Income Tax Expense (Benefit) - Deferred Income Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Jan. 02, 2016
Deferred tax assets
Net operating loss carryforwards	$ 227.8	$ 132.8
Capital loss carryforwards	1.6	0.6
Liabilities and reserves	44.8	39.4
Stock options	5.8	5.9
Inventories	5.2	4.9
Other	8.8	9.1
Deferred tax assets, gross	294.0	192.7
Deferred tax liabilities
Property, plant & equipment	(106.2)	(99.8)
Intangible assets	(215.5)	(146.4)
Deferred tax liabilities	(321.7)	(246.2)
Valuation allowance	(129.9)	(15.4)
Net deferred tax liability	$ (157.6)	$ (68.9)