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Other Intangible Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended |  |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  |  |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 Brand Names [Member] | Dec. 31, 2012 Brand Names [Member] | Dec. 31, 2013 Technology [Member] | Dec. 31, 2012 Technology [Member] | Dec. 31, 2013 Customer Relationships [Member] | Dec. 31, 2012 Customer Relationships [Member] | Dec. 31, 2013 Customer Lists [Member] | Dec. 31, 2013 Patents [Member] | Dec. 31, 2012 Patents [Member] | Dec. 31, 2013 Internally Developed Software and Other Costs [Member] | Dec. 31, 2012 Internally Developed Software and Other Costs [Member] | Dec. 31, 2013 Internally Developed Software and Other Costs [Member] Selling, General and Administrative Expenses [Member] | Dec. 31, 2012 Internally Developed Software and Other Costs [Member] Selling, General and Administrative Expenses [Member] | Dec. 31, 2013 Non-Compete Agreements [Member] | Dec. 31, 2012 Non-Compete Agreements [Member] | Dec. 31, 2013 Non-Compete Agreements [Member] Selling, General and Administrative Expenses [Member] | Dec. 31, 2012 Non-Compete Agreements [Member] Selling, General and Administrative Expenses [Member] | Dec. 31, 2013 Marketing Related [Member] | Dec. 31, 2012 Marketing Related [Member] | Dec. 31, 2008 Marketing Related [Member] | Jun. 30, 2007 Marketing Related [Member] | Dec. 31, 2013 Product Rights [Member] | Dec. 31, 2012 Product Rights [Member] | Dec. 31, 2013 Innospec Fuel Specialties LLC [Member] | Dec. 31, 2013 Innospec Fuel Specialties LLC [Member] Technology [Member] | Dec. 31, 2013 Innospec Widnes Limited [Member] | Dec. 31, 2013 Innospec Widnes Limited [Member] Technology [Member] | Dec. 31, 2013 Bachman [Member] Brand Names [Member] | Dec. 31, 2012 Bachman [Member] Brand Names [Member] | Nov. 04, 2013 Bachman [Member] Brand Names [Member] | Dec. 31, 2013 Bachman [Member] Technology [Member] | Nov. 04, 2013 Bachman [Member] Technology [Member] | Dec. 31, 2013 Bachman [Member] Customer Relationships [Member] | Nov. 04, 2013 Bachman [Member] Customer Relationships [Member] | Dec. 31, 2013 Strata [Member] Technology [Member] | Dec. 31, 2013 Strata [Member] Customer Relationships [Member] | Dec. 31, 2013 Finetex [Member] | Dec. 31, 2013 Finetex [Member] Patents [Member] | Dec. 31, 2013 Chemsil [Member] Product Rights [Member] | Dec. 31, 2012 Chemsil [Member] Product Rights [Member] | Aug. 30, 2013 Chemsil [Member] Product Rights [Member]
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocation of purchase price to other intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2.9 |  | $ 8.5 |  | $ 14.5 |  |  |  |  |  |  | $ 34.0
Assets being amortized duration | 10 years |  |  |  |  |  |  |  |  | 13 years | 10 years |  | 5 years |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  | 10 years |  | 10 years | 5 years |  |  | 15 years |  | 14 years 6 months |  | 16 years 6 months | 11 years 6 months |  |  | 9 years |  |
Amortization expense | 11.1 | 4.1 | 4.4 |  |  | 1.9 | 0.7 | 4.1 | 1.5 |  | 0.3 | 0.3 |  |  | 1.0 | 0 |  |  | 0.7 | 0 | 1.7 | 1.6 |  |  |  |  |  |  |  |  | 0.1 | 0 |  |  |  |  |  |  |  |  |  | 1.3 | 0 |
Date of acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Jul. 08, 2004 |  |  | Nov. 04, 2013 |  |  | Nov. 04, 2013 |  | Nov. 04, 2013 |  | Dec. 24, 2012 | Nov. 04, 2013 |  |  | Aug. 30, 2013 |  |
Residual value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  | 0 |  | 0 |  |  |  |  |  | 0 |  |
Intangible assets, recognized |  |  |  |  |  |  |  |  |  | 4.2 |  |  |  |  |  |  | 1.5 |  |  |  |  |  |  |  |  |  | 9.0 | 2.3 | 2.8 | 4.8 |  |  |  |  |  |  |  | 18.3 | 28.2 | 7.1 |  |  |  |
Percent of remaining interest of entity acquired |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible asset | 175.5 | 106.2 |  | 2.9 | 0 | 33.9 | 25.4 | 58.7 | 44.2 |  | 2.9 | 2.9 | 19.5 | 10.1 |  |  | 1.5 | 1.5 |  |  | 22.1 | 22.1 |  | 28.4 | 34.0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.9 |  |  |
Contract provisions offset against intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost of goods, amortization | $ 3.8 | $ 2.6 | $ 2.9 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Percent Of Remaining Interest Of Entity Acquired + References No definition available. + Details
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- Definition The aggregate expected value at the end of their useful life of a major finite-lived intangible asset class acquired during the period either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + 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 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 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: 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=26713463&loc=d3e16323-109275 + Details
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- Definition Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e845-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Acquisition Date -URI http://asc.fasb.org/extlink&oid=6919109 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e848-128460 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + 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 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 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination. + References No definition available. + 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=26713463&loc=d3e16323-109275 + 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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