Net Income (Loss) per Common Share - Reconciliation of Numerator and Denominators of Basic and Diluted Net Income Per Common Share (Detail) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014
Earnings Per Share [Line Items]
Net income (loss) attributed to Cott Corporation	$ 2.2	$ (5.9)	$ (3.8)	$ (10.0)
Accumulated dividends on convertible preferred shares	0.0	0.0	0.0	0.0
Foreign exchange impact on redemption of convertible preferred shares	0.0	0.0	0.0	0.0
Diluted net income (loss) attributed to Cott Corporation	$ 2.2	$ (5.9)	$ (3.8)	$ (10.0)
Weighted average number of shares outstanding - basic	99,573	94,234	96,384	94,276
Adjusted weighted average number of shares outstanding - diluted	100,165	94,234	96,384	94,276
Stock Options [Member]
Earnings Per Share [Line Items]
Dilutive effect of awards	176
Time-Based RSUs [Member]
Earnings Per Share [Line Items]
Dilutive effect of awards	416