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Introduction and Basis of Presentation (Details)	3 Months Ended		9 Months Ended
Introduction and Basis of Presentation (Details)	Sep. 26, 2012	Sep. 28, 2011	Sep. 26, 2012	Sep. 28, 2011
Entity and franchisee unit activity [Abstract]
Units, end of period	1,687	1,677	1,687	1,677
Franchised/licensed restaurants [Member]
Entity and franchisee unit activity [Abstract]
Units, beginning of period	1,507	1,452	1,479	1,426
Units opened	12	9	27	39
Units relocated	0	0	0	1
Units purchased from Company	5	3	28	13
Units closed	(8)	(10)	(18)	(25)
Units, end of period	1,516	1,454	1,516	1,454
Entity owned restaurants [Member]
Entity and franchisee unit activity [Abstract]
Units, beginning of period	177	225	206	232
Units opened	0	2	0	8
Units sold to franchisees	(5)	(3)	(28)	(13)
Units closed	(1)	(1)	(7)	(4)
Units, end of period	171	223	171	223