Segment Reporting - Revenues by Channel Reporting Segment (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Segment Reporting Information [Line Items]
Revenue, net	$ 603.6	$ 580.6	$ 1,164.4	$ 1,117.5
Home and office bottled water delivery
Segment Reporting Information [Line Items]
Revenue, net	259.5	244.6	488.4	462.6
Coffee and tea services
Segment Reporting Information [Line Items]
Revenue, net	166.3	174.5	329.5	340.7
Retail
Segment Reporting Information [Line Items]
Revenue, net	77.9	66.2	148.0	129.7
Other
Segment Reporting Information [Line Items]
Revenue, net	99.9	95.3	198.5	184.5
Operating Segments | Route Based Services
Segment Reporting Information [Line Items]
Revenue, net	412.6	385.3	783.7	737.6
Operating Segments | Route Based Services | Home and office bottled water delivery
Segment Reporting Information [Line Items]
Revenue, net	259.5	244.6	488.4	462.6
Operating Segments | Route Based Services | Coffee and tea services
Segment Reporting Information [Line Items]
Revenue, net	48.1	44.8	94.4	90.7
Operating Segments | Route Based Services | Retail
Segment Reporting Information [Line Items]
Revenue, net	61.1	55.7	115.8	107.5
Operating Segments | Route Based Services | Other
Segment Reporting Information [Line Items]
Revenue, net	43.9	40.2	85.1	76.8
Operating Segments | Coffee, Tea and Extract Solutions
Segment Reporting Information [Line Items]
Revenue, net	145.5	153.5	291.6	296.8
Operating Segments | Coffee, Tea and Extract Solutions | Home and office bottled water delivery
Segment Reporting Information [Line Items]
Revenue, net	0.0	0.0	0.0	0.0
Operating Segments | Coffee, Tea and Extract Solutions | Coffee and tea services
Segment Reporting Information [Line Items]
Revenue, net	118.8	129.0	236.0	248.7
Operating Segments | Coffee, Tea and Extract Solutions | Retail
Segment Reporting Information [Line Items]
Revenue, net	0.0	0.0	0.0	0.0
Operating Segments | Coffee, Tea and Extract Solutions | Other
Segment Reporting Information [Line Items]
Revenue, net	26.7	24.5	55.6	48.1
Operating Segments | All Other
Segment Reporting Information [Line Items]
Revenue, net	47.0	41.8	91.7	83.1
Operating Segments | All Other | Home and office bottled water delivery
Segment Reporting Information [Line Items]
Revenue, net	0.0	0.0	0.0	0.0
Operating Segments | All Other | Coffee and tea services
Segment Reporting Information [Line Items]
Revenue, net	0.9	0.7	1.6	1.3
Operating Segments | All Other | Retail
Segment Reporting Information [Line Items]
Revenue, net	16.8	10.5	32.2	22.2
Operating Segments | All Other | Other
Segment Reporting Information [Line Items]
Revenue, net	29.3	30.6	57.9	59.6
Eliminations
Segment Reporting Information [Line Items]
Revenue, net	(1.5)	0.0	(2.6)	0.0
Eliminations | Home and office bottled water delivery
Segment Reporting Information [Line Items]
Revenue, net	0.0	0.0	0.0	0.0
Eliminations | Coffee and tea services
Segment Reporting Information [Line Items]
Revenue, net	(1.5)	0.0	(2.5)	0.0
Eliminations | Retail
Segment Reporting Information [Line Items]
Revenue, net	0.0	0.0	0.0	0.0
Eliminations | Other
Segment Reporting Information [Line Items]
Revenue, net	0.0	$ 0.0	(0.1)	$ 0.0
Eliminations | Coffee, Tea and Extract Solutions
Segment Reporting Information [Line Items]
Revenue, net	$ 1.5		$ 2.6