XBRL Financials

Cover Page - shares	3 Months Ended
Cover Page - shares	Mar. 31, 2020	Apr. 30, 2020
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Document Quarterly Report	true
Document Transition Report	false
Current Fiscal Year End Date	--12-31
Document Period End Date	Mar. 31, 2020
Entity File Number	1-13879
Entity Registrant Name	INNOSPEC INC.
Entity Central Index Key	0001054905
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	98-0181725
Entity Address, Postal Zip Code	80112
City Area Code	303
Local Phone Number	792 5554
Security Exchange Name	NASDAQ
Title of 12(b) Security	Common stock
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		24,560,830
Entity Address, Address Line One	8310 South Valley Highway
Entity Address, Address Line Two	Suite 350
Entity Address, City or Town	Englewood
Entity Address, State or Province	CO
Trading Symbol	IOSP
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes

Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Net sales	$ 372.3	$ 388.3
Cost of goods sold	(258.4)	(270.5)
Gross profit	113.9	117.8
Operating expenses:
Selling, general and administrative	(64.4)	(72.5)
Research and development	(8.6)	(9.1)
Total operating expenses	(73.0)	(81.6)
Operating income	40.9	36.2
Other income, net	3.9	4.1
Interest expense, net	(0.6)	(1.5)
Income before income tax expense	44.2	38.8
Income tax expense	(11.1)	(10.1)
Net income	$ 33.1	$ 28.7
Earnings per share:
Basic	$ 1.35	$ 1.17
Diluted	$ 1.34	$ 1.17
Weighted average shares outstanding (in thousands):
Basic	24,529	24,437
Diluted	24,742	24,594

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 33.1	$ 28.7
Changes in cumulative translation adjustment, net of tax of $1.6 million and $0.4 million respectively	(7.9)	(5.0)
Changes in unrealized gains on derivative instruments, net of tax of $0.0 million and $0.1 million respectively	0.0	(0.5)
Amortization of prior service credit, net of tax of $0.0 million and $0.0 million respectively	(0.2)	(0.2)
Amortization of actuarial net losses, net of tax of $0.0 million and $0.0 million respectively	0.2	(0.0)
Total other comprehensive loss	(7.9)	(5.7)
Total comprehensive income	$ 25.2	$ 23.0

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

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+ Details

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Changes in cumulative translation adjustment, tax	$ 1.6	$ 0.4
Unrealized gains on derivative instruments, tax	0.0	0.1
Amortization of prior service credit, tax	0.0	0.0
Amortization of actuarial net losses, tax	$ 0.0	$ 0.0

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 68.1	$ 75.7
Trade and other accounts receivable (less allowances of $3.8 million and $3.8 million respectively)	296.3	292.0
Inventories (less allowances of $14.7 million and $14.5 million respectively):
Finished goods	171.8	173.9
Raw materials	74.2	70.7
Total inventories	246.0	244.6
Prepaid expenses	11.6	14.7
Prepaid income taxes	4.7	2.5
Other current assets	0.0	0.8
Total current assets	626.7	630.3
Net property, plant and equipment	197.8	198.7
Operating lease right-of-use assets	31.7	32.4
Goodwill	361.2	363.0
Other intangible assets	107.1	113.5
Deferred tax assets	8.8	9.1
Pension asset	117.3	115.9
Other non-current assets	4.7	5.9
Total assets	1,455.3	1,468.8
Current liabilities:
Accounts payable	108.4	122.0
Accrued liabilities	127.9	154.0
Current portion of finance leases	0.8	1.0
Current portion of plant closure provisions	5.6	5.6
Current portion of accrued income taxes	12.3	10.3
Current portion of operating lease liabilities	11.1	10.6
Total current liabilities	266.1	303.5
Long-term debt	58.7	58.6
Finance leases, net of current portion	0.4	0.5
Plant closure provisions, net of current portion	43.7	43.7
Accrued income taxes, net of current portion	36.2	36.2
Unrecognized tax benefits	16.4	16.4
Operating lease liabilities, net of current portion	20.7	21.9
Deferred tax liabilities	49.9	49.6
Pension liabilities and post-employment benefits	17.4	17.8
Other non-current liabilities	1.5	1.7
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	331.2	330.4
Treasury stock (4,993,670 and 5,047,278 shares at cost, respectively)	(94.0)	(93.3)
Retained earnings	788.6	755.5
Accumulated other comprehensive loss	(82.3)	(74.4)
Total Innospec stockholders' equity	943.8	918.5
Non-controlling interest	0.5	0.4
Total equity	944.3	918.9
Total liabilities and equity	$ 1,455.3	$ 1,468.8

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Allowances for doubtful accounts	$ 3.8	$ 3.8
Inventory allowances	$ 14.7	$ 14.5
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	4,993,670	5,047,278

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash Flows from Operating Activities
Net income	$ 33.1	$ 28.7
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	12.0	11.6
Deferred tax expense	0.7	0.2
Cash contributions to defined benefit pension plans	(0.0)	(0.3)
Non-cash movements on defined benefit pension plans	(1.2)	(1.6)
Stock option compensation	1.2	1.6
Changes in assets and liabilities, net of effects of acquired and divested companies:
Trade and other accounts receivable	(7.9)	(18.5)
Inventories	(5.0)	(1.8)
Prepaid expenses	2.1	(0.1)
Accounts payable and accrued liabilities	(36.0)	(10.9)
Accrued income taxes	1.6	4.4
Plant closure provisions	0.1	0.4
Unrecognized tax benefits	(0.0)	0.3
Other assets and liabilities	1.7	(0.8)
Net cash provided by operating activities	2.4	13.2
Cash Flows from Investing Activities
Capital expenditures	(7.8)	(10.7)
Internally developed software	(0.0)	(0.5)
Net cash used in investing activities	(7.8)	(11.2)
Cash Flows from Financing Activities
Non-controlling interest	0.1	0.0
Repayments of finance leases	(0.3)	(0.6)
Issue of treasury stock	0.7	1.0
Repurchase of common stock	(2.1)	(1.9)
Net cash used in financing activities	(1.6)	(1.5)
Effect of foreign currency exchange rate changes on cash	(0.6)	(0.1)
Net change in cash and cash equivalents	(7.6)	0.4
Cash and cash equivalents at beginning of period	75.7	123.1
Cash and cash equivalents at end of period	$ 68.1	$ 123.5

Condensed Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Cash Flows [Abstract]
Amortization of deferred finance costs	$ 0.1	$ 0.2

