Description of Business and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	2 Months Ended	3 Months Ended		7 Months Ended	9 Months Ended	0 Months Ended
	Feb. 14, 2014	Sep. 28, 2014 Country State	Sep. 29, 2013	Sep. 28, 2014 Country State	Sep. 29, 2013	Aug. 25, 2014 Variable Interest Entity, Primary Beneficiary [Member]
Accounting Policies [Abstract]
Number of States in which Entity Operates		47		47
Number of foreign countries in which Entity operates		11		11
Related Party Transaction [Line Items]
Gross proceeds						$ 12.1
Contributions from franchisees to advertising and media funds	$ 0.4	$ 0.6	$ 0.6	$ 1.5	$ 2.0