Innospec (IOSP) 10-Q 6 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 31, 2013
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-13	'
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'
Entity Registrant Name	'INNOSPEC INC.	'
Entity Central Index Key	'0001054905	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	23,755,204

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended		9 Months Ended
In Millions, except Share data in Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]	'	'	'	'
Net sales	$192.80	$183.40	$577.20	$562.70
Cost of goods sold	-135.4	-132.7	-396.6	-391.3
Gross profit	57.4	50.7	180.6	171.4
Operating expenses:	'	'	'	'
Selling, general and administrative	-31.8	-28.3	-99	-83.4
Research and development	-5.7	-4.8	-16.6	-14.4
Restructuring charge	0	-0.1	0	-0.2
Impairment of Octane Additives segment goodwill	-0.4	-0.3	-1	-0.9
Profit on disposal	0	0.1	0	0.1
Total operating expenses	-37.9	-33.4	-116.6	-98.8
Operating income	19.5	17.3	64	72.6
Other net income/(expense)	-0.8	-0.1	-0.8	-3.3
Interest expense	-0.5	-0.4	-1.4	-1.3
Interest income	0.1	0.2	0.3	0.5
Income before income taxes	18.3	17	62.1	68.5
Income taxes	-4.3	-1.5	-13	-12.9
Net income	$14	$15.50	$49.10	$55.60
Earnings per share:	'	'	'	'
Basic	$0.59	$0.67	$2.09	$2.40
Diluted	$0.58	$0.65	$2.04	$2.33
Weighted average shares outstanding (in thousands):	'	'	'	'
Basic	23,621	23,240	23,518	23,148
Diluted	24,096	23,923	24,085	23,872

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement Of Income And Comprehensive Income [Abstract]	'	'	'	'
Net income	$14	$15.50	$49.10	$55.60
Other comprehensive income/(loss):	'	'	'	'
Changes in cumulative translation adjustment	2.2	1.7	-1.6	2.9
Changes in unrealized gains/(losses) on derivative instruments, net of tax of $0.0, $0.0, $0.0 and $0.1, respectively	0	0	-0.1	-0.1
Amortization of prior service credit, net of tax of $0.1, $0.0, $0.2 and $0.2, respectively	-0.2	-0.3	-0.7	-0.7
Amortization of actuarial net losses, net of tax of $(0.3), $0.0, $(1.0) and $(0.2), respectively	1.4	0.3	4	0.7
Total other comprehensive income/(loss)	3.4	1.7	1.6	2.8
Total comprehensive income	$17.40	$17.20	$50.70	$58.40

Consolidated_Statements_of_Com1

Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement Of Income And Comprehensive Income [Abstract]	'	'	'	'
Changes in unrealized gains/(losses) on derivative instruments, tax	$0	$0	$0	$0.10
Amortization of prior service credit, tax	0.1	0	0.2	0.2
Amortization of actuarial net losses, tax	($0.30)	$0	($1)	($0.20)

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$53.90	$22.40
Short-term investments	6.4	5.1
Trade and other accounts receivable (less allowances of $2.3 and $1.9, respectively)	113	115.7
Inventories (less allowances of $9.2 and $8.9, respectively):	'	'
Finished goods	106.1	75.2
Work in progress	2.2	1.5
Raw materials	59	61.6
Total inventories	167.3	138.3
Current portion of deferred tax assets	11	11
Prepaid expenses	6.6	4.1
Prepaid income taxes	5	0
Total current assets	363.2	296.6
Property, plant and equipment:	'	'
Gross cost	155.1	146.2
Less accumulated depreciation	-104.4	-96.4
Net property, plant and equipment	50.7	49.8
Goodwill	165.3	149
Other intangible assets	104.8	68.6
Deferred finance costs	1.7	1.3
Deferred tax assets, net of current portion	11.2	12.7
Other non-current assets	1	1.4
Total assets	697.9	579.4
Current liabilities:	'	'
Accounts payable	56.9	57.3
Accrued liabilities	82.6	72.1
Accrued income taxes	0	3.2
Current portion of long-term debt	5	5
Current portion of plant closure provisions	3.7	5.1
Current portion of unrecognized tax benefits	5.4	3
Current portion of deferred tax liabilities	0.1	0.2
Current portion of deferred income	0.1	1.4
Total current liabilities	153.8	147.3
Long-term debt, net of current portion	88	25
Plant closure provisions, net of current portion	27.4	25.3
Unrecognized tax benefits, net of current portion	7.1	9.8
Deferred tax liabilities, net of current portion	3.2	3.6
Pension liabilities	36.7	46
Acquisition-related contingent consideration	4.6	4.3
Other non-current liabilities	0.2	0.2
Deferred income, net of current portion	0.9	0.9
Stockholders' equity:	'	'
Common stock, $0.01 par value, authorized 40,000,000 shares, issued 29,554,500 shares	0.3	0.3
Additional paid-in capital	297	292.1
Treasury stock (5,799,296 and 6,222,076 shares at cost, respectively)	-81.6	-85
Retained earnings	330.1	281
Accumulated other comprehensive loss	-169.8	-171.4
Total stockholders' equity	376	317
Total liabilities and stockholders' equity	$697.90	$579.40

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, except Share data, unless otherwise specified
Statement Of Financial Position [Abstract]	'	'
Allowances for doubtful accounts	$2.30	$1.90
Inventory allowances	$9.20	$8.90
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	29,554,500	29,554,500
Treasury stock, shares	5,799,296	6,222,076

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012
Cash Flows from Operating Activities	'		'
Net income	$49.10		$55.60
Adjustments to reconcile net income to net cash provided by operating activities:	'		'
Depreciation and amortization	13.4	[1]	8.3	[1]
Impairment of Octane Additives segment goodwill	1		0.9
Deferred taxes	0.9		0.9
Profit on disposal of property, plant and equipment	0		-0.1
Repayment of promissory note in civil complaint settlement	-5		-5
Changes in working capital:	'		'
Trade and other accounts receivable	7.2		6.3
Inventories	-24.5		-7.6
Prepaid expenses	-2.2		-0.2
Accounts payable and accrued liabilities	3.9		7.5
Excess tax benefit from stock based payment arrangements	-2.9		-2.1
Accrued income taxes	-5.3		1
Movement on plant closure provisions	0.6		0
Cash contributions to defined benefit pension plans	-8.1		-7
Non-cash expense of defined benefit pension plans	2.6		0.1
Stock option compensation	1.9		2.4
Movements on unrecognized tax benefits	-0.3		-0.1
Movements on other non-current assets and liabilities	-0.5		-1.9
Net cash provided by operating activities	31.8		59
Cash Flows from Investing Activities	'		'
Capital expenditures	-6.6		-5.7
Business combinations, net of cash acquired	-50.6		0
Internally developed software and other costs	-9		-6.4
Proceeds on disposal of property, plant and equipment	0.1		0.2
Purchase of short-term investments	-5.3		-3.3
Sale of short-term investments	4.1		4.2
Net cash provided by/(used in) investing activities	-67.3		-11
Cash Flows from Financing Activities	'		'
Net receipt/(repayment) of revolving credit facility	68		4
Refinancing costs	-0.7		0
Excess tax benefit from stock based payment arrangements	2.9		2.1
Issue of treasury stock	0.7		0.8
Repurchase of common stock	-3.7		-1.4
Net cash provided by/(used in) financing activities	67.2		5.5
Effect of foreign currency exchange rate changes on cash	-0.2		-0.1
Net change in cash and cash equivalents	31.5		53.4
Cash and cash equivalents at beginning of period	22.4		76.2
Cash and cash equivalents at end of period	$53.90		$129.60
[1]	Amortization of deferred finance costs of $0.3 million (2012 - $0.3 million) are included in depreciation and amortization in the cash flow statement but in interest expense in the income statement.

Consolidated_Statements_of_Cas1

Consolidated Statements of Cash Flows (Parenthetical) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Statement Of Cash Flows [Abstract]	'	'
Amortization of deferred finance costs	$0.30	$0.30

Consolidated_Statement_of_Stoc

Consolidated Statement of Stockholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]
In Millions
Beginning Balance at Dec. 31, 2012	$317	$0.30	$292.10	($85)	$281	($171.40)
Net income	49.1	'	'	'	49.1	'
Changes in cumulative translation adjustment	-1.6	'	'	'	'	-1.6
Changes in unrealized gains/(losses) on derivative instruments, net of tax	-0.1	'	'	'	'	-0.1
Treasury stock re-issued	1	'	-4	5	'	'
Treasury stock repurchased	-3.7	'	'	-3.7	'	'
Excess tax benefit from stock based payment arrangements	2.9	'	2.9	'	'	'
Stock option compensation	1.9	'	1.9	'	'	'
Fair value of acquisition- related consideration	6.2	'	4.1	2.1	'	'
Amortization of prior service credit, net of tax	-0.7	'	'	'	'	-0.7
Amortization of actuarial net losses, net of tax	4	'	'	'	'	4
Ending Balance at Sep. 30, 2013	$376	$0.30	$297	($81.60)	$330.10	($169.80)

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Basis of Presentation	'
	NOTE 1 – BASIS OF PRESENTATION
	The accompanying unaudited interim consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X under the Securities Exchange Act of 1934. Accordingly, they do not include all the information and notes necessary for a comprehensive presentation of financial position, results of operations and cash flows.
	It is our opinion, however, that all adjustments (consisting of normal, recurring adjustments, unless otherwise disclosed) have been made which are necessary for the financial statements to be fairly stated. These financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K filed on February 13, 2013.
	The results for the interim period covered by this report are not necessarily indicative of the results to be expected for the full year.
	When we use the terms the “Corporation,” “Company,” “Registrant,” “we,” “us” and “our,” we are referring to Innospec Inc. and its consolidated subsidiaries (“Innospec”) unless otherwise indicated or the context otherwise requires.

