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Other Operating Expense (Income), Net (Narrative) (Details) $ in Thousands	12 Months Ended
	Sep. 29, 2024 USD ($)	Oct. 01, 2023 USD ($)	Oct. 02, 2022 USD ($) restaurant
Restructuring Cost and Reserve [Line Items]
Operating restaurant impairment charges	$ 8,008	$ 4,569	$ 5,927
Jack in the Box
Restructuring Cost and Reserve [Line Items]
Number of Restaurants | restaurant			9
Jack in the Box | Jack In The Box Restaurants
Restructuring Cost and Reserve [Line Items]
Operating restaurant impairment charges	1,200
Jack in the Box | Jack In The Box Restaurants
Restructuring Cost and Reserve [Line Items]
Operating restaurant impairment charges	3,400
Del Taco
Restructuring Cost and Reserve [Line Items]
Operating restaurant impairment charges	$ 2,600	$ 4,400

X

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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