Acquisition - Additional Information (Detail) € in Millions, AUD in Millions, $ in Millions	3 Months Ended		6 Months Ended		9 Months Ended	12 Months Ended
	May 31, 2016 USD ($)	Feb. 29, 2016 USD ($)	May 31, 2016 USD ($)	May 31, 2015 USD ($)	Aug. 31, 2015 USD ($)	Nov. 30, 2015 USD ($)	Feb. 28, 2015 AUD	Feb. 28, 2015 EUR (€)	Feb. 28, 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		$ 1,837.1			$ 1,759.3					$ 1,719.8
Contingent consideration related to acquisition	29.6		29.6			27.1					27.7
Gourmet Garden [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred			118.1
Business Acquisition, Pro Forma Revenue | AUD							AUD 70
Business acquisition valuation of assets allocated to goodwill	63.2		63.2
Business Combination, Acquisition Related Costs	2.4		3.0
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual	7.4		7.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets, Total	20.4		20.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	20.3		20.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	14.2		$ 14.2
Finite-Lived Intangible Asset, Useful Life			12 years
Brand Aromatics [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred				$ 62.4
Business Acquisition, Pro Forma Revenue									$ 30.0
Business acquisition valuation of assets allocated to goodwill						34.3
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual		$ 7.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets, Total						5.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets						4.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles						$ 18.7
Finite-Lived Intangible Asset, Useful Life						11 years 11 months
D&A [Member]
Business Acquisition [Line Items]
Cash Acquired from Acquisition				2.8
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High | €										€ 35
Business Acquisition, Pro Forma Revenue | €								€ 50
Payments to Acquire Businesses, Net of Cash Acquired				49.0
Business acquisition valuation of assets allocated to goodwill	41.1		$ 41.1
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual	17.2		31.8
Contingent consideration related to acquisition										€ 25	$ 27.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets, Total	3.2		3.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	12.6		12.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	19.8		$ 19.8
Finite-Lived Intangible Asset, Useful Life			13 years 10 months
Stubbs [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred					$ 99.4
Business Acquisition, Pro Forma Revenue				$ 30.0
Business acquisition valuation of assets allocated to goodwill	80.6		$ 80.6
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual	9.4		14.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets, Total	5.4		5.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	12.4		12.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	13.3		13.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 12.5		$ 12.5
Finite-Lived Intangible Asset, Useful Life						14 years 4 months