Acquisitions (Aimia Acquisition) - Additional Information (Detail) £ in Millions, $ in Millions					1 Months Ended		3 Months Ended		7 Months Ended	12 Months Ended
	Sep. 30, 2014 USD ($)	Sep. 30, 2014 GBP (£)	May 30, 2014 USD ($)	May 30, 2014 GBP (£)	Sep. 30, 2014 USD ($)	Sep. 30, 2014 GBP (£)	Oct. 01, 2016 USD ($)	Oct. 01, 2016 GBP (£)	Jan. 03, 2015 USD ($)	Dec. 31, 2016 USD ($)	Jan. 02, 2016 USD ($)	Jan. 03, 2015 USD ($)	May 31, 2014 GBP (£)	May 30, 2014 GBP (£)
Business Acquisition [Line Items]
Revenue										$ 3,798.0	$ 3,914.1	$ 3,099.1
Net income (loss)										$ (58.2)	$ (47.8)	$ (8.1)
Aimia Foods Holdings Limited [Member]
Business Acquisition [Line Items]
Acquisition Date										May 30, 2014	May 30, 2014
Percentage of share capital acquired			100.00%											100.00%
Contingent consideration maximum payable amount | £													£ 16.0	£ 16.0
Aggregate purchase price			$ 87.6	£ 52.1
Deferred consideration	$ 33.5	£ 19.9	33.5		$ 33.5	£ 19.9
Aggregate contingent consideration liability			17.9					£ 12.0						£ 10.6
Existing receivable			11.0					3.9
Final total cash payment			80.4				$ 10.8	£ 8.1
Purchase price consideration			$ 139.0
Revenue									$ 62.3
Net income (loss)									$ 2.3
Acquisition related costs										$ 2.2