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Segmental Reporting - Segment Reporting (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Net sales	$ 220.7	$ 199.4
Gross profit	65.7	63.8
Operating income	18.0	22.2
Pension credit/(charge)	0.8	0.7
Restructuring charge	(0.2)	0
Impairment of Octane Additives segment goodwill	0	(0.3)
Operating Segments [Member] | Fuel Specialties [Member]
Segment Reporting Information [Line Items]
Net sales	164.2	140.0
Gross profit	52.0	47.0
Operating income	25.8	24.9
Operating Segments [Member] | Performance Chemicals [Member]
Segment Reporting Information [Line Items]
Net sales	56.1	47.8
Gross profit	13.6	10.5
Operating income	6.5	5.0
Operating Segments [Member] | Octane Additives [Member]
Segment Reporting Information [Line Items]
Net sales	0.4	11.6
Gross profit	0.1	6.3
Operating income	(1.2)	4.8
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Pension credit/(charge)	(0.8)	(0.7)
Restructuring charge	(0.2)	0
Impairment of Octane Additives segment goodwill	0	(0.3)
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Corporate costs	$ (12.1)	$ (11.5)

X

- Definition

Corporate costs.

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No definition available.

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The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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The net result for the period of deducting operating expenses from operating revenues.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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