Quarterly Financial Information (unaudited) - Schedule of Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Quarterly Financial Information Disclosure [Abstract]
Revenue, net	$ 600.2	$ 616.1	$ 604.1	$ 574.1	$ 599.2	$ 609.3	$ 603.6	$ 560.8	$ 2,394.5	$ 2,372.9	$ 2,269.7
Cost of sales	294.6	289.9	291.0	291.2	309.0	298.8	302.2	287.3	1,166.7	1,197.3	1,142.0
Gross profit	305.6	326.2	313.1	282.9	290.2	310.5	301.4	273.5	1,227.8	1,175.6	1,127.7
Selling, general and administrative expenses	275.9	280.8	284.2	272.1	275.9	279.9	275.2	261.1	1,113.0	1,092.1	1,043.2
Loss on disposal of property, plant and equipment, net	2.9	1.1	1.6	1.9	5.6	1.2	1.3	1.3	7.5	9.4	10.2
Acquisition and integration expenses	6.7	2.7	2.7	4.8	4.5	1.6	4.2	5.0	16.9	15.3	30.4
Operating income	20.1	41.6	24.6	4.1	4.2	27.8	20.7	6.1	90.4	58.8	43.9
Net (loss) income from continuing operations	6.6	8.6	4.4	(19.7)	3.6	8.5	12.2	4.6	(0.1)	28.9	(3.6)
Net income from discontinued operations, net of income taxes	1.5	1.5	0.0	0.0	(2.9)	1.5	(1.4)	357.4	3.0	354.6	10.7
Less: Net income attributable to non-controlling interests - discontinued operations					0.0	0.0	0.0	0.6	0.0	0.6	8.5
Net income (loss) attributable to Cott Corporation	$ 8.1	$ 10.1	$ 4.4	$ (19.7)	$ 0.7	$ 10.0	$ 10.8	$ 361.4	$ 2.9	$ 382.9	$ (1.4)
Basic:
Continuing operations (In USD per share)	$ 0.05	$ 0.06	$ 0.03	$ (0.14)	$ 0.03	$ 0.06	$ 0.09	$ 0.03	$ 0	$ 0.21	$ (0.03)
Discontinued operations (In USD per share)	0.01	0.01	0	0	(0.02)	0.01	(0.01)	2.55	0.02	2.54	0.02
Net income (loss) (In USD per share)	0.06	0.07	0.03	(0.14)	0.01	0.07	0.08	2.58	0.02	2.75	(0.01)
Diluted:
Continuing operations (In USD per share)	0.05	0.06	0.03	(0.14)	0.03	0.06	0.09	0.03	0	0.21	(0.03)
Discontinued operations (In USD per share)	0.01	0.01	0	0	(0.02)	0.01	(0.01)	2.51	0.02	2.50	0.02
Net income (loss) (In USD per share)	$ 0.06	$ 0.07	$ 0.03	$ (0.14)	$ 0.01	$ 0.07	$ 0.08	$ 2.54	$ 0.02	$ 2.71	$ (0.01)