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BASIS OF PRESENTATION - Narrative (Details) $ in Thousands | 6 Months Ended
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Apr. 13, 2025 USD ($) segment restaurant reporting_unit | Apr. 14, 2024 USD ($)
Net Investment Income [Line Items] |  |
Number of operating segments | segment | 2 |
Number of reporting units | reporting_unit | 2 |
Franchise advertising and other services expenses | $ | $ 134,744 | $ 139,757
Marketing and advertising expense | $ | $ 18,400 | $ 18,200
Jack in the Box 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 restaurant operations |  |
Net Investment Income [Line Items] |  |
Number of operating segments | 146 |
Company operated | Del Taco |  |
Net Investment Income [Line Items] |  |
Number of operating segments | 117 |
Franchise-operated | Jack in the Box restaurant operations |  |
Net Investment Income [Line Items] |  |
Number of operating segments | 2,037 |
Franchise-operated | Del Taco |  |
Net Investment Income [Line Items] |  |
Number of operating segments | 474 |

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