Condensed Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Non-Controlling Interest [Member]
Beginning Balance at Dec. 31, 2018	$ 825.5	$ 0.3	$ 324.9	$ (92.8)	$ 668.3	$ (75.7)	$ 0.5
Net income	28.7				28.7
Changes in cumulative translation adjustment, net of tax	(5.0)					(5.0)
Changes in unrealized gains on derivative instruments, net of tax	(0.5)					(0.5)
Treasury stock reissued	0.7		(0.5)	1.2
Treasury stock repurchased	(1.9)			(1.9)
Stock option compensation	1.6		1.6
Amortization of prior service credit, net of tax	(0.2)					(0.2)
Amortization of actuarial net losses, net of tax	(0.0)					(0.0)
Ending Balance at Mar. 31, 2019	848.9	0.3	326.0	(93.5)	697.0	(81.4)	0.5
Beginning Balance at Dec. 31, 2019	918.9	0.3	330.4	(93.3)	755.5	(74.4)	0.4
Net income	33.1				33.1
Changes in cumulative translation adjustment, net of tax	(7.9)					(7.9)
Non-controlling interest investment	0.1						0.1
Changes in unrealized gains on derivative instruments, net of tax	0.0
Treasury stock reissued	1.0		(0.4)	1.4
Treasury stock repurchased	(2.1)			(2.1)
Stock option compensation	1.2		1.2
Amortization of prior service credit, net of tax	(0.2)					(0.2)
Amortization of actuarial net losses, net of tax	0.2					0.2
Ending Balance at Mar. 31, 2020	$ 944.3	$ 0.3	$ 331.2	$ (94.0)	$ 788.6	$ (82.3)	$ 0.5

Basis of Presentation	3 Months Ended
Basis of Presentation	Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	NOTE 1 – BASIS OF PRESENTATION The accompanying unaudited interim condensed 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 condensed consolidated financial statements to be fairly stated. These condensed consolidated 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 for the year ended December 31, 2019 filed on February 19, 2020 (the “2019 Form 10-K”). 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 “Innospec,” “the Corporation,” “the Company,” “Registrant,” “we,” “us” and “our,” we are referring to Innospec Inc. and its consolidated subsidiaries unless otherwise indicated or the context otherwise requires. Credit losses With an effective date of January 1, 2020, we have applied Accounting Standards Update (ASU) No. 2016-13, Financial Instruments — Credit Losses (ASC Topic 326). This replaces the incurred loss impairment methodology under previous GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The standard was adopted using prospective application and principally impacts the allowance for trade and other accounts receivables. Upon adoption, there was no adjustment made to opening retained earnings as at January 1, 2020. As a result of implementing the standard, the Company did not recognize any material change to the allowance within trade and other accounts receivable as at January 1, 2020. Trade and other accounts receivable are shown net of a $3.8 million allowance at March 31, 2020. The allowance remains immaterial to the financial statements. The Company is exposed to credit losses primarily through sales of products. The Company’s expected loss allowance methodology for trade and other accounts receivable is developed using historical collection experience, current and future economic and market conditions and a review of the current status of customers’ receivables. Due to the short-term nature of such receivables, the estimate of accounts receivable amounts that may not be collected is based on aging of the accounts receivable balances and the financial condition of customers. Additionally, a further allowance is included to account for the Company’s historic track record of credit losses, for balances which are not aged sufficiently to be considered under the aging based approach. The Company considered the current and expected future economic and market conditions surrounding the COVID-19 pandemic and determined that the estimate of credit losses was not significantly impacted.

Segment Reporting

3 Months Ended

Mar. 31, 2020

Segment Reporting [Abstract]

Segment Reporting

NOTE 2 – SEGMENT REPORTING

The Company reports its financial performance based on the following four reportable segments: Fuel Specialties, Performance Chemicals, Oilfield Services and Octane Additives.

The Fuel Specialties, Performance Chemicals and Oilfield Services segments operate in markets where we actively seek growth opportunities although their ultimate customers are different. The Octane Additives segment revenues may conclude in 2020 as our one remaining refinery customer transitions to unleaded fuel.

The Company evaluates the performance of its segments based on operating income. The following tables analyze sales and other financial information by the Company’s reportable segments:


	Three Months Ended March 31
(in millions)	2020			2019
Net Sales:
Refinery and Performance		108.6		$	117.3
Other		38.4			38.7

Fuel Specialties		147.0			156.0

Personal Care		63.0			61.0
Home Care		21.6			27.0
Other		28.5			30.1

Performance Chemicals		113.1			118.1

Oilfield Services		112.2			114.2

	$	372.3		$	388.3

Gross profit/(loss):
Fuel Specialties	$	51.2		$	55.7
Performance Chemicals		27.6			26.6
Oilfield Services		36.2			37.7
Octane Additives		(1.1	)		(2.2	)

	$	113.9		$	117.8

Operating income/(loss):
Fuel Specialties	$	32.1		$	32.9
Performance Chemicals		15.6			13.5
Oilfield Services		7.2			7.8
Octane Additives		(1.2	)		(2.8	)
Corporate costs		(12.8	)		(15.2	)

Total operating income	$	40.9		$	36.2

The following table presents a summary of the depreciation and amortization charges incurred by the Company’s reportable segments:


	Three Months Ended March 31
(in millions)	2020		2019
Depreciation:
Fuel Specialties	$	1.0	$	0.9
Performance Chemicals		2.8		2.5
Oilfield Services		1.7		1.7
Octane Additives		0.3		0.3
Corporate		0.3		0.3

	$	6.1	$	5.7

Amortization:
Performance Chemicals		2.2		2.2
Oilfield Services		2.6		2.6
Corporate		1.0		0.9

	$	5.8	$	5.7

Earnings per Share

3 Months Ended

Mar. 31, 2020

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 under the treasury stock method. Per share amounts are computed as follows:


	Three Months Ended March 31
	2020		2019
Numerator (in millions):
Net income available to common stockholders	$	33.1	$	28.7

Denominator (in thousands):
Weighted average common shares outstanding		24,529		24,437
Dilutive effect of stock options and awards		213		157

Denominator for diluted earnings per share		24,742		24,594

Net income per share, basic:	$	1.35	$	1.17

Net income per share, diluted:	$	1.34	$	1.17

In the three months ended March 31, 2020, the average number of anti-dilutive options excluded from the calculation of diluted earnings per share

was

17,636 (three months ended March 31, 2019 – 12,539).

Goodwill

3 Months Ended

Mar. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

NOTE 4 – GOODWILL

The following table summarizes the goodwill movements:


(in millions)	Gross Cost			Accumulated Impairment Losses			Net Book Amount
Opening balance at January 1	$	599.5		$	(236.5	)	$	363.0
Exchange effect		(1.8	)		0.0			(1.8	)

Closing balance at March 31	$	597.7		$	(236.5	)	$	361.2

Other Intangible Assets

3 Months Ended

Mar. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Other Intangible Assets

NOTE 5 – OTHER INTANGIBLE ASSETS

The following table summarizes the other intangible assets movements:


(in millions)	2020
Gross cost at January 1	$	294.8
Exchange effect		(0.9	)
Gross cost at March 31		293.9
Accumulated amortization at January 1		(181.3	)
Amortization expense		(5.8	)
Exchange effect		0.3
Accumulated amortization at March 31		(186.8	)

Net book amount at March 31	$	107.1

The amortization expense for the three months ended March 31, 2020 was $5.8 million (three months ended March 31, 2019 – $5.7 million)

.

