Segment Reporting - Revenues by Channel Reporting Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Segment Reporting Information [Line Items]
Total	$ 2,073.3	$ 1,953.5	$ 1,795.4
Water Direct/Water Exchange
Segment Reporting Information [Line Items]
Total	1,276.5	1,177.4	1,157.8
Water Refill/Water Filtration
Segment Reporting Information [Line Items]
Total	213.4	204.4	62.4
Other Water
Segment Reporting Information [Line Items]
Total	244.3	224.2	217.2
Water Dispensers
Segment Reporting Information [Line Items]
Total	65.4	75.9
Other
Segment Reporting Information [Line Items]
Total	273.7	271.6	358.0
Operating Segments | North America
Segment Reporting Information [Line Items]
Total	1,562.9	1,493.2	1,269.8
Operating Segments | North America | Water Direct/Water Exchange
Segment Reporting Information [Line Items]
Total	1,051.0	965.8	905.1
Operating Segments | North America | Water Refill/Water Filtration
Segment Reporting Information [Line Items]
Total	180.5	175.1	35.6
Operating Segments | North America | Other Water
Segment Reporting Information [Line Items]
Total	162.6	160.7	157.8
Operating Segments | North America | Water Dispensers
Segment Reporting Information [Line Items]
Total	65.4	75.9
Operating Segments | North America | Other
Segment Reporting Information [Line Items]
Total	103.4	115.7	171.3
Operating Segments | Rest of World
Segment Reporting Information [Line Items]
Total	510.4	460.3	518.4
Operating Segments | Rest of World | Water Direct/Water Exchange
Segment Reporting Information [Line Items]
Total	225.5	211.6	252.7
Operating Segments | Rest of World | Water Refill/Water Filtration
Segment Reporting Information [Line Items]
Total	32.9	29.3	26.8
Operating Segments | Rest of World | Other Water
Segment Reporting Information [Line Items]
Total	81.7	63.5	59.4
Operating Segments | Rest of World | Water Dispensers
Segment Reporting Information [Line Items]
Total	0.0	0.0
Operating Segments | Rest of World | Other
Segment Reporting Information [Line Items]
Total	170.3	155.9	179.5
All Other
Segment Reporting Information [Line Items]
Total	0.0	0.0	7.2
All Other | Water Direct/Water Exchange
Segment Reporting Information [Line Items]
Total	0.0	0.0	0.0
All Other | Water Refill/Water Filtration
Segment Reporting Information [Line Items]
Total	0.0	0.0	0.0
All Other | Other Water
Segment Reporting Information [Line Items]
Total	0.0	0.0	0.0
All Other | Water Dispensers
Segment Reporting Information [Line Items]
Total	0.0	0.0
All Other | Other
Segment Reporting Information [Line Items]
Total	$ 0.0	$ 0.0	$ 7.2