Income Taxes - Narrative (Detail) $ in Millions	12 Months Ended
	Dec. 27, 2019 USD ($) jurisdiction	Dec. 28, 2018 USD ($)
Income Tax Contingency [Line Items]
Increased (decrease) in valuation allowance	$ 31.6	$ 34.7
Pension and other postretirement benefit plans, tax	1.0
Undistributed earnings of foreign subsidiaries	1,550.1
Federal and foreign tax operating loss carry-forwards	1,200.6
Accrual for uncertain tax positions, that, if recognized would affect the effective income tax rate	5.0	4.2
Interest on income taxes accrued	$ 1.4	$ 1.3
Foreign Tax Authority [Member]
Income Tax Contingency [Line Items]
Number of jurisdictions under examination | jurisdiction	2
Estimate of possible loss	$ 157.9