The net book amount by category of other intangible asset

s

is shown in the following table:


(in millions)	March 31 2020		December 31 2019
Product rights	$	9.1	$	10.1
Brand names		2.7		2.9
Technology		31.7		32.6
Customer relationships		57.7		60.8
Internally developed software		5.9		7.1
	$	107.1	$	113.5

Pension and Post-Employment Benefits

3 Months Ended

Mar. 31, 2020

Retirement Benefits [Abstract]

Pension and Post-Employment Benefits

NOTE 6 – PENSION AND POST EMPLOYMENT BENEFITS

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.

The net service cost for the three months ended March 31, 2020 was $0.3 million (three months ended March 31, 2019 – $0.2 million) and has been recognized in selling, general and administrative expenses within corporate costs. The following table shows the income statement effect recognized within other income, net:


	Three Months Ended March 31
(in millions)	2020			2019
Plan net pension credit/(charge):
Interest cost on projected benefit obligation	$	(2.8	)	$	(3.9	)
Expected return on plan assets		4.5			5.6
Amortization of prior service credit		0.2			0.2
Amortization of actuarial net losses		(0.2	)		0.0

	$	1.7		$	1.9

The amortization of prior service credit and actuarial net losses is a reclassification out of accumulated other comprehensive loss into other income and expense.

The Company also maintains an unfunded defined benefit pension plan covering a number of its current and former employees in Germany (the “German plan”) within our Fuel Specialties segment. The German plan is closed to new entrants and has no assets. The net service cost for the German plan for the three months ended March 31, 2020 was $0.0 million (three months ended March 31, 2019 – $0.0 million) and has been recognized in selling, general and administrative expenses. The following table shows the income statement effect recognized within other income and expense:


	Three Months Ended March 31
(in millions)	2020			2019
Plan net pension charge:
Interest cost on projected benefit obligation	$	0.0		$	(0.1	)
Amortization of actuarial net losses		(0.2	)		(0.1	)

	$	(0.2	)	$	(0.2	)

As at March 31, 2020, our Performance Chemicals segment has obligations for post-employment benefits in its European businesses with a liability of $4.5 million (December 31, 2019 – $4.5 million).

Income Taxes

3 Months Ended

Mar. 31, 2020

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)	Unrecognized Tax Benefits		Interest and Penalties		Total
Opening balance at January 1	$	14.4	$	2.0	$	16.4
Additions for tax positions of prior periods		0.0		0.0		0.0

Closing balance at March 31		14.4		2.0		16.4
Current		0.0		0.0		0.0

Non-current	$	14.4	$	2.0	$	16.4

All of the $16.4 million of unrecognized tax benefits, interest and penalties would impact our effective tax rate if recognized.

As previously disclosed, a non-U.S. subsidiary, Innospec Performance Chemicals Italia Srl, is subject to an ongoing tax audit in relation to the period 2011 to 2014 inclusive. The Company has determined that additional tax, interest and penalties totaling $3.1 million may arise as a consequence of the tax audit. This includes a reduction in interest accrued of $0.2 million recorded in the three months to March 31, 2020. As any additional tax arising as a consequence of the tax audit would be reimbursed by the previous owner under the terms of the sale and purchase agreement, an indemnification asset of the same amount is recorded in the financial statements to reflect this arrangement.

As previously disclosed, in 2018 the Company recorded an unrecognized tax benefit of $10.8 million which primarily relates to a potential adjustment that could arise as a consequence of the Tax Cuts and Jobs Act, but for which retrospective adjustment to the filed 2017 U.S. federal income tax returns was not permissible. The Company accrued a net increase in interest of $0.2 million in the three months to March 31, 2020 relating to this matter.

The Company and its U.S. subsidiaries remain open to examination by the IRS for years 2016 onwards under the statute of limitations. The Company’s subsidiaries in foreign tax jurisdictions are open to examination including Germany (2015 onwards), Switzerland (2015 onwards), Spain (2016 onwards), France (2017 onwards) and the United Kingdom (2018 onwards).

Long-Term Debt

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

Long-Term Debt

NOTE 8 – LONG-TERM DEBT

Long-term debt consists of the following:


(in millions)	March 31, 2020			December 31, 2019
Revolving credit facility	$	60.0		$	60.0
Deferred finance costs		(1.3	)		(1.4	)

		58.7			58.6
Less current portion		0.0			0.0

	$	58.7		$	58.6

Plant Closure Provisions

3 Months Ended

Mar. 31, 2020

Restructuring and Related Activities [Abstract]

Plant Closure Provisions

NOTE 9 – PLANT CLOSURE PROVISIONS

The Company has continuing plans to close some of its manufacturing facilities at sites around the world as and when those operations are expected to be decommissioned. The liability for estimated closure costs of Innospec’s manufacturing facilities includes costs for decontamination and environmental remediation activities (“remediation”).

As a result, the principal site giving rise to remediation liabilities is the manufacturing site at Ellesmere Port in the United Kingdom. There are also remediation liabilities on a much smaller scale in respect of our other manufacturing sites in the U.S. and Europe.

Movements in the provisions are summarized as follows:


(in millions)	2020
Total at January 1	$	49.3
Charge for the period		1.1
Utilized in the period		(1.0	)
Exchange effect		(0.1	)

Total at March 31		49.3
Due within one year		(5.6	)

Due after one year	$	43.7

The charge for the three months ended March 31, 2020 was $1.1 million (three months ended March 31, 2019 – $1.0 million)

Amounts due within one year refer to provisions where expenditure is expected to arise within one year of the balance sheet date.

Fair Value Measurements

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurements

NOTE 10 – FAIR VALUE MEASUREMENTS

The following table presents the carrying amount and fair values of the Company’s financial assets and liabilities measured on a recurring basis:


	March 31, 2020				December 31, 2019
(in millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets
Non-derivatives:
Cash and cash equivalents	$	68.1	$	68.1	$	75.7	$	75.7
Derivatives (Level 1 measurement):
Other current and non-current assets:
Foreign currency forward exchange contracts		0.0		0.0		0.8		0.8

Liabilities
Non-derivatives:
Long-term debt (including current portion)	$	58.7	$	58.7	$	58.6	$	58.6
Finance leases (including current portion)		1.2		1.2		1.5		1.5
Derivatives (Level 1 measurement):
Other current and non-current liabilities:
Foreign currency forward exchange contracts		1.3		1.3		0.0		0.0
Non-financial liabilities (Level 3 measurement):

Other current and non-current liabilities
Stock equivalent units		12.0		12.0		24.6		24.6

The following methods and assumptions were used to estimate the fair values of financial instruments:

Cash and cash equivalents:

The carrying amount approximates fair value because of the short-term maturities of such instruments.

