Segment Reporting - Revenues by Channel Reporting Segment (Detail) - USD ($) $ in Millions	3 Months Ended		15 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Mar. 30, 2019
Segment Reporting Information [Line Items]
Revenue, net	$ 574.1	$ 560.8
Home And Office Bottled Water Delivery
Segment Reporting Information [Line Items]
Revenue, net	258.6	245.5	$ 16.6
Coffee and tea services
Segment Reporting Information [Line Items]
Revenue, net	167.2	163.2
Retail
Segment Reporting Information [Line Items]
Revenue, net	70.9	66.6
Other
Segment Reporting Information [Line Items]
Revenue, net	77.4	85.5	(16.6)
Operating Segments | Route Based Services
Segment Reporting Information [Line Items]
Revenue, net	420.5	398.1
Operating Segments | Route Based Services | Home And Office Bottled Water Delivery
Segment Reporting Information [Line Items]
Revenue, net	258.6	245.5
Operating Segments | Route Based Services | Coffee and tea services
Segment Reporting Information [Line Items]
Revenue, net	48.6	47.0
Operating Segments | Route Based Services | Retail
Segment Reporting Information [Line Items]
Revenue, net	70.9	66.6
Operating Segments | Route Based Services | Other
Segment Reporting Information [Line Items]
Revenue, net	42.4	39.0
Operating Segments | Coffee, Tea and Extract Solutions
Segment Reporting Information [Line Items]
Revenue, net	148.0	146.1
Operating Segments | Coffee, Tea and Extract Solutions | Home And Office Bottled Water Delivery
Segment Reporting Information [Line Items]
Revenue, net	0.0	0.0
Operating Segments | Coffee, Tea and Extract Solutions | Coffee and tea services
Segment Reporting Information [Line Items]
Revenue, net	120.2	117.2
Operating Segments | Coffee, Tea and Extract Solutions | Retail
Segment Reporting Information [Line Items]
Revenue, net	0.0	0.0
Operating Segments | Coffee, Tea and Extract Solutions | Other
Segment Reporting Information [Line Items]
Revenue, net	27.8	28.9
Operating Segments | All Other
Segment Reporting Information [Line Items]
Revenue, net	7.2	17.7
Operating Segments | All Other | Home And Office Bottled Water Delivery
Segment Reporting Information [Line Items]
Revenue, net	0.0	0.0
Operating Segments | All Other | Coffee and tea services
Segment Reporting Information [Line Items]
Revenue, net	0.0	0.0
Operating Segments | All Other | Retail
Segment Reporting Information [Line Items]
Revenue, net	0.0	0.0
Operating Segments | All Other | Other
Segment Reporting Information [Line Items]
Revenue, net	7.2	17.7
Eliminations
Segment Reporting Information [Line Items]
Revenue, net	(1.6)	(1.1)
Eliminations | Home And Office Bottled Water Delivery
Segment Reporting Information [Line Items]
Revenue, net	0.0	0.0
Eliminations | Coffee and tea services
Segment Reporting Information [Line Items]
Revenue, net	(1.6)	(1.0)
Eliminations | Retail
Segment Reporting Information [Line Items]
Revenue, net	0.0	0.0
Eliminations | Other
Segment Reporting Information [Line Items]
Revenue, net	0.0	(0.1)
Eliminations | Coffee, Tea and Extract Solutions
Segment Reporting Information [Line Items]
Revenue, net	$ 1.6	$ 1.1
U.S. Route Based | Retail
Segment Reporting Information [Line Items]
Revenue, net			(3.5)
U.S. Route Based | Other
Segment Reporting Information [Line Items]
Revenue, net			$ 3.5