Discontinued Operations - Summary of Discontinued Operations in Financial Statements (Details) - USD ($) $ 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
Statement of Operations
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
Net income (loss) attributable to Cott Corporation – discontinued operations									3.0	354.0	2.2
Income tax expense (benefit)									9.5	(4.8)	(30.0)
Interest on short-term debt									4.8	0.0	0.0
Discontinued Operations, Disposed of by Sale | Traditional CSD and Juice Business
Statement of Operations
Revenue, net									0.0	111.2	1,637.1
Cost of sales									0.0	98.4	1,428.4
Operating income from discontinued operations									0.0	2.0	49.9
Gain on sale of discontinued operations									0.0	427.9	0.0
Income (loss) from discontinued operations, before income taxes									0.0	402.5	(20.5)
Income tax (benefit) expense									(3.0)	47.9	(31.2)
Net income from discontinued operations, net of income taxes									3.0	354.6	10.7
Less: Net income attributable to non-controlling interests									0.0	0.6	8.5
Net income (loss) attributable to Cott Corporation – discontinued operations									$ 3.0	354.0	2.2
Income tax expense (benefit)										(35.1)
Interest on short-term debt										$ 3.4	$ 49.5