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Acquisition - Additional Information (Detail)
€ in Millions, AUD in Millions, $ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Feb. 28, 2017
EUR (€)
Feb. 28, 2017
USD ($)
May 31, 2016
USD ($)
Nov. 30, 2016
USD ($)
Feb. 28, 2015
AUD
Feb. 29, 2016
USD ($)
Nov. 30, 2015
USD ($)
May 31, 2015
USD ($)
Business Acquisition [Line Items]                
Business acquisition valuation of assets allocated to goodwill   $ 1,857.6   $ 1,771.4   $ 1,764.0    
Contingent consideration related to acquisition   29.3   28.9   $ 28.4 $ 27.1 $ 27.7
Gourmet Garden [Member]                
Business Acquisition [Line Items]                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets   20.3            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles   14.2            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets, Total   20.4            
Business acquisition valuation of assets allocated to goodwill   $ 61.3            
Finite-Lived Intangible Asset, Useful Life 12 years 12 years            
Business Acquisition, Pro Forma Revenue | AUD         AUD 70      
Cash Acquired from Acquisition     $ 3.3          
Payments to Acquire Businesses, Net of Cash Acquired       $ 116.2        
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual   $ 16.6            
Giotti [Member]                
Business Acquisition [Line Items]                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets   9.8            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles   38.0            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets, Total   2.5            
Business acquisition valuation of assets allocated to goodwill   74.9            
Business Acquisition, Transaction Costs   $ 2.1            
Finite-Lived Intangible Asset, Useful Life 11 years 11 months 11 years 11 months            
Business Acquisition, Pro Forma Revenue | € € 53              
Cash Acquired from Acquisition   $ 1.2            
Payments to Acquire Businesses, Net of Cash Acquired   124.0            
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual   $ 11.1