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Profit on Disposal of Subsidiary - Summary of Disposal Unit (Detail) - Aroma Chemicals Business Unit [Member] $ in Millions	Jul. 06, 2015 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total consideration	$ 41.5
Net assets disposed	(33.9)
Other effects	(6.0)
Net gain	$ 1.6

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Amount classified as assets attributable to disposal group held for sale or disposed of.

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