Other Operating Expense (Income), Net (Narrative) (Details) $ in Thousands	12 Months Ended
	Oct. 01, 2023 USD ($) restaurant	Oct. 02, 2022 USD ($)	Oct. 03, 2021 USD ($)
Restructuring Cost and Reserve [Line Items]
Operating restaurant impairment charges	$ 4,569	$ 5,927	$ 0
Jack in the Box
Restructuring Cost and Reserve [Line Items]
Number of restaurants | restaurant	9
Sale Of Related Markets
Restructuring Cost and Reserve [Line Items]
Operating restaurant impairment charges	$ 4,400	3,200
Early Termination Of Contract
Restructuring Cost and Reserve [Line Items]
Operating restaurant impairment charges		$ 2,700