Derivatives:

The fair value of derivatives relating to foreign currency forward exchange contracts and interest rate swaps are derived from current settlement prices and comparable contracts using current assumptions. 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.

Long-term debt and finance leases:

Long-term debt comprises the revolving credit facility, which is shown net of deferred finance costs that have been capitalized. Finance leases relate to certain fixed assets in our Fuel Specialties and Oilfield Services segments. The carrying amount of long-term debt and finance leases approximates to the fair value.

Stock equivalent units:

The fair values of stock equivalent units are calculated at each balance sheet date using either the Black-Scholes or Monte Carlo method depending on the terms of each grant.

Derivative Instruments and Risk Management	3 Months Ended
Derivative Instruments and Risk Management	Mar. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Risk Management	NOTE 11 – DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT The Company enters into various foreign currency forward exchange contracts to minimize currency exchange rate exposure from expected future cash flows. As at March 31, 2020 the contracts have maturity dates of up to twelve months 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 three months of 2020 was a gain of $1.9 million (first three months of 2019: gain of $0.2 million). As at March 31, 2020 and December 31, 2019 the Company did not hold any interest rate swaps. In prior years, the Company entered into interest rate swaps to minimize interest rate exposure related to a portion of its borrowing requirements. These interest rate swaps were designated as hedging instruments, and their impact on accumulated other comprehensive loss for the first three months of 2019 was a loss of $0.7 million.

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 12 – COMMITMENTS AND CONTINGENCIES 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 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 the 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 March 31, 2020, such guarantees which are not recognized as liabilities in the condensed consolidated financial statements amounted to $4.6 million (December 31, 2019–$4.7 million). The remaining terms of the fixed maturity guarantees vary from 1 month to 4 years, with some further guarantees having no fixed expiry date. Under the terms of the guarantee arrangements, generally the Company would be required to perform should the affiliated company fail to fulfill 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.

Stock-Based Compensation Plans

3 Months Ended

Mar. 31, 2020

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation Plans

NOTE 13 – STOCK-BASED COMPENSATION PLANS

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 following table summarizes the transactions of the Company’s stock option plans for the three months ended March 31, 2020:


	Number of Options			Weighted Average Exercise Price		Weighted Average Grant- Date Fair Value
Outstanding at December 31, 2019		504,459		$	33.05	$	41.35
Granted – at discount		61,678		$	0.00	$	77.83
– at market value		10,419		$	95.70	$	18.69
Exercised		(74,074	)	$	9.11	$	52.83
Forfeited		(10,250	)	$	13.80	$	47.17

Outstanding at March 31, 2020		492,232		$	34.24	$	43.59

At March 31, 2020, there were 49,444 stock options that were exercisable, of which 12,519 had performance conditions attached.

The stock option compensation cost for the first three months of 2020 was $1.2 million (first three months of 2019 – $1.6 million). The total intrinsic value of options exercised in the first three months of 2020 was $4.2 million (first three months of 2019 – $2.1 million).

The total compensation cost related to non-vested stock options not yet recognized at March 31, 2020 was $11.9 million and this cost is expected to be recognized over the weighted-average period of 2.11 years.

Stock equivalent units

The following table summarizes the transactions of the Company’s SEUs for the three months ended March 31, 2020:


	Number of SEUs			Weighted Average Exercise Price		Weighted Average Grant- Date Fair Value
Outstanding at December 31, 2019		390,816		$	3.69	$	59.91
Granted – at discount		103,607		$	0.00	$	77.33
– at market value		3,634		$	95.70	$	18.69
Exercised		(81,557	)	$	0.94	$	60.35
Forfeited		(9,536	)	$	1.53	$	58.85

Outstanding at March 31, 2020		406,964		$	4.17	$	63.92

At March 31, 2020 there were 63,196 SEUs that are exercisable, of which 56,664 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 SEU compensation for the first three months of 2020 was $6.0 million credit (first three months of 2019 – $7.5 million charge). The total intrinsic value of SEUs exercised in the first three months of 2020 was $5.6 million (first three months of 2019 – $6.2 million).

The weighted-average remaining vesting period of non-vested SEUs is 2.39 years.

Reclassifications out of Accumulated Other Comprehensive Loss

3 Months Ended

Mar. 31, 2020

Equity [Abstract]

Reclassifications out of Accumulated Other Comprehensive Loss

NOTE 14 – RECLASSIFICATIONS OUT OF ACCUMULATED OTHER COMPREHENSIVE LOSS

Reclassifications out of accumulated other comprehensive loss for the first quarter of 2020 were:


(in millions) Details about AOCL Components	Amount Reclassified from AOCL			Affected Line Item in the Statement where Net Income is Presented
Defined benefit pension plan items:
Amortization of prior service credit	$	(0.2	)		See (¹) below
Amortization of actuarial net losses		0.2			See (¹) below

		0.0			Total before tax
		0.0			Income tax expense

Total reclassifications	$	0.0			Net of tax

(1)	These items are included in other income and expense. See Note 6 of the Notes to the Condensed Consolidated Financial Statements for additional information.

Changes in accumulated other comprehensive loss for the first three months of 2020, net of tax, were:


(in millions)	Defined Benefit Pension Plan Items			Cumulative Translation Adjustments			Total
Balance at December 31, 2019	$	(9.3	)	$	(65.1	)	$	(74.4	)

Other comprehensive income before reclassifications		0.0			(7.9	)		(7.9	)
Amounts reclassified from AOCL		0.0			0.0			0.0

Total other comprehensive income		0.0			(7.9	)		(7.9	)

Balance at March 31, 2020	$	(9.3	)	$	(73.0	)	$	(82.3	)

Recently Issued Accounting Pronouncements	3 Months Ended
Recently Issued Accounting Pronouncements	Mar. 31, 2020
Accounting Changes and Error Corrections [Abstract]
Recently Issued Accounting Pronouncements	NOTE 15 – RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS In June 2016, the Financial Accounting Standards Board issued Accounting Standards Update (ASU) No. 2016-13, Financial Instruments – Credit Losses (Topic 326). As disclosed in the Basis of Preparation, the Company adopted this standard from January 1, 2020. In December 2019, the Financial Accounting Standards Board issued Accounting Standards Update (ASU) No. 2019-12, Simplifying the Accounting for Income Taxes (Topic 740), which removes certain exceptions to the general principles in Topic 740 and improves consistent application of and simplifies GAAP for other areas of Topic 740 by clarifying and amending existing guidance. This ASU is effective for fiscal years beginning after December 15, 2020, and interim periods within those fiscal years, with early adoption permitted. The Company is evaluating the effect of adopting this new accounting guidance but does not expect adoption will have a material impact on the Company’s disclosures.