Segmental_Reporting

Segmental Reporting	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]	'
Segmental Reporting	'
	NOTE 2 – SEGMENTAL REPORTING
	Innospec divides its business into three segments for management and reporting purposes: Fuel Specialties, Performance Chemicals and Octane Additives. The Fuel Specialties and Performance Chemicals segments operate in markets where we actively seek growth opportunities although their ultimate customers are different. The Octane Additives segment is generally characterized by volatile and declining demand.
	The Company evaluates the performance of its segments based on operating income. The following table analyzes sales and other financial information by the Company’s reportable segments:
		Three Months Ended						Nine Months Ended
		September 30						September 30
	(in millions)	2013			2012			2013			2012
	Net sales:
	Fuel Specialties	$	137.4		$	127		$	403.6		$	372.2
	Performance Chemicals		47.9			46.8			140.2			138.2
	Octane Additives		7.5			9.6			33.4			52.3
		$	192.8		$	183.4		$	577.2		$	562.7
	Gross profit:
	Fuel Specialties	$	42.6		$	36.8		$	130.1		$	110.2
	Performance Chemicals		11.1			10.4			32.9			33.6
	Octane Additives		3.7			3.5			17.6			27.6
		$	57.4		$	50.7		$	180.6		$	171.4
	Operating income:
	Fuel Specialties	$	22.3		$	19.6		$	66.4		$	58.2
	Performance Chemicals		5.6			5.6			17.1			18.8
	Octane Additives		2.1			1.5			13			21.9
	Pension credit/(charge)		(0.7	)		0			(2.1	)		0.2
	Corporate costs		(9.4	)		(9.1	)		(29.4	)		(25.5	)
	Restructuring charge		0			(0.1	)		0			(0.2	)
	Impairment of Octane Additives segment goodwill		(0.4	)		(0.3	)		(1.0	)		(0.9	)
	Profit on disposal		0			0.1			0			0.1
	Total operating income	$	19.5		$	17.3		$	64		$	72.6
	The pension credit/(charge) relates to the United Kingdom defined benefit pension plan which is closed to future service accrual. The charges related to our other much smaller pension arrangements in the U.S. and overseas are included in the segment and income statement captions consistent with the related employees’ costs.
	The following table presents a summary of the depreciation and amortization charges incurred by the Company’s reportable segments:
		Three Months Ended						Nine Months Ended
		September 30						September 30
	(in millions)	2013			2012			2013			2012
	Depreciation:
	Fuel Specialties	$	0.5		$	0.4		$	1.7		$	1.4
	Performance Chemicals		0.9			0.6			2.6			1.8
	Octane Additives		0.1			0.2			0.5			0.5
	Corporate		0.6			0.4			1.7			1.2
		$	2.1		$	1.6		$	6.5		$	4.9
	Amortization:
	Fuel Specialties	$	1.6		$	0.6		$	4.8		$	1.6
	Performance Chemicals		0.6			0.3			1.3			1
	Octane Additives		0.2			0.2			0.5			0.5
		$	2.4		$	1.1		$	6.6		$	3.1

Earnings_Per_Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	NOTE 3 – EARNINGS PER SHARE
	Basic earnings per share is based on the weighted average number of common shares outstanding during the period. Diluted earnings per share includes the effect of options that are dilutive and outstanding during the period. Per share amounts are computed as follows:
		Three Months Ended				Nine Months Ended
		September 30				September 30
		2013		2012		2013		2012
	Numerator (in millions):
	Net income available to common stockholders	$	14	$	15.5	$	49.1	$	55.6
	Denominator (in thousands):
	Weighted average common shares outstanding		23,621		23,240		23,518		23,148
	Dilutive effect of stock options and awards		475		683		567		724
	Denominator for diluted earnings per share		24,096		23,923		24,085		23,872
	Net income per share, basic:	$	0.59	$	0.67	$	2.09	$	2.4
	Net income per share, diluted:	$	0.58	$	0.65	$	2.04	$	2.33
	In the three and nine months ended September 30, 2013, the average number of anti-dilutive options excluded from the calculation of diluted earnings per share were nil and nil, respectively (2012 – 1,380 and 1,380, respectively).

Goodwill

Goodwill	9 Months Ended
	Sep. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'
Goodwill	'
	NOTE 4 – GOODWILL
	The following table summarizes the goodwill movement year on year:
	(in millions)		Nine Months Ended
			September 30
			2013			2012
	At January 1:
	Gross cost (1)		$	384.2		$	375.5
	Accumulated impairment losses			(235.2	)		(234.0	)
	Net book amount			149			141.5
	Exchange effect			(0.1	)		(0.1	)
	Acquisitions			17			0
	Adjustments to purchase price allocation			0.4			0
	Impairment losses			(1.0	)		(0.9	)
	At September 30:
	Gross cost (1)			401.5			375.4
	Accumulated impairment losses			(236.2	)		(234.9	)
	Net book amount		$	165.3		$	140.5
	(1)	Gross cost for 2013 and 2012 is net of $298.5 million of historical accumulated amortization.
	Acquisitions
	On August 30, 2013, the Company acquired 100% of the voting equity interests in Chemsil Silicones, Inc. (“Chemsil”) and Chemtec Chemical Co. (“Chemtec”), both of which are based at Chatsworth in Los Angeles, California. Chemsil develops and markets silicone-based formulations to the personal care industry and Chemtec distributes a wide range of personal care ingredients. We acquired these businesses in order to add to both the technology base and the geographical footprint of our Personal Care business within our Performance Chemicals segment. The companies have combined annual sales of approximately $40 million.
	The purchase price for Chemsil and Chemtec, net of cash acquired, comprised $51.2 million in cash and $6.2 million of Innospec Inc. common stock transferred to the previous owner on the acquisition date.
	Included in the consolidated income statement of the Company since the acquisition date, are the following revenue and earnings for Chemsil and Chemtec combined:
	(in millions)		Chemsil
			&
			Chemtec
	Net sales		$	3.1
	Net income		$	0.2
	For illustrative purposes only pro forma information of the enlarged group is provided below but is not necessarily indicative of what the financial position or results of operations would have been had the Chemsil and Chemtec acquisitions been completed as of January 1, 2012. In addition, the unaudited pro forma financial information is not indicative of, nor does it purport to project, the future financial position of operating results of the enlarged group.
	(in millions, except per share data)		2013			2012
	Net sales		$	604.7		$	604.6
	Net income		$	50.2		$	59
	Earnings per share – basic		$	2.13		$	2.55
	– diluted		$	2.08		$	2.47
	Included in the 2012 comparative above, in addition to Chemsil and Chemtec, is unaudited pro forma information for Strata Control Services, Inc. (“Strata”), which the Company acquired on December 24, 2012 as if the acquisition had been completed as of January 1, 2012. Adjustments to the unaudited pro forma financial information include amortization in respect of the acquired other intangible assets for the Chemsil, Chemtec and Strata acquisitions, and the acquisition-related costs incurred in respect of all these transactions.
	The following tables summarize the calculations of the total purchase price and the estimated allocation of the purchase price to the assets acquired and liabilities assumed for Chemsil and Chemtec. The purchase price allocation is not yet complete as we are in the process of finalising the valuation of the assets acquired. Final determination of the fair values may result in adjustments to the amounts presented below:
	(in millions)		Chemsil
			&
			Chemtec
	Other intangible assets		$	33.7
	Goodwill			17
	Other net assets			6.7
	Purchase price, net of cash acquired		$	57.4
	Chemsil and Chemtec, and the associated goodwill, are included within our Performance Chemicals segment for management and reporting purposes (see Note 5 for further information on the other intangible assets).
	Adjustments to Strata purchase price allocation
	During the three months ended June 30, 2013, we finalized our calculations of the fair values of assets acquired and liabilities assumed in the acquisition of Strata, resulting in a $0.4 million reduction in other net assets acquired and a corresponding increase in goodwill.

Other_Intangible_Assets

Other Intangible Assets	9 Months Ended
	Sep. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'
Other Intangible Assets	'
	NOTE 5 – OTHER INTANGIBLE ASSETS
	The following table summarizes the other intangible assets movement year on year:
		Nine Months Ended
		September 30
	(in millions)	2013			2012
	Gross cost at January 1	$	106.2		$	51.2
	Capitalization of internally developed software and other costs		9			6.4
	Acquisitions		33.7			0
	Exchange effect		0.1			0.2
	Gross cost at September 30		149			57.8
	Accumulated amortization at January 1		(37.6	)		(33.5	)
	Amortization expense		(6.6	)		(3.1	)
	Exchange effect		0			(0.2	)
	Accumulated amortization at September 30		(44.2	)		(36.8	)
	Net book amount at September 30	$	104.8		$	21
	Chemsil and Chemtec
	On August 30, 2013, the Company acquired 100% of the voting equity interests in Chemsil and Chemtec. Subject to finalization of the purchase price allocation and related valuation process we have provisionally allocated $33.7 million of the purchase price to other intangible assets which we are amortizing on a straight-line basis to the income statement over an estimated weighted average expected life of 9 years. These intangible assets principally relate to product rights and an amortization expense of $0.3 million was recognized in administrative expenses since the acquisition date (2012 – $0.0 million).
	Strata
	On December 24, 2012, the Company acquired 100% of the voting equity interests in Strata. We have allocated $48.0 million of the purchase price to other intangible assets which we are amortizing on a straight-line basis to the income statement over a weighted average expected life of 13.1 years. These intangible assets comprise the following:
	•	technology ($18.3 million) being amortized straight-line over 16.5 years. In the first nine months of 2013 amortization expense of $0.8 million was recognized in cost of goods sold (2012 – $0.0 million).
	•	customer relationships ($28.2 million) and a non-compete agreement ($1.5 million) being amortized straight-line over 11.5 years and 2.0 years, respectively. In the first nine months of 2013 amortization expenses of $1.8 million and $0.6 million were recognized in selling, general and administrative expenses, respectively (2012 – $0.0 million and $0.0 million, respectively).
	Internally developed software and other costs
	We are continuing with the implementation of a new, company-wide, information system platform. At September 30, 2013, we had capitalized $19.1 million (2012 – $9.5 million) in relation to this internally developed software. No amortization expense was recognized in the first nine months of 2013 (2012 – $0.0 million).
	Others
	The remaining intangible assets of $48.2 million relate to those recognized in the acquisition accounting in respect of technology, customer relationships and patents; and sales and marketing agreements to market and sell tetra ethyl lead (“TEL”). These assets are being amortized straight-line over periods of up to 13 years. In the first nine months of 2013 amortization expenses of $2.0 million and $1.1 million were recognized in cost of goods sold and selling, general and administrative expenses, respectively (2012 – $2.0 million and $1.1 million, respectively).

Pension_Plans

Pension Plans	9 Months Ended
	Sep. 30, 2013
Compensation And Retirement Disclosure [Abstract]	'
Pension Plans	'
	NOTE 6 – PENSION PLANS
	The Company maintains a defined benefit pension plan (the “Plan”) covering a number of its current and former employees in the United Kingdom, although it does also have other much smaller pension arrangements in the U.S. and overseas. The Plan is closed to future service accrual but has a large number of deferred and current pensioners.
		Three Months Ended						Nine Months Ended
		September 30						September 30
	(in millions)	2013			2012			2013			2012
	Plan net pension credit/(charge):
	Service cost	$	(0.4	)	$	(0.4	)	$	(1.2	)	$	(1.2	)
	Interest cost on projected benefit obligation		(7.6	)		(8.0	)		(23.2	)		(24.0	)
	Expected return on plan assets		8.7			8.4			26.4			25.4
	Amortization of prior service credit		0.3			0.3			0.9			0.9
	Amortization of actuarial net losses		(1.7	)		(0.3	)		(5.0	)		(0.9	)
		$	(0.7	)	$	0		$	(2.1	)	$	0.2
	The amortization of prior service credit and actuarial net losses is a reclassification out of accumulated other comprehensive income/(loss) into selling, general and administrative expenses.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	NOTE 7 – INCOME TAXES
	A roll-forward of unrecognized tax benefits and associated accrued interest and penalties is as follows:
	(in millions)	Interest and			Unrecognized			Total
		Penalties			Tax Benefits
	Opening balance at January 1, 2013	$	0.6		$	12.2		$	12.8
	Additions for tax positions of prior periods		0.2			0.1			0.3
	Reductions due to lapsed statutes of limitations		(0.1	)		(0.5	)		(0.6	)
	Closing balance at September 30, 2013		0.7			11.8			12.5
	Current		(0.4	)		(5.0	)		(5.4	)
	Non-current	$	0.3		$	6.8		$	7.1
	All of the $12.5 million of unrecognized tax benefits, and interest and penalties, would impact our effective tax rate if recognized.
	We recognize accrued interest and penalties associated with uncertain tax positions as part of income taxes in our consolidated statements of income.
	The Company or one of its subsidiaries files income tax returns with the U.S. federal government, and various state and foreign jurisdictions. As at September 30, 2013, the Company and its U.S. subsidiaries were subject to tax audits in the U.S. and the Company’s German and United Kingdom subsidiaries were subject to tax audits in Germany and the United Kingdom, respectively. The Company does not currently anticipate that adjustments, if any, arising out of these tax audits would result in a material change to its financial position as at September 30, 2013.
	The Company’s subsidiaries in foreign tax jurisdictions are open to examination including France (2009 onwards), Germany (2006 onwards), Switzerland (2011 onwards) and the United Kingdom (2010 onwards).
	The Company is in a position to control whether or not to repatriate foreign earnings and we intend to permanently reinvest earnings overseas to fund overseas subsidiaries. No taxes have been provided for on the unremitted earnings of our overseas subsidiaries as any tax basis differences relating to investments in these overseas subsidiaries are considered to be permanent in duration. The amount of unremitted earnings at December 31, 2012 and 2011 was approximately $717 million and $665 million, respectively. If these earnings are remitted, additional taxes could result after offsetting foreign income taxes paid although the calculation of the additional taxes is not practical at this time.

