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Summary Of Refranchisings, Franchisee Development And Acquisitions (Purchase Price Allocations On Franchise Acquisitions) (Details) - restaurant	6 Months Ended
	Apr. 10, 2016	Apr. 12, 2015
Jack in the box brand restaurant operations [Member]
Summary Of Refranchisings, Franchisee Development And Acquisitions [Line Items]
Significant Changes, Franchises Purchased During Period	1	6

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- Definition

Summary Of Refranchisings, Franchisee Development And Acquisitions [Line Items].

+ References

No definition available.

+ Details

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- Definition

The number of franchises purchased during the period when there are significant changes in franchisor-owned outlets or franchised outlets during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 952
-SubTopic 605
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=51665471&loc=d3e68639-108044

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