Discontinued Operations - Major Components of Net Income (Loss) from Discontinued Operations, Net of Income Taxes in Consolidated Statements of Operations (Detail) - USD ($) $ 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
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net income (loss) 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
Net income (loss) attributable to Cott Corporation - discontinued operations									2.2	(17.5)	(1.2)
Discontinued Operations, Disposed of by Sale [Member] | Traditional CSD and Juice Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue, net									1,637.1	1,658.6	1,799.6
Cost of sales									1,428.4	1,434.5	1,554.6
Operating income from discontinued operations									49.9	72.7	81.5
Loss from discontinued operations, before income taxes									(20.5)	(6.8)	(2.7)
Income tax (benefit) expense									(31.2)	4.4	(7.6)
Net income (loss) from discontinued operations, net of income taxes									10.7	(11.2)	4.9
Less: Net income attributable to non-controlling interests									8.5	6.3	6.1
Net income (loss) attributable to Cott Corporation - discontinued operations									$ 2.2	$ (17.5)	$ (1.2)