Related Party Transactions	3 Months Ended
Related Party Transactions	Mar. 31, 2020
Related Party Transactions [Abstract]
Related Party Transactions	NOTE 16 – RELATED PARTY TRANSACTIONS Mr. Patrick S. Williams has been an executive director of the Company since April 2009 and has been a non-executive director of AdvanSix, a chemicals manufacturer, since February 2020. In the first three months of 2020 the Company purchased product from AdvanSix for $0.1 million. As at March 31, 2020, the Company owed $0.0 million to AdvanSix. 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 three months of 2020 the Company incurred fees from SGR of $0.1 million (first three months of 2019 – $0.2 million). As at March 31, 2020, the Company owed $0.0 million to SGR (December 31, 2019 – $0.0 million). Mr. David F. Landless has been a non-executive director of the Company since January 1, 2016 and is a non-executive director of Ausurus Group Limited which owns European Metal Recycling Limited (“EMR”). The Company has sold scrap metal to EMR in the first three months of 2020 for a value of $0.1 million (first three months of 2019 – $0.3 million). A tendering process is operated periodically to select the best buyer for the sale of scrap metal by the Company. As at March 31, 2020 EMR owed $0.1 million for scrap metal purchased from the Company (December 31, 2019 – $0.0 million).

Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2020

Segment Reporting [Abstract]

Segment Reporting

The Company evaluates the performance of its segments based on operating income. The following tables analyze sales and other financial information by the Company’s reportable segments:


	Three Months Ended March 31
(in millions)	2020			2019
Net Sales:
Refinery and Performance		108.6		$	117.3
Other		38.4			38.7

Fuel Specialties		147.0			156.0

Personal Care		63.0			61.0
Home Care		21.6			27.0
Other		28.5			30.1

Performance Chemicals		113.1			118.1

Oilfield Services		112.2			114.2

	$	372.3		$	388.3

Gross profit/(loss):
Fuel Specialties	$	51.2		$	55.7
Performance Chemicals		27.6			26.6
Oilfield Services		36.2			37.7
Octane Additives		(1.1	)		(2.2	)

	$	113.9		$	117.8

Operating income/(loss):
Fuel Specialties	$	32.1		$	32.9
Performance Chemicals		15.6			13.5
Oilfield Services		7.2			7.8
Octane Additives		(1.2	)		(2.8	)
Corporate costs		(12.8	)		(15.2	)

Total operating income	$	40.9		$	36.2

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 March 31
(in millions)	2020		2019
Depreciation:
Fuel Specialties	$	1.0	$	0.9
Performance Chemicals		2.8		2.5
Oilfield Services		1.7		1.7
Octane Additives		0.3		0.3
Corporate		0.3		0.3

	$	6.1	$	5.7

Amortization:
Performance Chemicals		2.2		2.2
Oilfield Services		2.6		2.6
Corporate		1.0		0.9

	$	5.8	$	5.7

Earnings per Share (Tables)

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Summary of Earnings Per Share

Per share amounts are computed as follows:


	Three Months Ended March 31
	2020		2019
Numerator (in millions):
Net income available to common stockholders	$	33.1	$	28.7

Denominator (in thousands):
Weighted average common shares outstanding		24,529		24,437
Dilutive effect of stock options and awards		213		157

Denominator for diluted earnings per share		24,742		24,594

Net income per share, basic:	$	1.35	$	1.17

Net income per share, diluted:	$	1.34	$	1.17

Goodwill (Tables)

3 Months Ended

Mar. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Goodwill

The following table summarizes the goodwill movements:


(in millions)	Gross Cost			Accumulated Impairment Losses			Net Book Amount
Opening balance at January 1	$	599.5		$	(236.5	)	$	363.0
Exchange effect		(1.8	)		0.0			(1.8	)

Closing balance at March 31	$	597.7		$	(236.5	)	$	361.2

Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Other Intangible Assets

The following table summarizes the other intangible assets movements:


(in millions)	2020
Gross cost at January 1	$	294.8
Exchange effect		(0.9	)
Gross cost at March 31		293.9
Accumulated amortization at January 1		(181.3	)
Amortization expense		(5.8	)
Exchange effect		0.3
Accumulated amortization at March 31		(186.8	)

Net book amount at March 31	$	107.1

Schedule of Amortization Expense

The net book amount by category of other intangible asset

s

is shown in the following table:


(in millions)	March 31 2020		December 31 2019
Product rights	$	9.1	$	10.1
Brand names		2.7		2.9
Technology		31.7		32.6
Customer relationships		57.7		60.8
Internally developed software		5.9		7.1
	$	107.1	$	113.5

Pension and Post-Employment Benefits (Tables)

3 Months Ended

Mar. 31, 2020

United Kingdom Plan [Member]

Plan Net Pension Credit

The following table shows the income statement effect recognized within other income, net:


	Three Months Ended March 31
(in millions)	2020			2019
Plan net pension credit/(charge):
Interest cost on projected benefit obligation	$	(2.8	)	$	(3.9	)
Expected return on plan assets		4.5			5.6
Amortization of prior service credit		0.2			0.2
Amortization of actuarial net losses		(0.2	)		0.0

	$	1.7		$	1.9

German Plan [Member]

Plan Net Pension Credit

The following table shows the income statement effect recognized within other income and expense:


	Three Months Ended March 31
(in millions)	2020			2019
Plan net pension charge:
Interest cost on projected benefit obligation	$	0.0		$	(0.1	)
Amortization of actuarial net losses		(0.2	)		(0.1	)

	$	(0.2	)	$	(0.2	)

Income Taxes (Tables)

3 Months Ended

Mar. 31, 2020

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)	Unrecognized Tax Benefits		Interest and Penalties		Total
Opening balance at January 1	$	14.4	$	2.0	$	16.4
Additions for tax positions of prior periods		0.0		0.0		0.0

Closing balance at March 31		14.4		2.0		16.4
Current		0.0		0.0		0.0

Non-current	$	14.4	$	2.0	$	16.4

Long-Term Debt (Tables)

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

Schedule of Long-Term Debt

Long-term debt consists of the following:


(in millions)	March 31, 2020			December 31, 2019
Revolving credit facility	$	60.0		$	60.0
Deferred finance costs		(1.3	)		(1.4	)

		58.7			58.6
Less current portion		0.0			0.0

	$	58.7		$	58.6

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

+ Details

Plant Closure Provisions (Tables)

3 Months Ended

Mar. 31, 2020

Restructuring and Related Activities [Abstract]

Movements in Plant Closure and Restructuring Provisions

Movements in the provisions are summarized as follows:


(in millions)	2020
Total at January 1	$	49.3
Charge for the period		1.1
Utilized in the period		(1.0	)
Exchange effect		(0.1	)

