Acquisition - Additional Information (Detail) € in Millions, AUD in Millions, $ in Millions	3 Months Ended		6 Months Ended	9 Months Ended		12 Months Ended
	Aug. 31, 2016 USD ($)	Feb. 29, 2016 USD ($)	May 31, 2016 USD ($)	Aug. 31, 2016 USD ($)	Aug. 31, 2015 USD ($)	Nov. 30, 2015 USD ($)	Feb. 28, 2015 EUR (€)	Feb. 28, 2015 AUD	Feb. 28, 2015 USD ($)	Aug. 31, 2015 EUR (€)	Aug. 31, 2015 USD ($)
Business Acquisition [Line Items]
Business acquisition valuation of assets allocated to goodwill	$ 1,813.3			$ 1,813.3		$ 1,759.3					$ 1,802.4
Contingent consideration related to acquisition	30.1			30.1		27.1					27.7
Gourmet Garden [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred			$ 118.1	116.2
Cash received, working capital adjustment	1.9
Business Combination, Acquisition Related Costs	0.6			3.6
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
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets, Total	20.4			20.4
Business acquisition valuation of assets allocated to goodwill	61.3			$ 61.3
Finite-Lived Intangible Asset, Useful Life				12 years
Business Acquisition, Pro Forma Revenue | AUD								AUD 70
Cash Acquired from Acquisition			3.3
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual	14.1			$ 21.5
Brand Aromatics [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred					$ 62.4
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
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets, Total						5.2
Business acquisition valuation of assets allocated to goodwill						$ 34.3
Finite-Lived Intangible Asset, Useful Life						11 years 11 months
Business Acquisition, Pro Forma Revenue									$ 30.0
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual		$ 7.2
D&A [Member]
Business Acquisition [Line Items]
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
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets, Total	3.2			3.2
Business acquisition valuation of assets allocated to goodwill	41.1			$ 41.1
Finite-Lived Intangible Asset, Useful Life				13 years 10 months
Business Acquisition, Pro Forma Revenue | €							€ 50
Cash Acquired from Acquisition					2.8
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High | €										€ 35
Contingent consideration related to acquisition										€ 25	$ 27.7
Payments to Acquire Businesses, Net of Cash Acquired					49.0
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual			$ 31.8
Stubbs [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred					99.4
Business Combination, Adjustment, indefinite lived intangible assets				$ 13.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	27.1			27.1
Business Combination, Adjustment, definite lived intangible assets				11.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	24.4			24.4
Business Combination, Adjustment, tangible assets				0.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets, Total	5.7			5.7
Business Combination, Adjustment, liabilities assumed				7.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	19.4			19.4
Business Combination, Adjustment, goodwill	19.0			19.0
Business acquisition valuation of assets allocated to goodwill	61.6			$ 61.6
Finite-Lived Intangible Asset, Useful Life				13 years 11 months
Amortization of Intangible Assets				$ 0.9
Business Acquisition, Pro Forma Revenue					30.0
Cash Acquired from Acquisition					$ 0.8
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual	$ 6.9			$ 21.6