Business Combination (Narrative) (Details) - USD ($)		3 Months Ended	12 Months Ended
	Mar. 08, 2022	Jul. 10, 2022	Sep. 29, 2024	Oct. 01, 2023	Oct. 02, 2022	Jun. 09, 2024
Business Acquisition [Line Items]
Consideration transferred			$ 86,000	$ 0	$ 297,000
Acquisition related costs			31,000	0	0
Goodwill			161,209,000	329,986,000	366,821,000
Del Taco
Business Acquisition [Line Items]
Goodwill			25,382,000	193,959,000	230,722,000	$ 194,000,000
Revenues		$ 316,900,000
Net earnings		$ 6,500,000
Jack in the Box
Business Acquisition [Line Items]
Goodwill			$ 135,827,000	$ 136,027,000	$ 136,099,000
Del Taco
Business Acquisition [Line Items]
Consideration transferred	$ 593,309,000
Business acquisition, transaction costs	7,141,000
Vesting period					1 year
Acquisition related costs					$ 12,300,000
Goodwill	319,700,000				$ 319,722,000
Goodwill, expected tax deductible amount	0
Sublease liability	$ 6,000,000
Sublease useful life	15 years
Del Taco | Del Taco
Business Acquisition [Line Items]
Ownership acquired	100.00%
Del Taco | Common Stock
Business Acquisition [Line Items]
Conversion of shares into cash (in dollars per share)	$ 12.51
Del Taco | Syndicated Credit Facility | Del Taco
Business Acquisition [Line Items]
Repayments of debt	$ 115,219,000