Total at March 31		49.3
Due within one year		(5.6	)

Due after one year	$	43.7

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2020

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 financial assets and liabilities measured on a recurring basis:


	March 31, 2020				December 31, 2019
(in millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets
Non-derivatives:
Cash and cash equivalents	$	68.1	$	68.1	$	75.7	$	75.7
Derivatives (Level 1 measurement):
Other current and non-current assets:
Foreign currency forward exchange contracts		0.0		0.0		0.8		0.8

Liabilities
Non-derivatives:
Long-term debt (including current portion)	$	58.7	$	58.7	$	58.6	$	58.6
Finance leases (including current portion)		1.2		1.2		1.5		1.5
Derivatives (Level 1 measurement):
Other current and non-current liabilities:
Foreign currency forward exchange contracts		1.3		1.3		0.0		0.0
Non-financial liabilities (Level 3 measurement):

Other current and non-current liabilities
Stock equivalent units		12.0		12.0		24.6		24.6

Stock-Based Compensation Plans (Tables)

3 Months Ended

Mar. 31, 2020

Stock Options Plan [Member]

Summary of Transactions of Company's Stock Option Plans

The following table summarizes the transactions of the Company’s stock option plans for the three months ended March 31, 2020:


	Number of Options			Weighted Average Exercise Price		Weighted Average Grant- Date Fair Value
Outstanding at December 31, 2019		504,459		$	33.05	$	41.35
Granted – at discount		61,678		$	0.00	$	77.83
– at market value		10,419		$	95.70	$	18.69
Exercised		(74,074	)	$	9.11	$	52.83
Forfeited		(10,250	)	$	13.80	$	47.17

Outstanding at March 31, 2020		492,232		$	34.24	$	43.59

Stock Equivalent Units [Member]

Summarizes Transactions of SEUs

The following table summarizes the transactions of the Company’s SEUs for the three months ended March 31, 2020:


	Number of SEUs			Weighted Average Exercise Price		Weighted Average Grant- Date Fair Value
Outstanding at December 31, 2019		390,816		$	3.69	$	59.91
Granted – at discount		103,607		$	0.00	$	77.33
– at market value		3,634		$	95.70	$	18.69
Exercised		(81,557	)	$	0.94	$	60.35
Forfeited		(9,536	)	$	1.53	$	58.85

Outstanding at March 31, 2020		406,964		$	4.17	$	63.92

Reclassifications out of Accumulated Other Comprehensive Loss (Tables)

3 Months Ended

Mar. 31, 2020

Equity [Abstract]

Summary of Reclassifications Out of Accumulated Other Comprehensive Loss

Reclassifications out of accumulated other comprehensive loss for the first quarter of 2020 were:


(in millions) Details about AOCL Components	Amount Reclassified from AOCL			Affected Line Item in the Statement where Net Income is Presented
Defined benefit pension plan items:
Amortization of prior service credit	$	(0.2	)		See (¹) below
Amortization of actuarial net losses		0.2			See (¹) below

		0.0			Total before tax
		0.0			Income tax expense

Total reclassifications	$	0.0			Net of tax

(1)	These items are included in other income and expense. See Note 6 of the Notes to the Condensed Consolidated Financial Statements for additional information.

Changes in Accumulated Other Comprehensive Loss

Changes in accumulated other comprehensive loss for the first three months of 2020, net of tax, were:


(in millions)	Defined Benefit Pension Plan Items			Cumulative Translation Adjustments			Total
Balance at December 31, 2019	$	(9.3	)	$	(65.1	)	$	(74.4	)

Other comprehensive income before reclassifications		0.0			(7.9	)		(7.9	)
Amounts reclassified from AOCL		0.0			0.0			0.0

Total other comprehensive income		0.0			(7.9	)		(7.9	)

Balance at March 31, 2020	$	(9.3	)	$	(73.0	)	$	(82.3	)

Basis of Presentation - Addtional Information (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Allowances for doubtful accounts	$ 3.8	$ 3.8

Segment Reporting - Additional Information (Detail)	3 Months Ended
Segment Reporting - Additional Information (Detail)	Mar. 31, 2020 Segment
Segment Reporting [Abstract]
Number of reportable segments	4

Segment Reporting - Segment Reporting (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Net sales	$ 372.3	$ 388.3
Gross profit/(loss)	113.9	117.8
Operating income/(loss)	40.9	36.2
Operating Segments [Member] \| Fuel Specialties [Member]
Segment Reporting Information [Line Items]
Net sales	147.0	156.0
Gross profit/(loss)	51.2	55.7
Operating income/(loss)	32.1	32.9
Operating Segments [Member] \| Fuel Specialties [Member] \| Refinery and Performance [Member]
Segment Reporting Information [Line Items]
Net sales	108.6	117.3
Operating Segments [Member] \| Fuel Specialties [Member] \| Other [Member]
Segment Reporting Information [Line Items]
Net sales	38.4	38.7
Operating Segments [Member] \| Performance Chemicals [Member]
Segment Reporting Information [Line Items]
Net sales	113.1	118.1
Gross profit/(loss)	27.6	26.6
Operating income/(loss)	15.6	13.5
Operating Segments [Member] \| Performance Chemicals [Member] \| Personal Care [Member]
Segment Reporting Information [Line Items]
Net sales	63.0	61.0
Operating Segments [Member] \| Performance Chemicals [Member] \| Home Care [Member]
Segment Reporting Information [Line Items]
Net sales	21.6	27.0
Operating Segments [Member] \| Performance Chemicals [Member] \| Other [Member]
Segment Reporting Information [Line Items]
Net sales	28.5	30.1
Operating Segments [Member] \| Oilfield Services [Member]
Segment Reporting Information [Line Items]
Net sales	112.2	114.2
Gross profit/(loss)	36.2	37.7
Operating income/(loss)	7.2	7.8
Operating Segments [Member] \| Octane Additives [Member]
Segment Reporting Information [Line Items]
Gross profit/(loss)	(1.1)	(2.2)
Operating income/(loss)	(1.2)	(2.8)
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Corporate costs	$ (12.8)	$ (15.2)

Segment Reporting - Summary of Segment Depreciation and Amortization (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Summary of segment depreciation and amortization
Depreciation	$ 6.1	$ 5.7
Amortization	5.8	5.7
Operating Segments [Member] \| Fuel Specialties [Member]
Summary of segment depreciation and amortization
Depreciation	1.0	0.9
Operating Segments [Member] \| Performance Chemicals [Member]
Summary of segment depreciation and amortization
Depreciation	2.8	2.5
Amortization	2.2	2.2
Operating Segments [Member] \| Oilfield Services [Member]
Summary of segment depreciation and amortization
Depreciation	1.7	1.7
Amortization	2.6	2.6
Operating Segments [Member] \| Octane Additives [Member]
Summary of segment depreciation and amortization
Depreciation	0.3	0.3
Corporate, Non-Segment [Member]
Summary of segment depreciation and amortization
Depreciation	0.3	0.3
Amortization	$ 1.0	$ 0.9

