- Business Combination Transfer Consideration (Detail) - USD ($) $ in Millions		1 Months Ended
	Oct. 15, 2018	Feb. 28, 2019	Oct. 31, 2018	Mar. 31, 2018	Dec. 28, 2019	Mar. 21, 2018
Mountain Valley
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
Working capital settlement	(0.4)	$ (0.4)
Total consideration	80.0		$ 80.4
Total consideration	$ 80.4				$ 80.0
Crystal rock 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
Total consideration				$ 21.5	$ 21.5	$ 21.5