Common Shares and Net (Loss) Income Per Common Share - Reconciliation of Numerator and Denominators of Basic and Diluted Net (Loss) Income Per Common Share (Detail) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Oct. 01, 2016	Oct. 03, 2015
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Diluted net (loss) income attributed to Cott Corporation	$ (3.9)	$ 4.8	$ 0.2	$ 1.0
Weighted average number of shares outstanding - basic	138,195	109,686	124,900	100,818
Adjusted weighted average number of shares outstanding - diluted	138,195	110,410	125,967	101,387
Time-Based RSUs [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Dilutive effect of awards		488	470	423
Stock Options [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Dilutive effect of awards		236	597	146