Earnings Per Share - Additional Information (Detail) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Average number of anti-dilutive options excluded from the calculation of diluted earnings per share	17,636	12,539

Earnings Per Share - Summary of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator (in millions):
Net income available to common stockholders	$ 33.1	$ 28.7
Denominator (in thousands):
Weighted average common shares outstanding	24,529	24,437
Dilutive effect of stock options and awards	213	157
Denominator for diluted earnings per share	24,742	24,594
Net income per share, basic:	$ 1.35	$ 1.17
Net income per share, diluted:	$ 1.34	$ 1.17

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

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+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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+ Details

Goodwill - Summary of Goodwill (Detail) $ in Millions	3 Months Ended
Goodwill - Summary of Goodwill (Detail) $ in Millions	Mar. 31, 2020 USD ($)
Goodwill [Line Items]
Gross cost, beginning balance	$ 599.5
Accumulated impairment losses, beginning balance	(236.5)
Net book amount, beginning balance	363.0
Exchange effect	(1.8)
Exchange effect	0.0
Gross cost, ending balance	597.7
Accumulated impairment losses, ending balance	(236.5)
Net book amount, ending balance	$ 361.2

Other Intangible Assets - Summary of Other Intangible Assets (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Gross cost at January 1	$ 294.8
Exchange effect	(0.9)
Gross cost at March 31	293.9
Accumulated amortization at January 1	(181.3)
Amortization expense	(5.8)	$ (5.7)
Exchange effect	0.3
Accumulated amortization at March 31	(186.8)
Net book amount at March 31	$ 107.1		$ 113.5

Other Intangible Assets - Schedule of Amortization Expense (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross cost at January 1	$ 293.9	$ 294.8
Other Intangible Assets, Net	107.1	113.5
Product Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross cost at January 1	9.1	10.1
Brand Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross cost at January 1	2.7	2.9
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross cost at January 1	31.7	32.6
Customer and Distributor Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross cost at January 1	57.7	60.8
Internally Developed Software [Member]
Finite-Lived Intangible Assets [Line Items]
Gross cost at January 1	$ 5.9	$ 7.1

Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 5.8	$ 5.7

Pension and Post-Employment Benefits - Additional Information (Detail) - Selling, General and Administrative Expenses [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
United Kingdom Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost, total	$ 0.3	$ 0.2
Germany [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost, total	0.0	$ 0.0
Europe [Member]
Defined Benefit Plan Disclosure [Line Items]
Post-employment obligations European businesses	$ 4.5		$ 4.5

Pension and Post-Employment Benefits - Plan Net Pension Credit (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
United Kingdom Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost on projected benefit obligation	$ (2.8)	$ (3.9)
Expected return on plan assets	4.5	5.6
Amortization of prior service credit	0.2	0.2
Amortization of actuarial net losses	(0.2)	0.0
Net pension credit total	1.7	1.9
GERMANY
Defined Benefit Plan Disclosure [Line Items]
Interest cost on projected benefit obligation	(0.0)	(0.1)
Amortization of actuarial net losses	(0.2)	(0.1)
Net pension credit total	$ (0.2)	$ (0.2)

Income Taxes - Roll-forward of Unrecognized Tax Benefits and Associated Accrued Interest and Penalties (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Income Tax Contingency [Line Items]
Opening balance at January 1	$ 16.4
Additions for tax positions of prior periods	0.0
Closing balance at 31 December	16.4
Current	0.0
Non-current	16.4	$ 16.4
Interest and Penalties [Member]
Income Tax Contingency [Line Items]
Opening balance at January 1	2.0
Additions for tax positions of prior periods	0.0
Closing balance at 31 December	2.0
Current	0.0
Non-current	2.0
Unrecognized Tax Benefits [Member]
Income Tax Contingency [Line Items]
Opening balance at January 1	14.4
Additions for tax positions of prior periods	0.0
Closing balance at 31 December	14.4
Current	0.0
Non-current	$ 14.4

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2018	Dec. 31, 2019
Income Tax Contingency [Line Items]
Unrecognized tax benefits would impact effective tax rate if recognized	$ 16.4
Unrecognized tax benefit	16.4		$ 16.4
Income tax interest expense	0.2
Uncertain tax positions	$ 0.0
Income tax examination, description	The Company and its U.S. subsidiaries remain open to examination by the IRS for years 2016 onwards under the statute of limitations. The Company’s subsidiaries in foreign tax jurisdictions are open to examination including Germany (2015 onwards), Switzerland (2015 onwards), Spain (2016 onwards), France (2017 onwards) and the United Kingdom (2018 onwards).
Increase to income tax expense	$ 0.2
Italian Tax Authorities [Member]
Income Tax Contingency [Line Items]
Unrecognized tax benefit	$ 3.1
Tax Cuts and Jobs Act [Member]
Income Tax Contingency [Line Items]
Uncertain tax positions		$ 10.8
Non-US [Member] \| Earliest Tax Year [Member]
Income Tax Contingency [Line Items]
Open tax year	2011
Non-US [Member] \| Latest Tax Year [Member]
Income Tax Contingency [Line Items]
Open tax year	2014

Long-Term Debt - Schedule of Long-Term Debt (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Deferred finance costs	$ (1.3)	$ (1.4)
Long-term debt	58.7	58.6
Less current portion	(0.0)	(0.0)
Long-term debt, net of current portion	58.7	58.6
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term debt	$ 60.0	$ 60.0

Plant Closure Provisions - Movements in Plant Closure and Restructuring Provisions (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Restructuring and Related Activities [Abstract]
Beginning Balance	$ 49.3
Charge for the period	1.1
Utilized in the period	(1.0)
Exchange effect	(0.1)
Ending Balance	49.3
Due within one year	(5.6)	$ (5.6)
Due after one year	$ 43.7	$ 43.7

Plant Closure Provisions - Additional Information (Detail) - Remediation [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Restructuring Cost and Reserve [Line Items]
Accretion expense recognized	$ 1.1
Remediation charge for changes in the scope and cost of future remediation activities		$ 1.0

