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Segmental Reporting and Geographical Area Data (Details 1) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Segment reporting on the basis of geographical location |  |  |
Net sales | $ 776.4 | $ 774.4 | $ 683.2
Income before income taxes | 95.2 | 52.6 | 70.7
Long-lived assets at year end | 71.7 | 65.3 | 68.4
Identifiable assets at year end | 579.4 | 568.8 | 549.4
Goodwill [Member] |  |  |
Segment reporting on the basis of geographical location |  |  |
Identifiable assets at year end | 149.0 | 141.5 | 143.6
Impairment of Octane Additives segment goodwill [Member] |  |  |
Segment reporting on the basis of geographical location |  |  |
Net sales | 69.6 | 76.2 | 72.4
Income before income taxes | (1.2) | (2.0) | (2.2)
Identifiable assets at year end | 48.9 | 51.5 | 65.9
United States [Member] |  |  |
Segment reporting on the basis of geographical location |  |  |
Income before income taxes | 5.6 | (42.6) | 11.1
Long-lived assets at year end | 31.5 | 22.0 | 16.7
Identifiable assets at year end | 174.1 | 123.2 | 97.4
United Kingdom [Member] |  |  |
Segment reporting on the basis of geographical location |  |  |
Income before income taxes | 38.2 | 39.0 | 25.5
Long-lived assets at year end | 28.7 | 32.4 | 40.1
Identifiable assets at year end | 192.1 | 253.8 | 255.5
Rest of Europe [Member] |  |  |
Segment reporting on the basis of geographical location |  |  |
Income before income taxes | 52.6 | 58.2 | 36.6
Long-lived assets at year end | 11.5 | 10.9 | 11.6
Identifiable assets at year end | 63.8 | 49.8 | 52.4
Other [Member] |  |  |
Segment reporting on the basis of geographical location |  |  |
Income before income taxes | 0 | 0 | (0.3)
Identifiable assets at year end | 0.4 | 0.5 | 0.5
Sales by source [Member] |  |  |
Segment reporting on the basis of geographical location |  |  |
Net sales | 776.4 | 774.4 | 683.2
Sales by source [Member] | United States [Member] |  |  |
Segment reporting on the basis of geographical location |  |  |
Net sales | 274.1 | 265.6 | 238.4
Sales by source [Member] | United Kingdom [Member] |  |  |
Segment reporting on the basis of geographical location |  |  |
Net sales | 475.1 | 482.8 | 431.8
Sales by source [Member] | Rest of Europe [Member] |  |  |
Segment reporting on the basis of geographical location |  |  |
Net sales | 142.8 | 151.7 | 106.8
Sales by source [Member] | Other [Member] |  |  |
Segment reporting on the basis of geographical location |  |  |
Net sales | 0.5 | 0.9 | 0.7
Sales by source [Member] | Sales between areas [Member] |  |  |
Segment reporting on the basis of geographical location |  |  |
Net sales | (116.1) | (126.6) | (94.5)
Sales by destination [Member] |  |  |
Segment reporting on the basis of geographical location |  |  |
Net sales | 776.4 | 774.4 | 683.2
Sales by destination [Member] | United States [Member] |  |  |
Segment reporting on the basis of geographical location |  |  |
Net sales | 272.4 | 248.2 | 231.4
Sales by destination [Member] | United Kingdom [Member] |  |  |
Segment reporting on the basis of geographical location |  |  |
Net sales | 38.8 | 48.5 | 26.8
Sales by destination [Member] | Rest of Europe [Member] |  |  |
Segment reporting on the basis of geographical location |  |  |
Net sales | 331.0 | 304.2 | 235.1
Sales by destination [Member] | Other [Member] |  |  |
Segment reporting on the basis of geographical location |  |  |
Net sales | $ 134.2 | $ 173.5 | $ 189.9

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- Definition Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 38 -Subparagraph b(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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