Income Taxes - Deferred Income Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Dec. 29, 2018	Dec. 30, 2017
Deferred tax assets
Capital loss carryforwards	$ 49.9
Deferred tax assets, gross		$ 3.8
Continued Operations
Deferred tax assets
Net operating loss carryforwards	109.8	181.6
Capital loss carryforwards	13.1	4.5
Liabilities and reserves	25.0	35.7
Stock options	8.1	7.0
Inventories	3.8	4.5
Interest expense	12.2	25.4
Outside basis differences on discontinued operations	0.0	3.8
Other	6.7	4.9
Deferred tax assets, gross	178.7	267.4
Deferred tax liabilities
Property, plant and equipment	(65.7)	(69.2)
Intangible assets	(139.2)	(165.2)
Deferred tax liabilities	(204.9)	(234.4)
Valuation allowance	(98.0)	(129.1)
Net deferred tax liability	$ (124.2)	$ (96.1)