LongTerm_Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Long-Term Debt	'
	NOTE 8 – LONG-TERM DEBT
	Long-term debt consists of the following:
	(in millions)	September 30,			December 31,
		2013			2012
	Revolving credit facility	$	88		$	20
	Promissory note		5			10
			93			30
	Less current portion		(5.0	)		(5.0	)
		$	88		$	25
	On August 28, 2013, we amended our five-year revolving credit facility (“the facility”). The amendment provides for an increase in the facility available to the Company and certain subsidiaries of the Company from $100 million to $150 million and retains the term of the facility through to December 2016. In addition, the amendment allows the Company to request an additional amount of up to $50 million to be committed by the lenders. As a result $0.7 million of refinancing costs have been capitalized in the quarter and are being amortized over the expected life of the facility in line with the costs capitalized for the original facility in December 2011.

Plant_Closure_Provisions

Plant Closure Provisions	9 Months Ended
	Sep. 30, 2013
Restructuring And Related Activities [Abstract]	'
Plant Closure Provisions	'
	NOTE 9 – PLANT CLOSURE PROVISIONS
	The principal site giving rise to environmental remediation liabilities is the manufacturing site at Ellesmere Port in the United Kingdom. There are also environmental remediation liabilities on a much smaller scale in respect of our other manufacturing sites in the U.S. and Europe. The liability for estimated closure costs of Innospec’s manufacturing facilities includes costs for decontamination and environmental remediation activities (“remediation”).
	Movements in the provisions for the nine months ended September 30 are summarized as follows:
		2013									2012
	(in millions)	Severance			Remediation			Total			Total
	Total at January 1	$	1.1		$	29.3		$	30.4		$	28.6
	Charge for the period		0			2			2			2.1
	Utilized in the period		(0.1	)		(1.3	)		(1.4	)		(2.2	)
	Exchange effect		0			0.1			0.1			0
	Closing balance at September 30		1			30.1			31.1			28.5
	Due within one year		0			(3.7	)		(3.7	)		(3.6	)
	Due after one year	$	1		$	26.4		$	27.4		$	24.9
	Amounts due within one year refer to provisions where expenditure is expected to arise within one year of the balance sheet date. Severance charges are recognized in the income statement as restructuring costs along with other restructuring costs. Remediation costs are recognized in cost of goods sold.
	Remediation
	The remediation provision represents the Company’s liability for environmental liabilities and asset retirement obligations. The charge for the period above, of $2.0 million, represents the accretion expense recognized in the first nine months of 2013.
	We recognize environmental liabilities when they are probable and costs can be reasonably estimated, and asset retirement obligations when there is a legal obligation and costs can be reasonably estimated. The Company has to anticipate the program of work required and the associated future expected costs, and comply with environmental legislation in the countries in which it operates or has operated in. The Company views the costs of vacating our Ellesmere Port site as contingent upon if and when it vacates the site because there is no present intention to do so. The Company has further determined that, due to the uncertain product life of TEL particularly in the market for aviation gasoline and other products being manufactured on the site, there are uncertainties as to the probability and timing of the expected costs. Such uncertainties have been considered in estimating the provision.

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	NOTE 10 – FAIR VALUE MEASUREMENTS
	Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (exit price). The Company utilizes a mid-market pricing convention for valuing the majority of its assets and liabilities measured and reported at fair value. The Company utilizes market data or assumptions that market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. These inputs can be readily observable, market corroborated or generally unobservable. The Company primarily applies the market approach for recurring fair value measurements and endeavors to utilize the best available information. Accordingly, the Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. The Company is able to classify fair value balances based on the observability of those inputs. The Company gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement). Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy levels. In the first nine months of 2013, the Company evaluated the fair value hierarchy levels assigned to its assets and liabilities, and concluded that there should be no transfers into or out of Levels 1, 2 and 3.
	The following table presents the carrying amount and fair values of the Company’s assets and liabilities measured on a recurring basis:
		September 30, 2013				December 31, 2012
	(in millions)	Carrying		Fair		Carrying		Fair
		Amount		Value		Amount		Value
	Assets
	Non-derivatives:
	Cash and cash equivalents	$	53.9	$	53.9	$	22.4	$	22.4
	Short-term investments		6.4		6.4		5.1		5.1
	Non-financial assets (Level 3 measurement):
	Goodwill – Octane Additives		0.3		0.3		1.3		1.3
	Derivatives (Level 1 measurement):
	Other non-current assets:
	Commodity swaps		0		0		0.1		0.1
	Foreign currency forward exchange contracts		0.3		0.3		0.8		0.8
	Liabilities
	Non-derivatives:
	Long-term debt (including current portion)	$	93	$	93	$	30	$	30
	Non-financial liabilities (Level 3 measurement):
	Stock equivalent units		11.5		11.5		12.6		12.6
	Acquisition-related contingent consideration		4.6		4.6		4.3		4.3
	Commodity swaps are used to manage the Company’s cash flow exposure to raw material cost volatility. They were designated as cash flow hedges and qualified for hedge accounting as at December 31, 2011. At March 31, 2012, the commodity hedges were determined to be ineffective and consequently a gain of $0.1 million was recognized in earnings. The commodity hedges remained ineffective for the remainder of their term to June 2013, and accordingly all changes in their fair value subsequent to March 31, 2012 were recognized in earnings.
	Foreign currency forward exchange contracts primarily relate to contracts entered into to hedge future known transactions or hedge balance sheet net cash positions. The movements in the carrying amounts and fair values of these contracts are largely due to changes in exchange rates against the U.S. dollar.

Derivative_Instruments_and_Ris

Derivative Instruments and Risk Management	9 Months Ended
	Sep. 30, 2013
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'
Derivative Instruments and Risk Management	'
	NOTE 11 – DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT
	The Company has limited involvement with derivative instruments and does not trade them. The Company does use derivatives to manage certain interest rate, foreign currency exchange rate and raw material cost exposures.
	The Company has hedged the cost of certain raw materials with commodity swaps which are summarized as follows:
		September 30, 2013						December 31, 2012
	(in millions)	Carrying				Fair		Carrying		Fair
		Amount				Value		Amount		Value
	Notional quantity – 275 tonnes							$	0.1	$	0.1
	Notional quantity – 0 tonnes	$	0			$	0
	We enter into various foreign currency forward exchange contracts to minimize currency exchange rate exposure from expected future cash flows. The contracts have maturity dates of up to four years at the date of inception. These foreign currency forward exchange contracts have not been designated as hedging instruments, and their impact on the income statement for the first nine months of 2013 is summarized below:
	(in millions)	Location of Gain/(Loss)		Amount of Gain/(Loss)
		Recognized in Income		Recognized in Income
	Foreign currency forward exchange contracts	Other income/(expense)		$	(0.7	)
	The Company sells a range of Fuel Specialties, Performance Chemicals and Octane Additives products to major oil refineries and chemical companies throughout the world. Credit limits, ongoing credit evaluation and account monitoring procedures are intended to minimize bad debt risk. Collateral is not generally required.

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	NOTE 12 – COMMITMENTS AND CONTINGENCIES
	Resolution of certain government investigations and other matters
	As we have previously disclosed, in the first quarter of 2010, the Company reached a $40.2 million settlement to resolve all matters in respect of investigations by U.S. and United Kingdom government authorities into certain legacy transactions conducted by the Company and its subsidiaries under the United Nations Oil for Food Program, the U.S. Foreign Corrupt Practices Act, the U.S. Cuban Assets Control Regulations and United Kingdom anti-bribery laws. The settlement consists of fines, penalties and disgorgements which are payable over a period of four years commencing 2010. As at September 30, 2013, the expected schedule of payments was as follows:
	(in millions)	Government			Compliance			Total
		Authorities			Monitor
	Fines, penalties and disgorgements	$	40.2		$	0		$	40.2
	Fees and associated expenses		0			3.9			3.9
	Less discounting to fair value		0			0			0
			40.2			3.9			44.1
	Amounts paid		(36.5	)		(3.3	)		(39.8	)
	Exchange effect		0.1			0			0.1
			3.8			0.6			4.4
	Due within one year		(3.8	)		(0.6	)		(4.4	)
		$	0		$	0		$	0
	For accounting purposes only we are required under GAAP, in accordance with our accounting policy, to discount elements of the fines, penalties and disgorgements to their fair value.
	Jalal Bezee Mejel Al-Gaood & Partner litigation
	On September 19, 2012, a claim was filed in the High Court of Justice in the United Kingdom by Jalal Bezee Mejel Al-Gaood & Partner and Future Agencies Company Limited (collectively “JAG”) against the Company, Innospec Limited and a former employee of Innospec Limited. The Company believes JAG was the former Iraq distributor for Afton Chemicals Limited, a subsidiary of NewMarket Corporation, from at least 2005 until termination of that relationship in 2010. The stated claim, inclusive of costs and expenses, is for up to $42.3 million and relates to alleged loss of profits for JAG’s business in Iraq between 2004 and 2010. The Company believes that the allegations in the JAG claim are without merit and intends to defend vigorously its interests.
	Other legal matters
	While we are involved from time to time in claims and legal proceedings that result from, and are incidental to, the conduct of our business including business and commercial litigation, employee and product liability claims, there are no other material pending legal proceedings to which the Company or any of its subsidiaries is a party, or of which any of their property is subject. It is possible, however, that an adverse resolution of an unexpectedly large number of such individual claims or proceedings could in the aggregate have a material adverse effect on results of operations for a particular year or quarter.
	Guarantees
	The Company and certain of the Company’s consolidated subsidiaries are contingently liable for certain obligations of affiliated companies primarily in the form of guarantees of debt and performance under contracts entered into as a normal business practice. This includes guarantees of non-U.S. excise taxes and customs duties. As at September 30, 2013, such contingent liabilities which are not recognized as liabilities in the consolidated financial statements amounted to $5.0 million.
	Under the terms of the guarantee arrangements, generally the Company would be required to perform should the affiliated company fail to fulfil its obligations under the arrangements. In some cases, the guarantee arrangements have recourse provisions that would enable the Company to recover any payments made under the terms of the guarantees from securities held of the guaranteed parties’ assets.
	The Company and its affiliates have numerous long-term sales and purchase commitments in their various business activities, which are expected to be fulfilled with no adverse consequences material to the Company.

