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Summary of Refranchisings and Franchise Acquisition (Summary Of Refranchisings And Franchise Acquisitions) (Details) $ in Thousands | 12 Months Ended
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Sep. 28, 2025 USD ($) restaurant | Sep. 29, 2024 USD ($) restaurant | Oct. 01, 2023 USD ($) restaurant
Summary Of Refranchisings, Franchisee Development And Acquisitions [Line Items] |  |  |
Proceeds from the sale of company-operated restaurants | $ 6,384 | $ 19,400 | $ 85,221
Goodwill related to the sale of company-operated restaurants |  | (5,544) |
Gains on the sale of company-operated restaurants | (2,161) | (185) | 8,171
Impairment of trademark | (4,384) | (8,008) | (4,569)
Del Taco |  |  |
Summary Of Refranchisings, Franchisee Development And Acquisitions [Line Items] |  |  |
Goodwill related to the sale of company-operated restaurants |  | (5,544) |
Impairment of trademark | $ (2,400) | $ (2,600) | $ (4,400)
Entity Operated Units |  |  |
Summary Of Refranchisings, Franchisee Development And Acquisitions [Line Items] |  |  |
Restaurants sold to Jack in the Box franchisees | restaurant | 1 | 0 | 5
Proceeds from the sale of company-operated restaurants | $ 6,384 | $ 19,400 | $ 85,221
Broker commissions | 0 | 0 | (1,614)
Net assets sold (primarily property and equipment) | (1,883) | (5,310) | (17,101)
Goodwill related to the sale of company-operated restaurants | (461) | (6,835) | (35,544)
Franchise fees | (364) | (1,266) | (3,086)
Sublease liabilities, net | 0 | (140) | (8,559)
Lease termination | (217) | (225) | (393)
Other | (216) | (2,369) | (926)
Gains on the sale of company-operated restaurants | 3,243 | 3,255 | 17,998
Proceeds from the extension of franchise and lease agreements from the sale of restaurants in prior years | $ 700 | 1,500 | $ 900
Impairment of trademark |  | $ 2,200 |
Entity Operated Units | Del Taco |  |  |
Summary Of Refranchisings, Franchisee Development And Acquisitions [Line Items] |  |  |
Restaurants sold to Jack in the Box franchisees | restaurant | 13 | 47 | 111

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