Income Taxes - Narrative (Detail) - USD ($) $ in Millions	12 Months Ended
	Jan. 01, 2016	Dec. 26, 2014
Income Tax Disclosure [Abstract]
Increased (decrease) in valuation allowance	$ 46.3	$ (0.9)
Pension and other postretirement benefit plans, tax	2.0
Federal and foreign tax operating loss carry-forwards	765.4
Accrual for uncertain tax positions, that, if recognized would affect the effective income tax rate	3.5	$ 3.0
Unrecognized tax benefits expected to reverse in next 12 months	0.7
Interest on income taxes accrued	$ 0.7