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Commitments, Contingencies and Legal Matters (Additional Information) (Details) - USD ($) $ in Millions |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jun. 11, 2019 | Jan. 31, 2019 | Oct. 31, 2019 | Feb. 28, 2019 | Sep. 29, 2019 | Sep. 29, 2019
Gessele v. Jack in the Box Inc. |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Damages sought |  | $ 62.0 |  | $ 42.0 |  |
Ramirez v. Jack in the Box Inc. |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Litigation charge recorded in period |  |  |  |  |  | $ 8.3
Litigation insurance recovery receivable |  |  |  |  |  | $ 8.3
Ramirez v. Jack in the Box Inc. | Judicial Ruling |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Compensatory damages awarded | $ 5.4 |  |  |  |  |
Punitive damages awarded | $ 10.0 |  |  |  |  |
Minimum | Ramirez v. Jack in the Box Inc. | Judicial Ruling |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Reduction in damages awarded |  |  |  |  | $ 3.2 |
Maximum | Ramirez v. Jack in the Box Inc. | Judicial Ruling |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Reduction in damages awarded |  |  |  |  | $ 15.4 |
Subsequent Event | Ramirez v. Jack in the Box Inc. | Judicial Ruling |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Plaintiff motion for attorney fees, amount |  |  | $ 5.1 |  |  |

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