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Contingencies and Legal Matters (Details) - USD ($) $ in Millions |  |  |  | 1 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jan. 09, 2020 | Jun. 11, 2019 | Jan. 31, 2019 | Nov. 30, 2019 | Oct. 31, 2019 | Feb. 28, 2019 | Apr. 12, 2020 | Sep. 29, 2019
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Accrual of loss contingency |  |  |  |  |  |  | $ 14.2 | $ 10.0
Gessele v. Jack in the Box Inc. |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Alleged total potential damages |  |  | $ 62.0 |  |  | $ 42.0 |  |
Claimed damages disallowed by the court |  |  |  | $ 25.0 |  |  |  |
Ramirez v. Jack in the Box Inc. |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Net charge for estimated litigation liability |  |  |  |  |  |  | 7.3 |
Litigation insurance recovery receivable |  |  |  |  |  |  | $ 7.3 |
Ramirez v. Jack in the Box Inc. | Judicial Ruling |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Jury verdict for compensatory damages |  | $ 5.4 |  |  |  |  |  |
Jury verdict for punitive damages |  | 10.0 |  |  |  |  |  |
Plaintiff motion for attorney's fees, amount |  |  |  |  | $ 5.1 |  |  |
Attorney fees awarded | $ 3.9 |  |  |  |  |  |  |
Ramirez v. Jack in the Box Inc. | Judicial Ruling | Maximum |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Damages awarded |  | 15.4 |  |  |  |  |  |
Ramirez v. Jack in the Box Inc. | Judicial Ruling | Minimum |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Damages awarded |  | $ 3.2 |  |  |  |  |  |

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