Fair Value Measurements - Carrying Amount and Fair Values of the Company's Assets and Liabilities Measured on a Recurring Basis (Detail) - Recurring [Member] - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Carrying Amount [Member]
Non-derivatives:
Cash and cash equivalents	$ 68.1	$ 75.7
Non-derivatives:
Long-term debt (including current portion)	58.7	58.6
Finance leases (including current portion)	1.2	1.5
Carrying Amount [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Foreign Currency Forward Exchange Contracts [Member]
Derivatives (Level 1 measurement):
Foreign currency forward exchange contracts	0.0	0.8
Derivatives (Level 1 measurement):
Foreign currency forward exchange contracts	1.3	0.0
Carrying Amount [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Non-financial liabilities (Level 3 measurement):
Stock equivalent units	12.0	24.6
Fair Value [Member]
Non-derivatives:
Cash and cash equivalents	68.1	75.7
Non-derivatives:
Long-term debt (including current portion)	58.7	58.6
Finance leases (including current portion)	1.2	1.5
Fair Value [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Foreign Currency Forward Exchange Contracts [Member]
Derivatives (Level 1 measurement):
Foreign currency forward exchange contracts	0.0	0.8
Derivatives (Level 1 measurement):
Foreign currency forward exchange contracts	1.3	0.0
Fair Value [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Non-financial liabilities (Level 3 measurement):
Stock equivalent units	$ 12.0	$ 24.6

Derivative Instruments and Risk Management - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Not Designated as Hedging Instrument [Member] \| Foreign Currency Forward Exchange Contracts [Member] \| Other net income/(expense) [Member]
Derivative [Line Items]
Amount of gain/(loss) recognized in income	$ 1.9	$ 0.2
Designated as Hedging Instrument [Member] \| Interest Rate Swaps [Member] \| Accumulated Other Comprehensive Loss [Member]
Derivative [Line Items]
Amount of gain/(loss) recognized in income		$ (0.7)

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Other Commitments [Line Items]
Guarantees	$ 4.6	$ 4.7
Minimum [Member]
Other Commitments [Line Items]
Fixed maturity guarantee remaining term	1 month
Maximum [Member]
Other Commitments [Line Items]
Fixed maturity guarantee remaining term	4 years

Stock-Based Compensation Plans - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option compensation	$ 1.2	$ 1.6
Stock Options Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number exercisable and fully vested	49,444
Fully vested stock options with performance conditions attached	12,519
Stock option compensation	$ 1.2	1.6
Total intrinsic value exercised	4.2	2.1
Total compensation cost related to non-vested stock options not yet recognized	$ 11.9
Expected compensation cost recognized over the weighted-average period	2 years 1 month 9 days
Stock Equivalent Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fully vested stock options with performance conditions attached	56,664
Total intrinsic value exercised	$ 5.6	6.2
Expected compensation cost recognized over the weighted-average period	2 years 4 months 20 days
Number of exercisable SEUs	63,196
Compensation cost	$ 6.0	$ 7.5

Stock-Based Compensation Plans - Summary of Transactions of the Company's Stock Option Plans (Detail) - Stock Options Plan [Member]	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, Number of Options, Beginning balance \| shares	504,459
Exercised, Number of Options \| shares	(74,074)
Forfeited, Number of Options \| shares	(10,250)
Outstanding, Number of Options, Ending balance \| shares	492,232
Outstanding, Weighted Average Exercise Price, Beginning balance	$ 33.05
Exercised, Weighted Average Exercise Price	9.11
Forfeited, Weighted Average Exercise Price	13.80
Outstanding, Weighted Average Exercise Price, Ending balance	34.24
Outstanding, Weighted Average Grant-Date Fair Value	41.35
Exercised, Weighted Average Grant-Date Fair Value	52.83
Forfeited, Weighted Average Grant-Date Fair Value	47.17
Outstanding, Weighted Average Grant-Date Fair Value	$ 43.59
Discount [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Number of Options \| shares	61,678
Granted, Weighted Average Exercise Price	$ 0.00
Granted, Weighted Average Grant-Date Fair Value	$ 77.83
Market Value [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Number of Options \| shares	10,419
Granted, Weighted Average Exercise Price	$ 95.70
Granted, Weighted Average Grant-Date Fair Value	$ 18.69

Stock-Based Compensation Plans - Summarizes Transactions of SEUs (Detail) - Stock Equivalent Units [Member]	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, Number of SEUs, Beginning balance \| shares	390,816
Granted at discount, Number of SEUs \| shares	103,607
Granted at market value, Number of SEUs \| shares	3,634
Exercised, Number of SEUs \| shares	(81,557)
Forfeited, Number of SEUs \| shares	(9,536)
Outstanding, Number of SEUs, Ending balance \| shares	406,964
Outstanding, Weighted Average Exercise Price, Beginning balance	$ 3.69
Granted at discount, Weighted Average Exercise Price	0.00
Granted at market value, Weighted Average Exercise Price	95.70
Exercised, Weighted Average Exercise Price	0.94
Forfeited, Weighted Average Exercise Price	1.53
Outstanding, Weighted Average Exercise Price, Ending balance	4.17
Outstanding, Weighted Average Grant-Date Fair Value	59.91
Granted at discount, Weighted Average Grant-Date Fair Value	77.33
Granted at market value, Weighted Average Grant-Date Fair Value	18.69
Exercised, Weighted Average Grant-Date Fair Value	60.35
Forfeited, Weighted Average Grant-Date Fair Value	58.85
Outstanding, Weighted Average Grant-Date Fair Value	$ 63.92

Reclassifications out of Accumulated Other Comprehensive Loss - Summary of Reclassifications out of Accumulated Other Comprehensive Loss (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications	$ 0.0
Defined Benefit Pension Plan Items [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications	0.0
Reclassification Out of Accumulated Other Comprehensive Income/(Loss) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	0.0
Income tax expense	(0.0)
Total reclassifications	0.0
Reclassification Out of Accumulated Other Comprehensive Income/(Loss) [Member] \| Defined Benefit Pension Plan Items [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of prior service credit	(0.2)
Amortization of actuarial net losses	$ 0.2

Reclassifications out of Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 918.5
Other comprehensive income before reclassifications	(7.9)
Amounts reclassified from AOCL	(0.0)
Total other comprehensive loss	(7.9)	$ (5.7)
Ending Balance	943.8
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(74.4)
Ending Balance	(82.3)
Defined Benefit Pension Plan Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(9.3)
Other comprehensive income before reclassifications	0.0
Amounts reclassified from AOCL	(0.0)
Total other comprehensive loss	0.0
Ending Balance	(9.3)
Foreign Currency Translation Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(65.1)
Other comprehensive income before reclassifications	(7.9)
Amounts reclassified from AOCL	(0.0)
Total other comprehensive loss	(7.9)
Ending Balance	$ (73.0)

Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Smith, Gambrell & Russell, LLP [Member]
Related Party Transaction [Line Items]
Fees payable to Smith, Gambrell & Russell	$ 0.1	$ 0.2
Amount due to related party	0.0		$ 0.0
European Metal Recycling Limited [Member]
Related Party Transaction [Line Items]
Amount due to related party	0.1		$ 0.0
Tendering process to select best buyer of scrap metal	0.1	$ 0.3
Advan Six [Member]
Related Party Transaction [Line Items]
Amount due to related party	0.0
Tendering process to select best buyer of scrap metal	$ 0.1