- Business Combination Transfer Consideration (Detail) - USD ($) $ in Millions			12 Months Ended
	Oct. 15, 2018	Mar. 21, 2018	Dec. 29, 2018
S&D Acquisition
Business Acquisition [Line Items]
Cash paid to sellers			$ 62.5
Cash paid on behalf of sellers for sellers' transaction expenses			1.8
Cash paid to retire outstanding debt on behalf of sellers			16.1
Total consideration	$ 80.4		80.4
Eden Acquisition
Business Acquisition [Line Items]
Cash paid to sellers			20.7
Cash paid on behalf of sellers for sellers' transaction expenses			0.8
Total consideration		$ 37.7	$ 21.5