Acquisition - Additional Information (Detail) € in Millions, AUD in Millions, $ in Millions	3 Months Ended		6 Months Ended			12 Months Ended
	May 31, 2017 USD ($)	Aug. 31, 2016 USD ($)	May 31, 2017 EUR (€)	May 31, 2017 USD ($)	May 31, 2016 USD ($)	Nov. 30, 2016 USD ($)	Feb. 28, 2015 AUD	May 31, 2017 USD ($)	Nov. 30, 2015 USD ($)	May 31, 2015 EUR (€)	May 31, 2015 USD ($)
Business Acquisition [Line Items]
Business acquisition valuation of assets allocated to goodwill					$ 1,837.1	$ 1,771.4		$ 1,894.8
Contingent consideration related to acquisition			€ 26.1		29.6	28.9		$ 29.3	$ 27.1	€ 25.2	$ 27.7
Payments to Acquire Interest in Joint Venture				$ 1.2	0.0
Kohinoor Specialty Foods [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired			15.00%					15.00%
Business Combination, Consideration Transferred				113.0
Payments to Acquire Businesses, Net of Cash Acquired				1.6
Payments to Acquire Interest in Joint Venture				1.2
Cumulative Effect on Retained Earnings, before Tax				0.6
Gourmet Garden [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets								$ 27.6
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, definite lived intangible assets				$ 4.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles								18.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets, Total								16.0
business combinations, final goodwill adjustments								7.6
Business acquisition valuation of assets allocated to goodwill								53.7
Finite-Lived Intangible Asset, Useful Life			14 years 2 months	14 years 2 months
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, tangible assets				$ 4.4
Business Acquisition, Pro Forma Revenue | AUD							AUD 70
Cash Acquired from Acquisition					$ 3.3
Proceeds from Previous Acquisition		$ 1.9
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, indefinite lived intangible assets				7.3
Payments to Acquire Businesses, Net of Cash Acquired						$ 116.2
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual	$ 15.9			$ 32.5
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								1.3
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 | €			€ 53.0
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	$ 18.5			$ 29.6