XML 63 R53.htm IDEA: XBRL DOCUMENT v2.4.1.9

Segmental Reporting and Geographical Area Data - Segment Reporting (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Net sales	$ 960.9us-gaap_SalesRevenueNet	$ 818.8us-gaap_SalesRevenueNet	$ 776.4us-gaap_SalesRevenueNet
Gross profit	302.0us-gaap_GrossProfit	255.2us-gaap_GrossProfit	236.4us-gaap_GrossProfit
Operating income	112.5us-gaap_OperatingIncomeLoss	90.6us-gaap_OperatingIncomeLoss	96.5us-gaap_OperatingIncomeLoss
Identifiable assets at year end	999.9us-gaap_Assets	794.7us-gaap_Assets	579.4us-gaap_Assets
Fair value of contingent consideration	1.9us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	0us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	0us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
Impairment of Octane Additives segment goodwill	0us-gaap_GoodwillImpairmentLoss	(1.3)us-gaap_GoodwillImpairmentLoss	(1.2)us-gaap_GoodwillImpairmentLoss
Fuel Specialties [Member]
Segment Reporting Information [Line Items]
Identifiable assets at year end	676.9us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = iosp_FuelSpecialtiesMember	446.4us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = iosp_FuelSpecialtiesMember	356.6us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = iosp_FuelSpecialtiesMember
Impairment of Octane Additives segment goodwill	0us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = iosp_FuelSpecialtiesMember	0us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = iosp_FuelSpecialtiesMember
Performance Chemicals [Member]
Segment Reporting Information [Line Items]
Identifiable assets at year end	181.0us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = iosp_PerformanceChemicalsMember	176.8us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = iosp_PerformanceChemicalsMember	113.4us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = iosp_PerformanceChemicalsMember
Impairment of Octane Additives segment goodwill	0us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = iosp_PerformanceChemicalsMember	0us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = iosp_PerformanceChemicalsMember
Octane Additives [Member]
Segment Reporting Information [Line Items]
Identifiable assets at year end	29.2us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = iosp_OctaneAdditivesMember	42.0us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = iosp_OctaneAdditivesMember	48.9us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = iosp_OctaneAdditivesMember
Impairment of Octane Additives segment goodwill	0us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = iosp_OctaneAdditivesMember	(1.3)us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = iosp_OctaneAdditivesMember
Operating Segments [Member] | Fuel Specialties [Member]
Segment Reporting Information [Line Items]
Net sales	682.2us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_FuelSpecialtiesMember	567.4us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_FuelSpecialtiesMember	527.2us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_FuelSpecialtiesMember
Gross profit	219.0us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_FuelSpecialtiesMember	181.1us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_FuelSpecialtiesMember	158.7us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_FuelSpecialtiesMember
Operating income	104.4us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_FuelSpecialtiesMember	92.7us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_FuelSpecialtiesMember	87.6us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_FuelSpecialtiesMember
Operating Segments [Member] | Performance Chemicals [Member]
Segment Reporting Information [Line Items]
Net sales	223.5us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_PerformanceChemicalsMember	192.4us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_PerformanceChemicalsMember	179.6us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_PerformanceChemicalsMember
Gross profit	54.4us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_PerformanceChemicalsMember	46.3us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_PerformanceChemicalsMember	43.8us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_PerformanceChemicalsMember
Operating income	25.6us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_PerformanceChemicalsMember	23.6us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_PerformanceChemicalsMember	24.3us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_PerformanceChemicalsMember
Operating Segments [Member] | Octane Additives [Member]
Segment Reporting Information [Line Items]
Net sales	55.2us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_OctaneAdditivesMember	59.0us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_OctaneAdditivesMember	69.6us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_OctaneAdditivesMember
Gross profit	28.6us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_OctaneAdditivesMember	27.8us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_OctaneAdditivesMember	33.9us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_OctaneAdditivesMember
Operating income	22.6us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_OctaneAdditivesMember	21.5us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_OctaneAdditivesMember	26.0us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = iosp_OctaneAdditivesMember
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Pension credit/(charge)	(3.3)us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember	(2.3)us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember	(1.6)us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember
Fair value of contingent consideration	1.9us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember	0us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember	0us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember
Impairment of Octane Additives segment goodwill	0us-gaap_GoodwillImpairmentLoss / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember	(1.3)us-gaap_GoodwillImpairmentLoss / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember	(1.2)us-gaap_GoodwillImpairmentLoss / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Identifiable assets at year end	112.8us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember	129.5us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember	60.5us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember
Corporate costs	$ (38.7)iosp_CorporateCosts / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember	$ (43.6)iosp_CorporateCosts / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember	$ (38.6)iosp_CorporateCosts / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember

X

- Definition

Corporate costs.

+ References

No definition available.

+ Details

Name:	iosp_CorporateCosts
Namespace Prefix:	iosp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.18)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 12

-Article 7



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 18

-Article 5

+ Details

Name:	us-gaap_Assets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 4

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479

+ Details

Name:	us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (j)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (h)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

+ Details

Name:	us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 2

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1,2)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

Name:	us-gaap_GrossProfit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_OperatingIncomeLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

Name:	us-gaap_SalesRevenueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConsolidationItemsAxis=us-gaap_MaterialReconcilingItemsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=iosp_FuelSpecialtiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=iosp_OctaneAdditivesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=iosp_PerformanceChemicalsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: