Description of Business and Summary of Significant Accounting Policies - Additional Information (Detail) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 27, 2015 USD ($)	Oct. 02, 2016 USD ($) Country State	Sep. 27, 2015 USD ($)
Accounting Policies [Abstract]
Number of States in which Entity Operates | State		47
Number of foreign countries in which Entity operates | Country		12
Related Party Transaction [Line Items]
Mergerrelatedlitigationcostsreclassifiedinpriorperiod	$ 1.5		$ 3.6
Contributions from franchisees to advertising and media funds		$ 1.7	$ 1.6