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BASIS OF PRESENTATION - Narrative (Details) $ in Millions | 4 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 22, 2023 USD ($) restaurant | Jan. 23, 2022 USD ($) | Oct. 02, 2022 USD ($)
Net Investment Income [Line Items] |  |  |
Contractual obligation | $ | $ 0.1 |  | $ 0.0
Marketing and advertising expense | $ | $ 12.2 | $ 6.1 |
Jack in the Box |  |  |
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 |  |  |
Net Investment Income [Line Items] |  |  |
Number of operating segments | 140 |  |
Company operated | Del Taco |  |  |
Net Investment Income [Line Items] |  |  |
Number of operating segments | 273 |  |
Franchise-operated | Jack in the Box |  |  |
Net Investment Income [Line Items] |  |  |
Number of operating segments | 2,046 |  |
Franchise-operated | Del Taco |  |  |
Net Investment Income [Line Items] |  |  |
Number of operating segments | 319 |  |

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