Quarterly Financial Information (Unaudited) - Schedule of Quarterly Financial Information (Unaudited) (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Quarterly Financial Information Disclosure [Abstract]
Revenue, net	$ 571.3	$ 580.9	$ 580.6	$ 536.9	$ 521.2	$ 476.7	$ 320.2	$ 305.1	$ 2,269.7	$ 1,623.2	$ 1,187.3
Cost of sales	292.3	288.1	293.5	268.1	262.7	229.0	141.1	140.3	1,142.0	773.1	536.8
Gross profit	279.0	292.8	287.1	268.8	258.5	247.7	179.1	164.8	1,127.7	850.1	650.5
SG&A expenses	264.9	262.8	260.0	255.0	258.5	225.3	163.0	159.4	1,042.7	806.2	608.4
Loss on disposal of property, plant & equipment, net	5.4	(0.4)	3.9	1.3	2.0	1.4	1.4	1.8	10.2	6.6	4.2
Acquisition and integration expenses	8.7	3.2	6.7	7.3	7.3	7.4	11.7	1.4	25.9	27.8	20.0
Operating income		27.2	16.5	5.2	(9.3)	13.6	3.0	2.2	48.9	9.5	17.9
Net (loss) income from continuing operations	9.5	1.6	(4.5)	(10.2)	(54.7)	(4.0)	(3.0)	1.4	(3.6)	(60.3)	15.7
Net (loss) income from discontinued operations, net of income taxes	9.7	43.0	(17.8)	(24.2)	(23.2)	2.9	11.9	(2.8)	10.7	(11.2)	4.9
Less: Net income attributable to non-controlling interests - discontinued operations	2.1	2.1	2.3	2.0	1.9	1.5	1.5	1.4	8.5	6.3	6.1
Net (loss) income attributable to Cott Corporation	$ 17.1	$ 42.5	$ (24.6)	$ (36.4)	$ (79.8)	$ (2.6)	$ 7.4	$ (2.8)	$ (1.4)	$ (77.8)	$ (3.4)
Basic:
Continuing operations	$ 0.07	$ 0.01	$ (0.03)	$ (0.07)	$ (0.40)	$ (0.03)	$ (0.02)	$ 0.01	$ (0.03)	$ (0.47)	$ (0.02)
Discontinued operations	0.05	0.29	(0.15)	(0.19)	(0.18)	0.01	0.08	(0.03)	0.02	(0.14)	(0.01)
Net (loss) income	$ 0.12	$ 0.30	$ (0.18)	$ (0.26)	$ (0.58)	$ (0.02)	$ 0.06	$ (0.02)	$ (0.01)	$ (0.61)	$ (0.03)
Diluted:
Revenue, net	$ 571.3	$ 580.9	$ 580.6	$ 536.9	$ 521.2	$ 476.7	$ 320.2	$ 305.1	$ 2,269.7	$ 1,623.2	$ 1,187.3
Cost of sales	292.3	288.1	293.5	268.1	262.7	229.0	141.1	140.3	1,142.0	773.1	536.8
Gross profit	279.0	292.8	287.1	268.8	258.5	247.7	179.1	164.8	1,127.7	850.1	650.5
SG&A expenses	264.9	262.8	260.0	255.0	258.5	225.3	163.0	159.4	1,042.7	806.2	608.4
Loss on disposal of property, plant and equipment, net	5.4	(0.4)	3.9	1.3	2.0	1.4	1.4	1.8	10.2	6.6	4.2
Acquisition and integration expenses	8.7	3.2	6.7	7.3	7.3	7.4	11.7	1.4	25.9	27.8	20.0
Operating income (loss)		27.2	16.5	5.2	(9.3)	13.6	3.0	2.2	48.9	9.5	17.9
Net income (loss) from continuing operations	9.5	1.6	(4.5)	(10.2)	(54.7)	(4.0)	(3.0)	1.4	(3.6)	(60.3)	15.7
Net (loss) income from discontinued operations, net of income taxes	9.7	43.0	(17.8)	(24.2)	(23.2)	2.9	11.9	(2.8)	10.7	(11.2)	4.9
Less: Net income attributable to non-controlling interests - discontinued operations	2.1	2.1	2.3	2.0	1.9	1.5	1.5	1.4	8.5	6.3	6.1
Net (loss) income attributable to Cott Corporation	$ 17.1	$ 42.5	$ (24.6)	$ (36.4)	$ (79.8)	$ (2.6)	$ 7.4	$ (2.8)	$ (1.4)	$ (77.8)	$ (3.4)
Continuing operations	$ 0.07	$ 0.01	$ (0.03)	$ (0.07)	$ (0.40)	$ (0.03)	$ (0.02)	$ 0.01	$ (0.03)	$ (0.47)	$ (0.02)
Discontinued operations	0.05	0.29	(0.15)	(0.19)	(0.18)	0.01	0.08	(0.03)	0.02	(0.14)	(0.01)
Net (loss) income	$ 0.12	$ 0.30	$ (0.18)	$ (0.26)	$ (0.58)	$ (0.02)	$ 0.06	$ (0.02)	$ (0.01)	$ (0.61)	$ (0.03)