Stockholders_Equity_and_StockB

Stockholders' Equity and Stock-Based Compensation Plans	9 Months Ended
	Sep. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Stockholders' Equity and Stock-Based Compensation Plans	'
	NOTE 13 – STOCKHOLDERS’ EQUITY AND STOCK-BASED COMPENSATION PLANS
	At September 30, 2013, the Company had authorized common stock of 40,000,000 shares (December 31, 2012 – 40,000,000). Issued shares at September 30, 2013, were 29,554,500 (December 31, 2012 – 29,554,500) and treasury stock amounted to 5,799,296 shares (December 31, 2012 – 6,222,076).
	The Company grants stock options and stock equivalent units (“SEUs”) from time to time as a long-term performance incentive. In certain cases the grants are subject to performance conditions such as the Company’s stock price. Where performance conditions apply the Monte Carlo simulation model is used to determine the fair values. Otherwise the Black-Scholes model is used to determine the fair values.
	Stock option plans
	The Company has five active stock option plans, two of which provide for the grant of stock options to employees, one provides for the grant of stock options to non-employee directors, and another provides for the grant of stock options to key executives on a matching basis provided they use a proportion of their annual bonus to purchase common stock in the Company on the open market or from the Company. The fifth plan is a savings plan which provides for the grant of stock options to all Company employees provided they commit to make regular savings over a pre-defined period which can then be used to purchase common stock upon vesting of the options. The stock options have discrete vesting periods which range from 24 months to 6 years and in all cases stock options granted expire within 10 years of the date of grant. All grants are at the sole discretion of the Compensation Committee of the Board of Directors. Grants may be priced at market value or at a premium or discount (including at no cost). The aggregate number of shares of common stock reserved for issuance which can be granted under the plans is 2,640,000.
	The following table summarizes the transactions of the Company’s stock option plans for the nine months ended September 30, 2013:
		Number of			Weighted		Weighted
		Options			Average		Average
					Exercise		Grant-Date
					Price		Fair Value
	Outstanding at December 31, 2012		1,001,241		$	6.27
	Granted – at discount		61,028		$	0	$	34
	– at market value		22,161		$	41.27	$	16.09
	Exercised		(353,048	)	$	2.07
	Forfeited		(25,418	)	$	6.25
	Outstanding at September 30, 2013		705,964		$	8.92
	At September 30, 2013, there were 168,706 stock options that were exercisable, of which 88,266 had performance conditions attached.
	The Company’s policy is to issue shares from treasury stock to holders of stock options who exercise those options, but if sufficient treasury stock is not available, the Company will issue previously unissued shares of stock to holders of stock options who exercise options.
	The total compensation cost for the first nine months of 2013 was $1.9 million (2012 – $2.4 million). The total intrinsic value of options exercised in the first nine months of 2013 was $3.2 million (2012 – $1.3 million).
	The total compensation cost related to non-vested stock options not yet recognized at September 30, 2013 was $2.5 million and this cost is expected to be recognized over the weighted-average period of 2.06 years.
	Stock equivalent units
	SEUs have discrete vesting periods which range from 11 months to 4 years and in all cases SEUs granted expire within 10 years of the date of grant. Grants may be priced at market value or at a premium or discount (including at no cost). There is no limit to the number of SEUs that can be granted. The liability for SEUs is located in accrued liabilities in the consolidated balance sheets until they are cash settled.
	The following table summarizes the transactions of the Company’s SEUs for the nine months ended September 30, 2013:
		Number			Weighted		Weighted
		of SEUs			Average		Average
					Exercise		Grant-Date
					Price		Fair Value
	Outstanding at December 31, 2012		623,828		$	2.95
	Granted – at discount		45,028		$	0	$	32.06
	– at market value		6,970		$	41.31	$	16.09
	Exercised		(276,118	)	$	2.29
	Forfeited		(2,361	)	$	10.38
	Outstanding at September 30, 2013		397,347		$	3.69
	At September 30, 2013, there were 72,104 SEUs that are exercisable, of which 65,762 had performance conditions attached.
	The charges for SEUs are spread over the life of the award subject to a revaluation to fair value each quarter. The revaluation may result in a charge or a credit to the income statement in the quarter dependent upon our share price and other performance criteria.
	The total compensation cost for the first nine months of 2013 was $6.3 million (2012 – $5.2 million). The total intrinsic value of SEUs exercised in the first nine months of 2013 was $2.1 million (2012 – $1.2 million).
	The weighted-average remaining vesting period of non-vested SEUs is 0.98 years.

Reclassifications_Out_of_Accum

Reclassifications Out of Accumulated Other Comprehensive Income/(Loss)	9 Months Ended
	Sep. 30, 2013
Text Block [Abstract]	'
Reclassifications Out of Accumulated Other Comprehensive Income/(Loss)	'
	NOTE 14 – RECLASSIFICATIONS OUT OF ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS)
	Reclassifications out of accumulated other comprehensive loss for the first nine months of 2013 were:
	(in millions)		Amount			Affected Line Item in the
	Details about AOCL Components		Reclassified			Statement where
			from AOCL			Net Income is Presented
	Derivative instruments:
	Realized gain/(loss) on derivative instruments		$	(0.1	)	Cost of goods sold
				(0.1	)	Total before tax
				0		Income tax expense
				(0.1	)	Net of tax
	Defined benefit pension plan items:
	Amortization of prior service credit			(0.9	)	See (1) below
	Amortization of actuarial net losses			5		See (1) below
				4.1		Total before tax
				(0.8	)	Income tax expense
				3.3		Net of tax
	Total reclassifications		$	3.2		Net of tax
	(1)	These items are included in the computation of net periodic pension cost. See Note 6 for additional information.
	Changes in accumulated other comprehensive loss for the first nine months of 2013, net of tax, were:
	(in millions)		Unrealized			Defined			Cumulative			Total
			Gains/			Benefit			Translation
			(Losses) on			Pension			Adjustments
			Derivative			Plan Items
			Instruments
	Balance at December 31, 2012		$	0.1		$	(136.6	)	$	(34.9	)	$	(171.4	)
	Other comprehensive income/(loss) before reclassifications			0			0			(1.6	)		(1.6	)
	Amounts reclassified from AOCL			(0.1	)		3.3			0			3.2
	Net current period other comprehensive income/(loss)			(0.1	)		3.3			(1.6	)		1.6
	Balance at September 30, 2013		$	0		$	(133.3	)	$	(36.5	)	$	(169.8	)

Recently_Issued_Accounting_Pro

Recently Issued Accounting Pronouncements	9 Months Ended
	Sep. 30, 2013
Accounting Changes And Error Corrections [Abstract]	'
Recently Issued Accounting Pronouncements	'
	NOTE 15 – RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS
	In July 2013, the FASB issued ASU 2013-11, Presentation of an Unrecognized Tax Benefit when a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (“ASU 2013-11”), which requires an unrecognized tax benefit to be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, similar tax loss, or a tax credit carryforward. To the extent the tax benefit is not available at the reporting date under the governing tax law or if the entity does not intend to use the deferred tax asset for such purpose, the unrecognized tax benefit should be presented as a liability and not combined with deferred tax assets. ASU 2013-11 is effective for annual periods, and interim periods within those years, beginning after December 15, 2013. The amendments are to be applied to all unrecognized tax benefits that exist as of the effective date and may be applied retrospectively to each prior reporting period presented. We do not expect a material impact from the adoption of this guidance on our consolidated financial statements.
	In February 2013, the FASB issued ASU 2013-02, Other Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. The amendments in ASU 2013-02 require the Company to report the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income, either on the face of the income statement or in the notes, if the amount being reclassified is required under GAAP to be reclassified in its entirety to net income in the same reporting period. For other amounts not required by GAAP to be reclassified in their entirety to net income in the same reporting period, an entity is required to cross-reference other disclosures which provide additional information about the amounts. The guidance is effective prospectively for reporting periods beginning after December 15, 2012. As this guidance provides only presentation requirements, the adoption of this standard did not impact the Company’s results of operations, financial position or cash flows.
	In July 2012, the FASB issued ASU 2012-02, Intangibles – Goodwill and Other (Topic 350): Testing Indefinite-Lived Intangible Assets for Impairment. ASU 2012-02 simplifies how entities test indefinite-lived intangible assets, other than goodwill, for impairment and permits an entity to first assess qualitative factors to determine whether it is more likely than not that the indefinite-lived intangible asset is impaired. The amendments are effective for annual and interim indefinite-lived intangible asset impairment tests performed for fiscal years beginning after September 15, 2012. The implementation of the amended accounting guidance has not had a material impact on our consolidated financial statements.
	In December 2011, the FASB issued ASU 2011-11, Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities. The objective of ASU 2011-11 is to facilitate convergence of GAAP and International Financial Reporting Standards and improve the comparability of statements of financial position. Entities are required to disclose both gross information and net information about both instruments and transactions eligible for offset in the statement of financial position and instruments and transactions subject to an agreement similar to a master netting arrangement. In January 2013, the FASB issued ASU 2013-01, Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities, to limit the scope of ASU 2011-11 to derivatives, sale and repurchase agreements, and securities borrowing and securities lending arrangements. This guidance is effective for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods. Entities should provide the disclosures required by these amendments retrospectively for all comparative periods presented. The implementation of the amended accounting guidance has not had a material impact on our consolidated financial statements.

Related_Party_Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2013
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	NOTE 16 – RELATED PARTY TRANSACTIONS
	Mr. Robert I. Paller has been a non-executive director of the Company since November 1, 2009. The Company has retained and continues to retain Smith, Gambrell & Russell, LLP (“SGR”), a law firm with which Mr. Paller holds a position. In the first nine months of 2013 the Company incurred fees payable to SGR of $0.9 million (2012 full year – $0.8 million). As at September 30, 2013, the amount due to SGR from the Company was $0.8 million (December 31, 2012 – $0.0 million).

Subsequent_Events

Subsequent Events	9 Months Ended
	Sep. 30, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	NOTE 17 – SUBSEQUENT EVENTS
	On November 4, 2013, the Company acquired 100% of the voting equity interests in Bachman Services Inc., Specialty Intermediates Inc., Bachman Production Specialties Inc. and Bachman Drilling & Production Specialties Inc. (the “Bachman Group Companies”). The Bachman Group Companies provide chemicals and services to the oil and gas industry and are based in Oklahoma City, Oklahoma. We purchased the Bachman Group Companies for a cash consideration of $45 million and by the issuance of 319,953 shares of unregistered Innospec Inc. common stock to the previous owners with a fair value of approximately $15 million, based on the Innospec share price on the closing date. We acquired the businesses in order to move us towards critical mass, and bring both good technology and market positioning in the oilfield specialties sector which forms part of our Fuel Specialties segment. The Bachman Group Companies has annual sales of approximately $80 million. At the time of filing our September 30, 2013 Form 10-Q we are unable to provide supplemental pro forma information or include disclosures regarding the acquisition–date fair values of the acquired assets and liabilities as we have not completed our valuation analysis. We intend to perform a valuation of the assets acquired and liabilities assumed for our 2013 Form 10-K, and so determine the intangibles assets and related amortization to be included in the pro forma information.

