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Other Intangible Assets (Details Textual) (USD $) In Millions, unless otherwise specified | 12 Months Ended |  |  |  | 12 Months Ended |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 24, 2012 | Dec. 31, 2012 Strata Control Services Inc [Member] | Dec. 24, 2012 Strata Control Services Inc [Member] | Dec. 31, 2012 Ethyl [Member] | Dec. 31, 2011 Ethyl [Member] | Dec. 31, 2008 Ethyl [Member] | Jun. 30, 2007 Ethyl [Member] | Dec. 31, 2012 Technology [Member] | Dec. 31, 2011 Technology [Member] | Dec. 31, 2012 Customer relationships [Member] | Dec. 31, 2011 Customer relationships [Member] | Dec. 31, 2012 Patents [Member] | Dec. 31, 2011 Patents [Member] | Dec. 31, 2012 Internally Developed Software and Other Costs [Member] | Dec. 31, 2011 Internally Developed Software and Other Costs [Member] | Dec. 31, 2012 Innospec Fuel Specialties LLC [Member] | Dec. 31, 2012 Innospec Fuel Specialties LLC [Member] Technology [Member] | Dec. 31, 2012 Innospec Widnes Limited [Member]
Intangible Assets (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible asset | $ 106.2 | $ 51.2 |  |  |  |  | $ 22.1 | $ 22.1 |  | $ 28.4 | $ 7.1 | $ 7.1 | $ 16.0 | $ 16.0 | $ 2.9 | $ 2.9 | $ 10.1 | $ 3.1 |  |  |
Contract provisions offset against intangible assets |  |  |  |  |  |  |  |  | 6.3 |  |  |  |  |  |  |  |  |  |  |  |
Assets being amortized duration | 10 years |  |  |  |  |  |  |  |  |  | 10 years |  | 13 years |  | 10 years |  |  |  |  |  |
Amortization expense | 4.1 | 4.4 | 4.7 |  |  |  | 1.6 | 1.9 |  |  | 0.7 | 0.7 | 1.5 | 1.5 | 0.3 | 0.3 | 0 | 0 |  |  |
Percentage of voting equity interest acquired |  |  |  | 100.00% |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocation of purchase price to other intangible assets | 48.0 |  |  |  | 48.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average expected life | 13 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percent of remaining interest of entity |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |
Anticipated residual value |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  |  |  |  |  |  |  |
Intangible assets, recognized | 7.1 |  |  |  |  |  |  |  |  |  | 4.8 |  | 4.2 |  |  |  |  |  | 9.0 | 2.3 | 2.8
Cost of goods, amortization | 2.6 | 2.9 | 3.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Future amortization expense for 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.0 |  |  |  |
Future amortization expense for 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.5 |  |  |  |
Future amortization expense for 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 9.5 |  |  |  |

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- Definition Finite lived intangible assets expected residual value. + References No definition available. + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(2) -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 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 + Details
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- Definition Percentage of voting equity interests acquired in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7659399&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -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. + Details
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- Definition The amount of expense recognized in the current period that reflects the allocation of the costs of intangible assets over the expected benefit period of such assets. This element applies only to intangible assets used in the production of goods. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -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 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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- Definition Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for 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)(3) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 + Details
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- 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=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -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
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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