Income Taxes - Narrative (Detail) jurisdiction in Millions, $ in Millions	3 Months Ended	12 Months Ended
	Dec. 29, 2017 USD ($) subsidiaries	Dec. 29, 2017 USD ($) jurisdiction	Dec. 30, 2016 USD ($)
Income Tax Contingency [Line Items]
Increased (decrease) in valuation allowance		$ 25.0	$ 6.3
Pension and other postretirement benefit plans, tax		0.4
Undistributed earnings of foreign subsidiaries	$ 1,544.1	1,544.1
Federal and foreign tax operating loss carry-forwards	918.8	918.8
Accrual for uncertain tax positions, that, if recognized would affect the effective income tax rate	4.2	4.2	3.6
Interest on income taxes accrued	1.1	$ 1.1	$ 0.9
Change in tax rate, income tax expense	$ 2.1
Number or subsidiaries impacted by repatriation tax | subsidiaries	2
Foreign Tax Authority [Member]
Income Tax Contingency [Line Items]
Number of jurisdictions under examination | jurisdiction		0
Estimate of possible loss		$ 134.6