Recently_Issued_Accounting_Pro1

Recently Issued Accounting Pronouncements (Policies)	9 Months Ended
	Sep. 30, 2013
Accounting Changes And Error Corrections [Abstract]	'
Presentation of an Unrecognized Tax Benefit	'
	In July 2013, the FASB issued ASU 2013-11, Presentation of an Unrecognized Tax Benefit when a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (“ASU 2013-11”), which requires an unrecognized tax benefit to be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, similar tax loss, or a tax credit carryforward. To the extent the tax benefit is not available at the reporting date under the governing tax law or if the entity does not intend to use the deferred tax asset for such purpose, the unrecognized tax benefit should be presented as a liability and not combined with deferred tax assets. ASU 2013-11 is effective for annual periods, and interim periods within those years, beginning after December 15, 2013. The amendments are to be applied to all unrecognized tax benefits that exist as of the effective date and may be applied retrospectively to each prior reporting period presented. We do not expect a material impact from the adoption of this guidance on our consolidated financial statements.
Other Comprehensive Income	'
	In February 2013, the FASB issued ASU 2013-02, Other Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. The amendments in ASU 2013-02 require the Company to report the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income, either on the face of the income statement or in the notes, if the amount being reclassified is required under GAAP to be reclassified in its entirety to net income in the same reporting period. For other amounts not required by GAAP to be reclassified in their entirety to net income in the same reporting period, an entity is required to cross-reference other disclosures which provide additional information about the amounts. The guidance is effective prospectively for reporting periods beginning after December 15, 2012. As this guidance provides only presentation requirements, the adoption of this standard did not impact the Company’s results of operations, financial position or cash flows.
Intangibles - Goodwill and Other	'
	In July 2012, the FASB issued ASU 2012-02, Intangibles – Goodwill and Other (Topic 350): Testing Indefinite-Lived Intangible Assets for Impairment. ASU 2012-02 simplifies how entities test indefinite-lived intangible assets, other than goodwill, for impairment and permits an entity to first assess qualitative factors to determine whether it is more likely than not that the indefinite-lived intangible asset is impaired. The amendments are effective for annual and interim indefinite-lived intangible asset impairment tests performed for fiscal years beginning after September 15, 2012. The implementation of the amended accounting guidance has not had a material impact on our consolidated financial statements.
Balance Sheet	'
	In December 2011, the FASB issued ASU 2011-11, Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities. The objective of ASU 2011-11 is to facilitate convergence of GAAP and International Financial Reporting Standards and improve the comparability of statements of financial position. Entities are required to disclose both gross information and net information about both instruments and transactions eligible for offset in the statement of financial position and instruments and transactions subject to an agreement similar to a master netting arrangement. In January 2013, the FASB issued ASU 2013-01, Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities, to limit the scope of ASU 2011-11 to derivatives, sale and repurchase agreements, and securities borrowing and securities lending arrangements. This guidance is effective for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods. Entities should provide the disclosures required by these amendments retrospectively for all comparative periods presented. The implementation of the amended accounting guidance has not had a material impact on our consolidated financial statements.

Segmental_Reporting_Tables

Segmental Reporting (Tables)	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]	'
Segmental Reporting	'
	The following table analyzes sales and other financial information by the Company’s reportable segments:
		Three Months Ended						Nine Months Ended
		September 30						September 30
	(in millions)	2013			2012			2013			2012
	Net sales:
	Fuel Specialties	$	137.4		$	127		$	403.6		$	372.2
	Performance Chemicals		47.9			46.8			140.2			138.2
	Octane Additives		7.5			9.6			33.4			52.3
		$	192.8		$	183.4		$	577.2		$	562.7
	Gross profit:
	Fuel Specialties	$	42.6		$	36.8		$	130.1		$	110.2
	Performance Chemicals		11.1			10.4			32.9			33.6
	Octane Additives		3.7			3.5			17.6			27.6
		$	57.4		$	50.7		$	180.6		$	171.4
	Operating income:
	Fuel Specialties	$	22.3		$	19.6		$	66.4		$	58.2
	Performance Chemicals		5.6			5.6			17.1			18.8
	Octane Additives		2.1			1.5			13			21.9
	Pension credit/(charge)		(0.7	)		0			(2.1	)		0.2
	Corporate costs		(9.4	)		(9.1	)		(29.4	)		(25.5	)
	Restructuring charge		0			(0.1	)		0			(0.2	)
	Impairment of Octane Additives segment goodwill		(0.4	)		(0.3	)		(1.0	)		(0.9	)
	Profit on disposal		0			0.1			0			0.1
	Total operating income	$	19.5		$	17.3		$	64		$	72.6
Summary of Segment Depreciation and Amortization	'
	The following table presents a summary of the depreciation and amortization charges incurred by the Company’s reportable segments:
		Three Months Ended						Nine Months Ended
		September 30						September 30
	(in millions)	2013			2012			2013			2012
	Depreciation:
	Fuel Specialties	$	0.5		$	0.4		$	1.7		$	1.4
	Performance Chemicals		0.9			0.6			2.6			1.8
	Octane Additives		0.1			0.2			0.5			0.5
	Corporate		0.6			0.4			1.7			1.2
		$	2.1		$	1.6		$	6.5		$	4.9
	Amortization:
	Fuel Specialties	$	1.6		$	0.6		$	4.8		$	1.6
	Performance Chemicals		0.6			0.3			1.3			1
	Octane Additives		0.2			0.2			0.5			0.5
		$	2.4		$	1.1		$	6.6		$	3.1

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Summary of Earnings Per Share	'
	Per share amounts are computed as follows:
		Three Months Ended				Nine Months Ended
		September 30				September 30
		2013		2012		2013		2012
	Numerator (in millions):
	Net income available to common stockholders	$	14	$	15.5	$	49.1	$	55.6
	Denominator (in thousands):
	Weighted average common shares outstanding		23,621		23,240		23,518		23,148
	Dilutive effect of stock options and awards		475		683		567		724
	Denominator for diluted earnings per share		24,096		23,923		24,085		23,872
	Net income per share, basic:	$	0.59	$	0.67	$	2.09	$	2.4
	Net income per share, diluted:	$	0.58	$	0.65	$	2.04	$	2.33

Goodwill_Tables

Goodwill (Tables)	9 Months Ended
	Sep. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'
Summarizes Goodwill Movement	'
	The following table summarizes the goodwill movement year on year:
	(in millions)		Nine Months Ended
			September 30
			2013			2012
	At January 1:
	Gross cost (1)		$	384.2		$	375.5
	Accumulated impairment losses			(235.2	)		(234.0	)
	Net book amount			149			141.5
	Exchange effect			(0.1	)		(0.1	)
	Acquisitions			17			0
	Adjustments to purchase price allocation			0.4			0
	Impairment losses			(1.0	)		(0.9	)
	At September 30:
	Gross cost (1)			401.5			375.4
	Accumulated impairment losses			(236.2	)		(234.9	)
	Net book amount		$	165.3		$	140.5
	(1)	Gross cost for 2013 and 2012 is net of $298.5 million of historical accumulated amortization.
Schedule of Consolidated Income Statement Included Revenue and Earnings	'
	Included in the consolidated income statement of the Company since the acquisition date, are the following revenue and earnings for Chemsil and Chemtec combined:
	(in millions)		Chemsil
			&
			Chemtec
	Net sales		$	3.1
	Net income		$	0.2
Schedule of Pro forma Financial Information	'
	For illustrative purposes only pro forma information of the enlarged group is provided below but is not necessarily indicative of what the financial position or results of operations would have been had the Chemsil and Chemtec acquisitions been completed as of January 1, 2012. In addition, the unaudited pro forma financial information is not indicative of, nor does it purport to project, the future financial position of operating results of the enlarged group.
	(in millions, except per share data)		2013			2012
	Net sales		$	604.7		$	604.6
	Net income		$	50.2		$	59
	Earnings per share – basic		$	2.13		$	2.55
	– diluted		$	2.08		$	2.47
Purchase Price and Fair Values of Assets Acquired and Liabilities Assumed	'
	The purchase price allocation is not yet complete as we are in the process of finalising the valuation of the assets acquired. Final determination of the fair values may result in adjustments to the amounts presented below:
	(in millions)		Chemsil
			&
			Chemtec
	Other intangible assets		$	33.7
	Goodwill			17
	Other net assets			6.7
	Purchase price, net of cash acquired		$	57.4

Other_Intangible_Assets_Tables

Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'
Summary of Other Intangible Assets	'
	The following table summarizes the other intangible assets movement year on year:
		Nine Months Ended
		September 30
	(in millions)	2013			2012
	Gross cost at January 1	$	106.2		$	51.2
	Capitalization of internally developed software and other costs		9			6.4
	Acquisitions		33.7			0
	Exchange effect		0.1			0.2
	Gross cost at September 30		149			57.8
	Accumulated amortization at January 1		(37.6	)		(33.5	)
	Amortization expense		(6.6	)		(3.1	)
	Exchange effect		0			(0.2	)
	Accumulated amortization at September 30		(44.2	)		(36.8	)
	Net book amount at September 30	$	104.8		$	21

Pension_Plans_Tables

Pension Plans (Tables)	9 Months Ended
	Sep. 30, 2013
Compensation And Retirement Disclosure [Abstract]	'
Defined Benefit Pension Plan	'
	The Plan is closed to future service accrual but has a large number of deferred and current pensioners.
		Three Months Ended						Nine Months Ended
		September 30						September 30
	(in millions)	2013			2012			2013			2012
	Plan net pension credit/(charge):
	Service cost	$	(0.4	)	$	(0.4	)	$	(1.2	)	$	(1.2	)
	Interest cost on projected benefit obligation		(7.6	)		(8.0	)		(23.2	)		(24.0	)
	Expected return on plan assets		8.7			8.4			26.4			25.4
	Amortization of prior service credit		0.3			0.3			0.9			0.9
	Amortization of actuarial net losses		(1.7	)		(0.3	)		(5.0	)		(0.9	)
		$	(0.7	)	$	0		$	(2.1	)	$	0.2

Income_Taxes_Tables

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'
Roll-Forward of Unrecognized Tax Benefits and Associated Accrued Interest and Penalties	'
	A roll-forward of unrecognized tax benefits and associated accrued interest and penalties is as follows:
	(in millions)	Interest and			Unrecognized			Total
		Penalties			Tax Benefits
	Opening balance at January 1, 2013	$	0.6		$	12.2		$	12.8
	Additions for tax positions of prior periods		0.2			0.1			0.3
	Reductions due to lapsed statutes of limitations		(0.1	)		(0.5	)		(0.6	)
	Closing balance at September 30, 2013		0.7			11.8			12.5
	Current		(0.4	)		(5.0	)		(5.4	)
	Non-current	$	0.3		$	6.8		$	7.1

LongTerm_Debt_Tables

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Schedule of Long-Term Debt	'
	Long-term debt consists of the following:
	(in millions)	September 30,			December 31,
		2013			2012
	Revolving credit facility	$	88		$	20
	Promissory note		5			10
			93			30
	Less current portion		(5.0	)		(5.0	)
		$	88		$	25

Plant_Closure_Provisions_Table

Plant Closure Provisions (Tables)	9 Months Ended
	Sep. 30, 2013
Restructuring And Related Activities [Abstract]	'
Movements in Plant Closure and Restructuring Provisions	'
	Movements in the provisions for the nine months ended September 30 are summarized as follows:
		2013									2012
	(in millions)	Severance			Remediation			Total			Total
	Total at January 1	$	1.1		$	29.3		$	30.4		$	28.6
	Charge for the period		0			2			2			2.1
	Utilized in the period		(0.1	)		(1.3	)		(1.4	)		(2.2	)
	Exchange effect		0			0.1			0.1			0
	Closing balance at September 30		1			30.1			31.1			28.5
	Due within one year		0			(3.7	)		(3.7	)		(3.6	)
	Due after one year	$	1		$	26.4		$	27.4		$	24.9

