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Acquisitions (Aimia Acquisition) - Additional Information (Detail) (Aimia Foods Holdings Limited [Member]) In Millions, unless otherwise specified	0 Months Ended		1 Months Ended		3 Months Ended
	Sep. 15, 2014 USD ($)	Sep. 15, 2014 GBP (£)	May 31, 2014 USD ($)	May 31, 2014 GBP (£)	Apr. 04, 2015 USD ($)	Apr. 04, 2015 GBP (£)	May 30, 2014 GBP (£)	Apr. 04, 2015 Income Approach Valuation Technique [Member] USD ($)	May 30, 2014 Income Approach Valuation Technique [Member] GBP (£)
Business Acquisition [Line Items]
Acquisition Date					May 30, 2014	May 30, 2014
Acquired Segment			100.00%	100.00%
Contingent consideration			$ 23.7	£ 16.0	$ 23.7	£ 16.0	£ 16.0
Aggregate purchase price			87.6	52.1
Deferred consideration	33.5	19.9	33.5
Fair Value of Contingent Consideration			$ 17.9		$ 15.7	£ 10.6		$ 10.6	£ 15.7