XML 44 R4.htm IDEA: XBRL DOCUMENT v2.4.0.6

Consolidated Statements Of Comprehensive Income/(Loss) (Parenthetical) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Consolidated Statements Of Comprehensive Income/(Loss) [Abstract]
Changes in unrealized gains/(losses) on derivative instruments, tax	$ 0.3	$ 0	$ (0.9)
Amortization of actuarial net losses, tax	(0.1)	(1.4)	0
Gain on pension plan amendment, tax	0	(4.8)	0
Amortization of prior service credit, tax	0.4	0.3	0
Actuarial net gains (losses), tax	(6.6)	(26.6)	35.0
Unrecognized actuarial net losses	78.1	94.3	179.4
Unrecognized actuarial net losses, tax	$ 26.0	$ 34.9	$ 69.7

X

- Definition

Tax effect on the total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

+ References

No definition available.

+ Details

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

X

- Definition

Tax effect of net increase or decrease of changes in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan.

+ References

No definition available.

+ Details

Name:	iosp_DefinedBenefitPlanActuarialNetGainsLossesTax
Namespace Prefix:	iosp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 220



-SubTopic 10



-Section 45



-Paragraph 11



-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e637-108580







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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 220



-SubTopic 10



-Section 45



-Paragraph 14



-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e681-108580







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



-Publisher FASB



-Name Statement of Financial Accounting Standard (FAS)



-Number 130



-Paragraph 26



-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.







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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 220



-SubTopic 10



-Section 45



-Paragraph 13



-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e653-108580







Reference 5: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Statement of Financial Accounting Standard (FAS)



-Number 132R



-Paragraph 5



-Subparagraph i



-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.







Reference 6: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Statement of Financial Accounting Standard (FAS)



-Number 158



-Paragraph 7



-Subparagraph c



-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.







Reference 7: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 715



-SubTopic 20



-Section 50



-Paragraph 1



-Subparagraph (i)



-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

+ Details

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

X

- Definition

Tax effect on adjustment out of other comprehensive income for prior service costs recognized as a component of net period benefit cost during the period.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 220



-SubTopic 10



-Section 45



-Paragraph 12



-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e640-108580







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



-Publisher AICPA



-Name Accounting Research Bulletin (ARB)



-Number 51



-Paragraph 38



-Subparagraph c(3)



-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.







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



-Publisher FASB



-Name Statement of Financial Accounting Standard (FAS)



-Number 158



-Paragraph 7



-Subparagraph a



-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.







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



-Publisher FASB



-Name Statement of Financial Accounting Standard (FAS)



-Number 130



-Paragraph 25



-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.







Reference 5: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Statement of Financial Accounting Standard (FAS)



-Number 87



-Paragraph 25



-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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

X

- Definition

Tax effect of plan amendments during the period. The expense (benefit) has not been recognized in net periodic benefit cost.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 220



-SubTopic 10



-Section 45



-Paragraph 12



-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e640-108580

+ Details

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

X

- Definition

For each annual statement of income presented, the tax effect of the net gain (loss) recognized in other comprehensive income that is a reclassification adjustment of other comprehensive income as a result of being recognized as a component of net periodic benefit cost for the period.

+ References

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



-Publisher AICPA



-Name Accounting Research Bulletin (ARB)



-Number 51



-Paragraph 38



-Subparagraph c(3)



-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.







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



-Publisher FASB



-Name Statement of Financial Accounting Standard (FAS)



-Number 158



-Paragraph 7



-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.







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



-Publisher FASB



-Name Statement of Financial Accounting Standard (FAS)



-Number 130



-Paragraph 25



-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.







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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 220



-SubTopic 10



-Section 45



-Paragraph 12



-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e640-108580

+ Details

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

X

- Definition

Tax effect on the change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

+ References

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



-Publisher FASB



-Name Statement of Financial Accounting Standard (FAS)



-Number 130



-Paragraph 25



-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.







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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 220



-SubTopic 10



-Section 45



-Paragraph 12



-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e640-108580







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



-Publisher AICPA



-Name Accounting Research Bulletin (ARB)



-Number 51



-Paragraph 38



-Subparagraph c(3)



-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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

X

- Details

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