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Carrying Amount and Fair Values of the Company's Assets and Liabilities Measured on a Recurring Basis	'
	The following table presents the carrying amount and fair values of the Company’s assets and liabilities measured on a recurring basis:
		September 30, 2013				December 31, 2012
	(in millions)	Carrying		Fair		Carrying		Fair
		Amount		Value		Amount		Value
	Assets
	Non-derivatives:
	Cash and cash equivalents	$	53.9	$	53.9	$	22.4	$	22.4
	Short-term investments		6.4		6.4		5.1		5.1
	Non-financial assets (Level 3 measurement):
	Goodwill – Octane Additives		0.3		0.3		1.3		1.3
	Derivatives (Level 1 measurement):
	Other non-current assets:
	Commodity swaps		0		0		0.1		0.1
	Foreign currency forward exchange contracts		0.3		0.3		0.8		0.8
	Liabilities
	Non-derivatives:
	Long-term debt (including current portion)	$	93	$	93	$	30	$	30
	Non-financial liabilities (Level 3 measurement):
	Stock equivalent units		11.5		11.5		12.6		12.6
	Acquisition-related contingent consideration		4.6		4.6		4.3		4.3

Derivative_Instruments_and_Ris1

Derivative Instruments and Risk Management (Tables)	9 Months Ended
	Sep. 30, 2013
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'
Summary of Commodity Swaps	'
	The Company has hedged the cost of certain raw materials with commodity swaps which are summarized as follows:
		September 30, 2013						December 31, 2012
	(in millions)	Carrying				Fair		Carrying		Fair
		Amount				Value		Amount		Value
	Notional quantity – 275 tonnes							$	0.1	$	0.1
	Notional quantity – 0 tonnes	$	0			$	0
Summary of Foreign Currency Forward Exchange Contracts Which Have Not Been Designated as Hedging Instruments, and Their Impact on the Income Statement	'
	These foreign currency forward exchange contracts have not been designated as hedging instruments, and their impact on the income statement for the first nine months of 2013 is summarized below:
	(in millions)	Location of Gain/(Loss)		Amount of Gain/(Loss)
		Recognized in Income		Recognized in Income
	Foreign currency forward exchange contracts	Other income/(expense)		$	(0.7	)

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Schedule of Expected Settlement Payment	'
	The settlement consists of fines, penalties and disgorgements which are payable over a period of four years commencing 2010. As at September 30, 2013, the expected schedule of payments was as follows:
	(in millions)	Government			Compliance			Total
		Authorities			Monitor
	Fines, penalties and disgorgements	$	40.2		$	0		$	40.2
	Fees and associated expenses		0			3.9			3.9
	Less discounting to fair value		0			0			0
			40.2			3.9			44.1
	Amounts paid		(36.5	)		(3.3	)		(39.8	)
	Exchange effect		0.1			0			0.1
			3.8			0.6			4.4
	Due within one year		(3.8	)		(0.6	)		(4.4	)
		$	0		$	0		$	0

Stockholders_Equity_and_StockB1

Stockholders' Equity and Stock-Based Compensation Plans (Tables)	9 Months Ended
	Sep. 30, 2013
Stock Options Plan [Member]	'
Summary of Transactions of the Company's Stock Option Plans	'
	The following table summarizes the transactions of the Company’s stock option plans for the nine months ended September 30, 2013:
		Number of			Weighted		Weighted
		Options			Average		Average
					Exercise		Grant-Date
					Price		Fair Value
	Outstanding at December 31, 2012		1,001,241		$	6.27
	Granted – at discount		61,028		$	0	$	34
	– at market value		22,161		$	41.27	$	16.09
	Exercised		(353,048	)	$	2.07
	Forfeited		(25,418	)	$	6.25
	Outstanding at September 30, 2013		705,964		$	8.92
Phantom Share Units PSUs [Member]	'
Summarizes the Transactions of the SEUs	'
	The following table summarizes the transactions of the Company’s SEUs for the nine months ended September 30, 2013:
		Number			Weighted		Weighted
		of SEUs			Average		Average
					Exercise		Grant-Date
					Price		Fair Value
	Outstanding at December 31, 2012		623,828		$	2.95
	Granted – at discount		45,028		$	0	$	32.06
	– at market value		6,970		$	41.31	$	16.09
	Exercised		(276,118	)	$	2.29
	Forfeited		(2,361	)	$	10.38
	Outstanding at September 30, 2013		397,347		$	3.69

Reclassifications_Out_of_Accum1

Reclassifications Out of Accumulated Other Comprehensive Income/(Loss) (Tables)	9 Months Ended
	Sep. 30, 2013
Text Block [Abstract]	'
Summary of Reclassifications Out of Accumulated Other Comprehensive Loss	'
	Reclassifications out of accumulated other comprehensive loss for the first nine months of 2013 were:
	(in millions)		Amount			Affected Line Item in the
	Details about AOCL Components		Reclassified			Statement where
			from AOCL			Net Income is Presented
	Derivative instruments:
	Realized gain/(loss) on derivative instruments		$	(0.1	)	Cost of goods sold
				(0.1	)	Total before tax
				0		Income tax expense
				(0.1	)	Net of tax
	Defined benefit pension plan items:
	Amortization of prior service credit			(0.9	)	See (1) below
	Amortization of actuarial net losses			5		See (1) below
				4.1		Total before tax
				(0.8	)	Income tax expense
				3.3		Net of tax
	Total reclassifications		$	3.2		Net of tax
	(1)	These items are included in the computation of net periodic pension cost. See Note 6 for additional information.
Changes in Accumulated Other Comprehensive Loss	'
	Changes in accumulated other comprehensive loss for the first nine months of 2013, net of tax, were:
	(in millions)		Unrealized			Defined			Cumulative			Total
			Gains/			Benefit			Translation
			(Losses) on			Pension			Adjustments
			Derivative			Plan Items
			Instruments
	Balance at December 31, 2012		$	0.1		$	(136.6	)	$	(34.9	)	$	(171.4	)
	Other comprehensive income/(loss) before reclassifications			0			0			(1.6	)		(1.6	)
	Amounts reclassified from AOCL			(0.1	)		3.3			0			3.2
	Net current period other comprehensive income/(loss)			(0.1	)		3.3			(1.6	)		1.6
	Balance at September 30, 2013		$	0		$	(133.3	)	$	(36.5	)	$	(169.8	)

Segmental_Reporting_Additional

Segmental Reporting - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013
	Segment
Segment Reporting [Abstract]	'
Number of segments	3

Segmental_Reporting_Segmental_

Segmental Reporting - Segmental Reporting (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segmental reporting	'	'	'	'
Net sales	$192.80	$183.40	$577.20	$562.70
Gross profit	57.4	50.7	180.6	171.4
Operating income	19.5	17.3	64	72.6
Pension credit/(charge)	-0.7	0	-2.1	0.2
Restructuring charge	0	-0.1	0	-0.2
Impairment of Octane Additives segment goodwill	-0.4	-0.3	-1	-0.9
Profit on disposal	0	0.1	0	0.1
Operating Segments [Member] | Fuel Specialties [Member]	'	'	'	'
Segmental reporting	'	'	'	'
Net sales	137.4	127	403.6	372.2
Gross profit	42.6	36.8	130.1	110.2
Operating income	22.3	19.6	66.4	58.2
Operating Segments [Member] | Performance Chemicals [Member]	'	'	'	'
Segmental reporting	'	'	'	'
Net sales	47.9	46.8	140.2	138.2
Gross profit	11.1	10.4	32.9	33.6
Operating income	5.6	5.6	17.1	18.8
Operating Segments [Member] | Octane Additives [Member]	'	'	'	'
Segmental reporting	'	'	'	'
Net sales	7.5	9.6	33.4	52.3
Gross profit	3.7	3.5	17.6	27.6
Operating income	2.1	1.5	13	21.9
Segment Reconciling Items [Member]	'	'	'	'
Segmental reporting	'	'	'	'
Pension credit/(charge)	-0.7	0	-2.1	0.2
Restructuring charge	0	-0.1	0	-0.2
Impairment of Octane Additives segment goodwill	-0.4	-0.3	-1	-0.9
Profit on disposal	0	0.1	0	0.1
Corporate, Non-Segment [Member]	'	'	'	'
Segmental reporting	'	'	'	'
Corporate costs	($9.40)	($9.10)	($29.40)	($25.50)

Segmental_Reporting_Summary_of

Segmental Reporting - Summary of Segment Depreciation and Amortization (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Summary of segment depreciation and amortization	'	'	'	'
Depreciation	$2.10	$1.60	$6.50	$4.90
Amortization	2.4	1.1	6.6	3.1
Operating Segments [Member] | Fuel Specialties [Member]	'	'	'	'
Summary of segment depreciation and amortization	'	'	'	'
Depreciation	0.5	0.4	1.7	1.4
Amortization	1.6	0.6	4.8	1.6
Operating Segments [Member] | Performance Chemicals [Member]	'	'	'	'
Summary of segment depreciation and amortization	'	'	'	'
Depreciation	0.9	0.6	2.6	1.8
Amortization	0.6	0.3	1.3	1
Operating Segments [Member] | Octane Additives [Member]	'	'	'	'
Summary of segment depreciation and amortization	'	'	'	'
Depreciation	0.1	0.2	0.5	0.5
Amortization	0.2	0.2	0.5	0.5
Corporate, Non-Segment [Member]	'	'	'	'
Summary of segment depreciation and amortization	'	'	'	'
Depreciation	$0.60	$0.40	$1.70	$1.20

Earnings_Per_Share_Summary_of_

Earnings Per Share - Summary of Earnings Per Share (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Share data in Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Numerator (in millions):	'	'	'	'
Net income available to common stockholders	$14	$15.50	$49.10	$55.60
Denominator (in thousands):	'	'	'	'
Weighted average common shares outstanding	23,621	23,240	23,518	23,148
Dilutive effect of stock options and awards	475	683	567	724
Denominator for diluted earnings per share	24,096	23,923	24,085	23,872
Net income per share, basic:	$0.59	$0.67	$2.09	$2.40
Net income per share, diluted:	$0.58	$0.65	$2.04	$2.33

Earnings_Per_Share_Additional_

Earnings Per Share - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]	'	'	'	'
Average number of anti-dilutive options excluded from the calculation of diluted earnings per share	'	1,380	'	1,380

Goodwill_Summarizes_Goodwill_M

Goodwill - Summarizes Goodwill Movement (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Goodwill And Intangible Assets Disclosure [Abstract]	'	'	'	'
At January 1, Gross cost	'	'	$384.20	$375.50
At January 1, Accumulated impairment losses	'	'	-235.2	-234
At January 1, Net book amount	'	'	149	141.5
Exchange effect	'	'	-0.1	-0.1
Acquisitions	'	'	17	0
Adjustments to purchase price allocation	'	'	0.4	0
Impairment losses	-0.4	-0.3	-1	-0.9
At September 30, Gross cost	401.5	375.4	401.5	375.4
At September 30, Accumulated impairment losses	-236.2	-234.9	-236.2	-234.9
At September 30, Net book amount	$165.30	$140.50	$165.30	$140.50

Goodwill_Summarizes_Goodwill_M1

Goodwill - Summarizes Goodwill Movement (Parenthetical) (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Millions, unless otherwise specified
Goodwill And Intangible Assets Disclosure [Abstract]	'	'
Historical accumulated amortization	$298.50	$298.50

Goodwill_Additional_Informatio

Goodwill - Additional Information (Detail) (USD $)	1 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Aug. 30, 2013	Sep. 30, 2013	Aug. 30, 2013	Jun. 30, 2013	Sep. 30, 2013	Dec. 24, 2012
		Chemsil and Chemtec [Member]	Chemsil and Chemtec [Member]	Strata [Member]	Strata [Member]	Strata [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'
Voting equity interests acquired	'	'	100.00%	'	'	100.00%
Annual sales	'	$40	'	'	'	'
Date of acquisition	'	30-Aug-13	'	'	24-Dec-12	'
Purchase price of cash	51.2	'	'	'	'	'
Purchase price of common stock	6.2	'	'	'	'	'
Reduction in other net assets	'	'	'	$0.40	'	'

