Introduction and Basis of Presentation (Details)	3 Months Ended
	Mar. 26, 2014 restaurant	Mar. 27, 2013 restaurant
Entity and franchisee unit activity [Roll Forward]
Units, end of period	1,696	1,689
Company restaurants [Member]
Entity and franchisee unit activity [Roll Forward]
Units, beginning of period	163	164
Units opened	0	0
Units closed	(2)	0
Units, end of period	161	164
Franchised and licensed restaurants [Member]
Entity and franchisee unit activity [Roll Forward]
Units, beginning of period	1,537	1,524
Units opened	4	7
Units closed	(6)	(6)
Units, end of period	1,535	1,525