XML 17 R46.htm IDEA: XBRL DOCUMENT v2.4.1.9

Other Intangible Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Intangible asset	$ 250.2us-gaap_FiniteLivedIntangibleAssetsGross	$ 247.6us-gaap_FiniteLivedIntangibleAssetsGross	$ 177.0us-gaap_FiniteLivedIntangibleAssetsGross	$ 175.5us-gaap_FiniteLivedIntangibleAssetsGross
Internally Developed Software [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset	$ 30.5us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = iosp_InternallyDevelopedSoftwareAndOtherCostsMember		$ 20.1us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = iosp_InternallyDevelopedSoftwareAndOtherCostsMember

X

- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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