Goodwill_Schedule_of_Consolida

Goodwill - Schedule of Consolidated Income Statement Included Revenue and Earnings (Detail) (USD $)	3 Months Ended		9 Months Ended		1 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013
					Chemsil and Chemtec [Member]
Business Acquisition [Line Items]	'	'	'	'	'
Net sales	$192.80	$183.40	$577.20	$562.70	$3.10
Net income	$14	$15.50	$49.10	$55.60	$0.20

Goodwill_Schedule_of_Pro_forma

Goodwill - Schedule of Pro forma Financial Information (Detail) (USD $)	9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Goodwill And Intangible Assets Disclosure [Abstract]	'	'
Net sales	$604.70	$604.60
Net income	$50.20	$59
Earnings per share - basic	$2.13	$2.55
Earnings per share - diluted	$2.08	$2.47

Goodwill_Purchase_Price_and_Fa

Goodwill - Purchase Price and Fair Values of Assets Acquired and Liabilities Assumed (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
In Millions, unless otherwise specified
Business Acquisition [Line Items]	'	'	'	'
Goodwill	$165.30	$149	$140.50	$141.50
Chemsil and Chemtec [Member]	'	'	'	'
Business Acquisition [Line Items]	'	'	'	'
Other intangible assets	33.7	'	'	'
Goodwill	17	'	'	'
Other net assets	6.7	'	'	'
Purchase price, net of cash acquired	$57.40	'	'	'

Other_Intangible_Assets_Summar

Other Intangible Assets - Summary of Other Intangible Assets (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Goodwill And Intangible Assets Disclosure [Abstract]	'	'	'	'	'
Gross cost at January 1	'	'	$106.20	$51.20	'
Capitalization of internally developed software and other costs	'	'	9	6.4	'
Acquisitions	'	'	33.7	0	'
Exchange effect	'	'	0.1	0.2	'
Gross cost at September 30	149	57.8	149	57.8	'
Accumulated amortization at January 1	'	'	-37.6	-33.5	'
Amortization expense	-2.4	-1.1	-6.6	-3.1	'
Exchange effect	'	'	0	-0.2	'
Accumulated amortization at September 30	-44.2	-36.8	-44.2	-36.8	'
Net book amount at September 30	$104.80	$21	$104.80	$21	$68.60

Other_Intangible_Assets_Additi

Other Intangible Assets - Additional Information (Detail) (USD $)

3 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

1 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Dec. 24, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Aug. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Internally Developed Software and Other Costs [Member]

Internally Developed Software and Other Costs [Member]

Others [Member]

Cost of Goods Sold [Member]

Cost of Goods Sold [Member]

Selling, General and Administrative Expenses [Member]

Selling, General and Administrative Expenses [Member]

Strata [Member]

Strata [Member]

Strata [Member]

Strata [Member]

Strata [Member]

Strata [Member]

Strata [Member]

Strata [Member]

Strata [Member]

Strata [Member]

Strata [Member]

Chemsil and Chemtec [Member]

Chemsil and Chemtec [Member]

Chemsil and Chemtec [Member]

Chemsil and Chemtec [Member]

Others [Member]

Others [Member]

Others [Member]

Others [Member]

Technology [Member]

Customer Relationships [Member]

Non-Compete Agreements [Member]

Cost of Goods Sold [Member]

Cost of Goods Sold [Member]

Selling, General and Administrative Expenses [Member]

Selling, General and Administrative Expenses [Member]

Selling, General and Administrative Expenses [Member]

Selling, General and Administrative Expenses [Member]

Administrative Expenses [Member]

Administrative Expenses [Member]

Technology [Member]

Technology [Member]

Customer Relationships [Member]

Customer Relationships [Member]

Non-Compete Agreements [Member]

Non-Compete Agreements [Member]

Finite-Lived Intangible Assets [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of voting equity interest acquired

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

Allocation of purchase price to other intangible assets

'

'

'

'

'

'

'

'

'

'

'

'

'

$48

'

$18.30

$28.20

$1.50

'

'

'

'

'

'

$33.70

'

'

'

Weighted average expected life

'

'

'

'

'

'

'

'

'

'

'

'

'

'13 years 1 month 6 days

'

'16 years 6 months

'11 years 6 months

'2 years

'

'

'

'

'

'

'9 years

'

'

'

Amortization expense

2.4

1.1

6.6

3.1

'

'

0

0

'

2

2

1.1

1.1

'

'

'

'

'

0.8

0

1.8

0

0.6

0

'

'

0.3

0

Intangible asset

$149

$57.80

$149

$57.80

$106.20

$51.20

$19.10

$9.50

$48.20

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Assets being amortized duration

'

'

'

'

'

'

'

'

'13 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Pension_Plans_Defined_Benefit_

Pension Plans - Defined Benefit Pension Plan (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Plan net pension credit/(charge):	'	'	'	'
Service cost	($0.40)	($0.40)	($1.20)	($1.20)
Interest cost on projected benefit obligation	-7.6	-8	-23.2	-24
Expected return on plan assets	8.7	8.4	26.4	25.4
Amortization of prior service credit	0.3	0.3	0.9	0.9
Amortization of actuarial net losses	-1.7	-0.3	-5	-0.9
Total	($0.70)	$0	($2.10)	$0.20

Income_Taxes_RollForward_of_Un

Income Taxes - Roll-Forward of Unrecognized Tax Benefits and Associated Accrued Interest and Penalties (Detail) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Income Tax Contingency [Line Items]	'	'
Opening balance at January 1, 2013	$12.80	'
Additions for tax positions of prior periods	0.3	'
Reductions due to lapsed statutes of limitations	-0.6	'
Closing balance at September 30, 2013	12.5	'
Current	-5.4	-3
Non-current	7.1	9.8
Interest and Penalties [Member]	'	'
Income Tax Contingency [Line Items]	'	'
Opening balance at January 1, 2013	0.6	'
Additions for tax positions of prior periods	0.2	'
Reductions due to lapsed statutes of limitations	-0.1	'
Closing balance at September 30, 2013	0.7	'
Current	-0.4	'
Non-current	0.3	'
Unrecognized Tax Benefits [Member]	'	'
Income Tax Contingency [Line Items]	'	'
Opening balance at January 1, 2013	12.2	'
Additions for tax positions of prior periods	0.1	'
Reductions due to lapsed statutes of limitations	-0.5	'
Closing balance at September 30, 2013	11.8	'
Current	-5	'
Non-current	$6.80	'

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'	'	'
Unrecognized tax benefits, interest and penalties	'	'	$12.50
Unremitted earnings	$717	$665	'

LongTerm_Debt_Schedule_of_Long

Long-Term Debt - Schedule of Long-Term Debt (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Debt Instrument [Line Items]	'	'
Long-term debt	$93	$30
Less current portion	-5	-5
Long-term debt, net of current portion	88	25
Revolving Credit Facility [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	88	20
Promissory Note [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	$5	$10

LongTerm_Debt_Additional_Infor

Long-Term Debt - Additional Information (Detail) (USD $)	9 Months Ended		3 Months Ended	9 Months Ended		1 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2013	Aug. 28, 2013	Aug. 28, 2013	Aug. 28, 2013
			Revolving Credit Facility [Member]	Revolving Credit Facility [Member]	Revolving Credit Facility [Member]	Additional Amount to be Committed by Lenders [Member]	Amended Credit Facility [Member]
							Revolving Credit Facility [Member]
Schedule Of Debt Instruments [Line Items]	'	'	'	'	'	'	'
Revolving credit facility term	'	'	'	'5 years	'	'	'
Borrowing amount through revolving credit facility	'	'	'	'	$100	'	$150
Expiration date of facility	'	'	'	31-Dec-16	'	'	'
Additional borrowings	'	'	'	'	'	50	'
Refinancing costs	$0.70	$0	$0.70	'	'	'	'

Plant_Closure_Provisions_Movem

Plant Closure Provisions - Movements in Plant Closure and Restructuring Provisions (Detail) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]	'	'	'
Total at January 1	$30.40	$28.60	'
Charge for the period	2	2.1	'
Utilized in the period	-1.4	-2.2	'
Exchange effect	0.1	0	'
Closing balance at September 30	31.1	28.5	'
Due within one year	-3.7	-3.6	-5.1
Due after one year	27.4	24.9	25.3
Severance [Member]	'	'	'
Restructuring Cost and Reserve [Line Items]	'	'	'
Total at January 1	1.1	'	'
Charge for the period	0	'	'
Utilized in the period	-0.1	'	'
Exchange effect	0	'	'
Closing balance at September 30	1	'	'
Due within one year	0	'	'
Due after one year	1	'	'
Remediation [Member]	'	'	'
Restructuring Cost and Reserve [Line Items]	'	'	'
Total at January 1	29.3	'	'
Charge for the period	2	'	'
Utilized in the period	-1.3	'	'
Exchange effect	0.1	'	'
Closing balance at September 30	30.1	'	'
Due within one year	-3.7	'	'
Due after one year	$26.40	'	'

Plant_Closure_Provisions_Addit

Plant Closure Provisions - Additional Information (Detail) (Remediation [Member], USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
Remediation [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Accretion expense recognized	$2

Fair_Value_Measurements_Carryi

Fair Value Measurements - Carrying Amount and Fair Values of the Company's Assets and Liabilities Measured on a Recurring Basis (Detail) (Recurring [Member], USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Carrying Amount [Member]	'	'
Non-derivatives:	'	'
Cash and cash equivalents	$53.90	$22.40
Short-term investments	6.4	5.1
Non-derivatives:	'	'
Long-term debt (including current portion)	93	30
Carrying Amount [Member] | Non-financial Assets and Liabilities (Level 3 Measurement) [Member]	'	'
Non-financial liabilities (Level 3 measurement):	'	'
Acquisition-related contingent consideration	4.6	4.3
Carrying Amount [Member] | Non-financial Assets and Liabilities (Level 3 Measurement) [Member] | Octane Additives [Member]	'	'
Non-financial assets (Level 3 measurement):	'	'
Goodwill - Octane Additives	0.3	1.3
Carrying Amount [Member] | Non-financial Assets and Liabilities (Level 3 Measurement) [Member] | Phantom Share Units PSUs [Member]	'	'
Non-financial liabilities (Level 3 measurement):	'	'
Stock equivalent units	11.5	12.6
Carrying Amount [Member] | Derivatives (Level 1 Measurement) [Member]	'	'
Derivatives (Level 1 measurement):	'	'
Other non-current assets: Commodity swaps	0	0.1
Foreign currency forward exchange contracts	0.3	0.8
Fair Value [Member]	'	'
Non-derivatives:	'	'
Cash and cash equivalents	53.9	22.4
Short-term investments	6.4	5.1
Non-derivatives:	'	'
Long-term debt (including current portion)	93	30
Fair Value [Member] | Non-financial Assets and Liabilities (Level 3 Measurement) [Member]	'	'
Non-financial liabilities (Level 3 measurement):	'	'
Acquisition-related contingent consideration	4.6	4.3
Fair Value [Member] | Non-financial Assets and Liabilities (Level 3 Measurement) [Member] | Octane Additives [Member]	'	'
Non-financial assets (Level 3 measurement):	'	'
Goodwill - Octane Additives	0.3	1.3
Fair Value [Member] | Non-financial Assets and Liabilities (Level 3 Measurement) [Member] | Phantom Share Units PSUs [Member]	'	'
Non-financial liabilities (Level 3 measurement):	'	'
Stock equivalent units	11.5	12.6
Fair Value [Member] | Derivatives (Level 1 Measurement) [Member]	'	'
Derivatives (Level 1 measurement):	'	'
Other non-current assets: Commodity swaps	0	0.1
Foreign currency forward exchange contracts	$0.30	$0.80

