Stock Based Compensation - Expense Included in Selling, General and Administrative Expenses Related to Stock Options and Restricted Stock Awards (Detail) - Selling, General and Administrative Expenses - USD ($) $ in Millions	12 Months Ended
	Jan. 01, 2016	Dec. 26, 2014	Dec. 27, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 16.8	$ 12.4	$ 9.9
Stock options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	3.9	5.2	6.8
RSUs/PSUs
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	12.2	6.5	2.4
RSAs
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 0.7	$ 0.7	$ 0.7