |  |  |  |
Net Investment Income [Line Items] |  |  |  |  |
Number of operating segments |  |  |  | 303 |

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