Contingencies and Legal Matters	6 Months Ended
Apr. 15, 2018
Legal Matters and Contingencies [Abstract]
Contingencies and Legal Matters	Legal matters — We assess contingencies, including litigation contingencies, to determine the degree of probability and range of possible loss for potential accrual in our financial statements. An estimated loss contingency is accrued in the financial statements if it is probable that a liability has been incurred and the amount of the loss can be reasonably estimated. Because litigation is inherently unpredictable, assessing contingencies is highly subjective and requires judgments about future events. When evaluating litigation contingencies, we may be unable to provide a meaningful estimate due to a number of factors, including the procedural status of the matter in question, the availability of appellate remedies, insurance coverage related to the claim or claims in question, the presence of complex or novel legal theories, and/or the ongoing discovery and development of information important to the matter. In addition, damage amounts claimed in litigation against us may be unsupported, exaggerated or unrelated to possible outcomes, and as such are not meaningful indicators of our potential liability or financial exposure. We regularly review contingencies to determine the adequacy of the accruals and related disclosures. The ultimate amount of loss may differ from these estimates. Gessele v. Jack in the Box Inc. — In August 2010, five former employees instituted litigation in federal court in Oregon alleging claims under the federal Fair Labor Standards Act and Oregon wage and hour laws. The plaintiffs alleged that the Company failed to pay non-exempt employees for certain meal breaks and improperly made payroll deductions for shoe purchases and for workers’ compensation expenses, and later added additional claims relating to timing of final pay and related wage and hour claims involving employees of a franchisee. In 2016, the court dismissed the federal claims and those relating to franchise employees. In June 2017, the court granted class certification with respect to state law claims of improper deductions and late payment of final wages. In fiscal 2012, we accrued for a single claim for which we believe a loss is both probable and estimable; this accrued loss contingency did not have a material effect on our results of operations. We continue to believe that no additional losses are probable beyond this accrual and cannot estimate a possible loss contingency or range of reasonably possible loss contingencies beyond the accrual. We plan to vigorously defend against this lawsuit. Nonetheless, an unfavorable resolution of this matter in excess of our current accrued loss contingencies could have a material adverse effect on our business, results of operations, liquidity or financial condition. Other legal matters — In addition to the matter described above, we are subject to normal and routine litigation brought by former, current or prospective employees, customers, franchisees, vendors, landlords, shareholders or others. We intend to defend ourselves in any such matters. Some of these matters may be covered, at least in part, by insurance or other third party indemnity obligation. Our insurance liability (undiscounted) and reserves are established in part by using independent actuarial estimates of expected losses for reported claims and for estimating claims incurred but not reported. We believe that the ultimate determination of liability in connection with legal claims pending against us, if any, in excess of amounts already provided for such matters in the condensed consolidated financial statements, will not have a material adverse effect on our business, our annual results of operations, liquidity or financial position; however, it is possible that our business, results of operations, liquidity, or financial condition could be materially affected in a particular future reporting period by the unfavorable resolution of one or more matters or contingencies during such period. Lease guarantees — While all operating leases held in the name of Qdoba were part of the Qdoba Sale, some of the leases remain guaranteed by the Company pursuant to one or more written guarantees. In the event Qdoba fails to meet its payment and performance obligations under such guaranteed leases, we may be required to make rent and other payments to the landlord under the requirements of the Guarantees. Qdoba continues to meet its obligations under these leases and there have not been any events that would indicate that Qdoba will not continue to meet the obligations of the leases. As such, we have not recorded a liability for the Guarantees as of April 15, 2018 as the likelihood of Qdoba defaulting on the assigned agreements was deemed to be less than probable. Refer to Note 2, Discontinued Operations, for additional information regarding the Guarantees.

Legal matters — We assess contingencies, including litigation contingencies, to determine the degree of probability and range of possible loss for potential accrual in our financial statements. An estimated loss contingency is accrued in the financial statements if it is probable that a liability has been incurred and the amount of the loss can be reasonably estimated. Because litigation is inherently unpredictable, assessing contingencies is highly subjective and requires judgments about future events. When evaluating litigation contingencies, we may be unable to provide a meaningful estimate due to a number of factors, including the procedural status of the matter in question, the availability of appellate remedies, insurance coverage related to the claim or claims in question, the presence of complex or novel legal theories, and/or the ongoing discovery and development of information important to the matter. In addition, damage amounts claimed in litigation against us may be unsupported, exaggerated or unrelated to possible outcomes, and as such are not meaningful indicators of our potential liability or financial exposure. We regularly review contingencies to determine the adequacy of the accruals and related disclosures. The ultimate amount of loss may differ from these estimates.

Gessele v. Jack in the Box Inc. — In August 2010, five former employees instituted litigation in federal court in Oregon alleging claims under the federal Fair Labor Standards Act and Oregon wage and hour laws. The plaintiffs alleged that the Company failed to pay non-exempt employees for certain meal breaks and improperly made payroll deductions for shoe purchases and for workers’ compensation expenses, and later added additional claims relating to timing of final pay and related wage and hour claims involving employees of a franchisee. In 2016, the court dismissed the federal claims and those relating to franchise employees. In June 2017, the court granted class certification with respect to state law claims of improper deductions and late payment of final wages. In fiscal 2012, we accrued for a single claim for which we believe a loss is both probable and estimable; this accrued loss contingency did not have a material effect on our results of operations. We continue to believe that no additional losses are probable beyond this accrual and cannot estimate a possible loss contingency or range of reasonably possible loss contingencies beyond the accrual. We plan to vigorously defend against this lawsuit. Nonetheless, an unfavorable resolution of this matter in excess of our current accrued loss contingencies could have a material adverse effect on our business, results of operations, liquidity or financial condition.

Other legal matters — In addition to the matter described above, we are subject to normal and routine litigation brought by former, current or prospective employees, customers, franchisees, vendors, landlords, shareholders or others. We intend to defend ourselves in any such matters. Some of these matters may be covered, at least in part, by insurance or other third party indemnity obligation. Our insurance liability (undiscounted) and reserves are established in part by using independent actuarial estimates of expected losses for reported claims and for estimating claims incurred but not reported. We believe that the ultimate determination of liability in connection with legal claims pending against us, if any, in excess of amounts already provided for such matters in the condensed consolidated financial statements, will not have a material adverse effect on our business, our annual results of operations, liquidity or financial position; however, it is possible that our business, results of operations, liquidity, or financial condition could be materially affected in a particular future reporting period by the unfavorable resolution of one or more matters or contingencies during such period.

Lease guarantees — While all operating leases held in the name of Qdoba were part of the Qdoba Sale, some of the leases remain guaranteed by the Company pursuant to one or more written guarantees. In the event Qdoba fails to meet its payment and performance obligations under such guaranteed leases, we may be required to make rent and other payments to the landlord under the requirements of the Guarantees. Qdoba continues to meet its obligations under these leases and there have not been any events that would indicate that Qdoba will not continue to meet the obligations of the leases. As such, we have not recorded a liability for the Guarantees as of April 15, 2018 as the likelihood of Qdoba defaulting on the assigned agreements was deemed to be less than probable. Refer to Note 2, Discontinued Operations, for additional information regarding the Guarantees.