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Other Operating Expense (Income), Net (Impairment and Disposal Costs Included in Impairment and Other Charges) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 28, 2025	Sep. 29, 2024	Oct. 01, 2023
Impaired Long-Lived Assets Held and Used [Line Items]
Operating restaurant impairment charges	$ 4,384	$ 8,008	$ 4,569
Restructuring Costs	7,298	15,631	9,112
Costs of closed restaurants and other	8,467	2,975	4,786
Accelerated depreciation	99	699	541
Gains on acquisition of restaurants	(6)	(2,702)	0
Gains on disposition of property and equipment, net	2,161	185	(8,171)
Impairment and other charges, net	22,403	24,796	10,837
Jack in the Box
Impaired Long-Lived Assets Held and Used [Line Items]
Operating restaurant impairment charges	1,900	5,400
Del Taco
Impaired Long-Lived Assets Held and Used [Line Items]
Operating restaurant impairment charges	$ 2,400	$ 2,600	$ 4,400

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Amount of accelerated depreciation recognized in the period due to a long-lived asset being replaced or disposed of prior to the end of its useful life. Not associated with a disposal group or restructuring.

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