Hedging Transactions and Derivative Financial Instruments - Summary of Fair Value of the Aluminum Swap Assets and Liabilities (Detail) - USD ($) $ in Millions	Jul. 04, 2015	Jan. 03, 2015
Derivative [Line Items]
Aluminum swap assets	$ 1.4	$ 1.2
Net asset (liability)	1.4	1.2
Aluminum Swaps [Member]
Derivative [Line Items]
Aluminum swap assets		0.2
Aluminum swap liabilities	0.0	0.0
Net asset (liability)		0.2
Aluminum swap assets		0.2
Aluminum swap liabilities	(5.8)	(2.5)
Net asset (liability)	$ (5.8)	$ (2.3)