Basis Of Presentation (Details)	Jul. 07, 2013 restaurant	Jul. 08, 2012 restaurant
Jack In The Box [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants	2,255	2,247
Qdoba [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants	592	614
Company Operated [Member] | Jack In The Box [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants	526	586
Company Operated [Member] | Qdoba [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants	284	304
Franchised [Member] | Jack In The Box [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants	1,729	1,661
Franchised [Member] | Qdoba [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants	308	310