Introduction and Basis of Presentation (Details)	3 Months Ended		9 Months Ended
	Sep. 25, 2013 restaurant	Sep. 26, 2012 restaurant	Sep. 25, 2013 restaurant	Sep. 26, 2012 restaurant
Entity and franchisee unit activity [Roll Forward]
Units, end of period	1,686	1,687	1,686	1,687
Company restaurants [Member]
Entity and franchisee unit activity [Roll Forward]
Units, beginning of period	165	177	164	206
Units opened	0	0	0	0
Units acquired from franchisees	1	0	2	0
Units sold to franchisees	(2)	(5)	(2)	(28)
Units closed	0	(1)	0	(7)
Units, end of period	164	171	164	171
Franchised and licensed restaurants [Member]
Entity and franchisee unit activity [Roll Forward]
Units, beginning of period	1,525	1,507	1,524	1,479
Units opened	9	12	27	27
Units purchased from Company	2	5	2	28
Units acquired by Company	(1)	0	(2)	0
Units closed	(13)	(8)	(29)	(18)
Units, end of period	1,522	1,516	1,522	1,516