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2012
Fair Value Disclosures [Abstract]	'
Gain or loss recognized in earnings	$0.10

Derivative_Instruments_and_Ris2

Derivative Instruments and Risk Management - Summary of Commodity Swaps (Detail) (Derivatives (Level 1 Measurement) [Member], Recurring [Member], USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Carrying Amount [Member]	'	'
Derivative [Line Items]	'	'
Commodity swaps	$0	$0.10
Fair Value [Member]	'	'
Derivative [Line Items]	'	'
Commodity swaps	$0	$0.10

Derivative_Instruments_and_Ris3

Derivative Instruments and Risk Management - Summary of Commodity Swaps (Parenthetical) (Detail)	Sep. 30, 2013	Dec. 31, 2012
	T	T
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'	'
Commodity swaps, notional quantity	0	275

Derivative_Instruments_and_Ris4

Derivative Instruments and Risk Management - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'
Maturity period of foreign currency forward exchange contracts	'4 years

Derivative_Instruments_and_Ris5

Derivative Instruments and Risk Management - Summary of Foreign Currency Forward Exchange Contracts Which Have Not Been Designated as Hedging Instruments, and Their Impact on the Income Statement (Detail) (Not Designated as Hedging Instrument [Member], Foreign Currency Forward Exchange Contracts [Member], Other Income/(Expense) [Member], USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Exchange Contracts [Member] | Other Income/(Expense) [Member]	'
Summary of foreign currency forward exchange contracts which have not been designated as hedging instruments, and their impact on the income statement	'
Amount of Gain/(Loss) Recognized in Income	($0.70)

Commitments_and_Contingencies_1

Commitments and Contingencies - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Sep. 19, 2012	Mar. 31, 2010	Sep. 30, 2013
Commitments And Contingencies Disclosure [Abstract]	'	'	'
Settlement to resolve investigation matters	'	$40.20	'
Litigation Settlement period for payment	'	'	'4 years
Stated claim inclusive of costs and expenses	42.3	'	'
Contingent liabilities	'	'	$5

Commitments_and_Contingencies_2

Commitments and Contingencies - Schedule of Expected Settlement Payment (Detail) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
Payment Of Commitment And Contingencies [Line Items]	'
Fines, penalties and disgorgements	$40.20
Fees and associated expenses	3.9
Less discounting to fair value	0
Government investigations and other matters Expenses, Total	44.1
Amounts paid	-39.8
Exchange effect	0.1
Expected total amounts paid	4.4
Due within one year	-4.4
Total long term amount	0
Government Authorities [Member]	'
Payment Of Commitment And Contingencies [Line Items]	'
Fines, penalties and disgorgements	40.2
Fees and associated expenses	0
Less discounting to fair value	0
Government investigations and other matters Expenses, Total	40.2
Amounts paid	-36.5
Exchange effect	0.1
Expected total amounts paid	3.8
Due within one year	-3.8
Total long term amount	0
Compliance Monitor [Member]	'
Payment Of Commitment And Contingencies [Line Items]	'
Fines, penalties and disgorgements	0
Fees and associated expenses	3.9
Less discounting to fair value	0
Government investigations and other matters Expenses, Total	3.9
Amounts paid	-3.3
Exchange effect	0
Expected total amounts paid	0.6
Due within one year	-0.6
Total long term amount	$0

Stockholders_Equity_and_StockB2

Stockholders' Equity and Stock-Based Compensation Plans - Additional Information (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2013
In Millions, except Share data, unless otherwise specified			Stock Options Plan [Member]	Stock Options Plan [Member]	Stock Options Plan [Member]	Stock Options Plan [Member]	Phantom Share Units PSUs [Member]	Phantom Share Units PSUs [Member]	Phantom Share Units PSUs [Member]	Phantom Share Units PSUs [Member]
			Executives		Minimum [Member]	Maximum [Member]			Minimum [Member]	Maximum [Member]
			Stock_Plan
			Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'	'	'	'	'
Common stock, shares authorized	40,000,000	40,000,000	'	'	'	'	'	'	'	'
Number of shares issued	29,554,500	29,554,500	'	'	'	'	'	'	'	'
Treasury stock, shares	5,799,296	6,222,076	'	'	'	'	'	'	'	'
Number of active stock option plans	'	'	5	'	'	'	'	'	'	'
Number of active stock option plans for employees	'	'	2	'	'	'	'	'	'	'
Number of active stock option plans for non-employee directors	'	'	1	'	'	'	'	'	'	'
Number of active stock option plans for key executives	'	'	1	'	'	'	'	'	'	'
Range of stock vesting period	'	'	'	'	'24 months	'6 years	'	'	'11 months	'4 years
Expiration term for stock granted	'	'	'10 years	'	'	'	'10 years	'	'	'
Aggregate number of shares of common stock reserved for issuance which can be granted	'	'	2,640,000	'	'	'	'	'	'	'
Number exercisable and fully vested	'	'	168,706	'	'	'	'	'	'	'
Fully vested stock options with performance conditions attached	'	'	88,266	'	'	'	65,762	'	'	'
Total compensation cost of SEUs	'	'	$1.90	$2.40	'	'	$6.30	$5.20	'	'
Total intrinsic value of options exercised	'	'	3.2	1.3	'	'	2.1	1.2	'	'
Total compensation cost related to non-vested stock options not yet recognized	'	'	$2.50	'	'	'	'	'	'	'
Expected compensation cost recognized over the weighted average period	'	'	'2 years 22 days	'	'	'	'11 months 23 days	'	'	'
Number of exercisable SEUs	'	'	'	'	'	'	72,104	'	'	'

Stockholders_Equity_and_StockB3

Stockholders' Equity and Stock-Based Compensation Plans - Summary of Transactions of the Company's Stock Option Plans (Detail) (Stock Options Plan [Member], USD $)	9 Months Ended
	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Outstanding, Number of Options, Beginning balance	1,001,241
Exercised, Number of Options	-353,048
Forfeited, Number of Options	-25,418
Outstanding, Number of Options, Ending balance	705,964
Outstanding, Weighted Average Exercise Price, Beginning balance	$6.27
Exercised, Weighted Average Exercise Price	$2.07
Forfeited, Weighted Average Exercise Price	$6.25
Outstanding, Weighted Average Exercise Price, Ending balance	$8.92
Discount [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Granted, Number of Options	61,028
Granted, Weighted Average Exercise Price	$0
Granted, Weighted Average Grant-Date Fair Value	$34
Market Value [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Granted, Number of Options	22,161
Granted, Weighted Average Exercise Price	$41.27
Granted, Weighted Average Grant-Date Fair Value	$16.09

Stockholders_Equity_and_StockB4

Stockholders' Equity and Stock-Based Compensation Plans - Summarizes the Transactions of the SEUs (Detail) (Phantom Share Units PSUs [Member], USD $)	9 Months Ended
	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Outstanding, Number of Options, Beginning balance	623,828
Exercised, Number of Options	-276,118
Forfeited, Number of Options	-2,361
Outstanding, Number of Options, Ending balance	397,347
Outstanding, Weighted Average Exercise Price, Beginning balance	$2.95
Exercised, Weighted Average Exercise Price	$2.29
Forfeited, Weighted Average Exercise Price	$10.38
Outstanding, Weighted Average Exercise Price, Ending balance	$3.69
Discount [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Granted, Number of Options	45,028
Granted, Weighted Average Exercise Price	$0
Granted, Weighted Average Grant-Date Fair Value	$32.06
Market Value [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Granted, Number of Options	6,970
Granted, Weighted Average Exercise Price	$41.31
Granted, Weighted Average Grant-Date Fair Value	$16.09

Reclassifications_Out_of_Accum2

Reclassifications Out of Accumulated Other Comprehensive Income/(Loss) - Summary of Reclassifications Out of Accumulated Other Comprehensive Loss (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Cost of goods sold	($135.40)	($132.70)	($396.60)	($391.30)
Income tax expense	-4.3	-1.5	-13	-12.9
Reclassification out of Accumulated Other Comprehensive Income [Member]	'	'	'	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Total reclassifications	'	'	3.2	'
Reclassification out of Accumulated Other Comprehensive Income [Member] | Derivative Instruments [Member]	'	'	'	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Cost of goods sold	'	'	-0.1	'
Total before tax	'	'	-0.1	'
Income tax expense	'	'	0	'
Total reclassifications	'	'	-0.1	'
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Pension Plan Items [Member]	'	'	'	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Amortization of prior service credit	'	'	-0.9	'
Amortization of actuarial net losses	'	'	5	'
Total before tax	'	'	4.1	'
Income tax expense	'	'	-0.8	'
Total reclassifications	'	'	$3.30	'

Reclassifications_Out_of_Accum3

Reclassifications Out of Accumulated Other Comprehensive Income/(Loss) - Changes in Accumulated Other Comprehensive Loss (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Opening balance	'	'	($171.40)	'
Other comprehensive income/(loss) before reclassifications	'	'	-1.6	'
Amounts reclassified from AOCL	'	'	3.2	'
Total other comprehensive income/(loss)	3.4	1.7	1.6	2.8
Closing balance	-169.8	'	-169.8	'
Unrealized Gains/(Losses) on Derivative Instruments [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Opening balance	'	'	0.1	'
Other comprehensive income/(loss) before reclassifications	'	'	0	'
Amounts reclassified from AOCL	'	'	-0.1	'
Total other comprehensive income/(loss)	'	'	-0.1	'
Closing balance	0	'	0	'
Cumulative Translation Adjustments [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Opening balance	'	'	-34.9	'
Other comprehensive income/(loss) before reclassifications	'	'	-1.6	'
Amounts reclassified from AOCL	'	'	0	'
Total other comprehensive income/(loss)	'	'	-1.6	'
Closing balance	-36.5	'	-36.5	'
Defined Benefit Pension Plan Items [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Opening balance	'	'	-136.6	'
Other comprehensive income/(loss) before reclassifications	'	'	0	'
Amounts reclassified from AOCL	'	'	3.3	'
Total other comprehensive income/(loss)	'	'	3.3	'
Closing balance	($133.30)	'	($133.30)	'

Related_Party_Transactions_Add

Related Party Transactions - Additional Information (Detail) (USD $)	9 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Related Party Transactions [Abstract]	'	'
Fees payable to Smith, Gambrell & Russell	$0.90	$0.80
Amount due to Smith, Gambrell & Russell	$0.80	$0

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended		1 Months Ended
In Millions, except Share data, unless otherwise specified	Aug. 30, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Nov. 04, 2013
						Subsequent Event [Member]
						Bachman Group Companies [Member]
Subsequent Event [Line Items]	'	'	'	'	'	'
Date of acquisition	'	'	'	'	'	4-Nov-13
Percentage of voting equity interests acquired	'	'	'	'	'	100.00%
Business acquisition, consideration	$51.20	'	'	'	'	$45
Business acquisition, common stock issued	'	'	'	'	'	319,953
Purchase price of common stock	6.2	'	'	'	'	15
Annual sales	'	$192.80	$183.40	$577.20	$562.70	$80