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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2013
Income Tax Disclosure [Abstract] |
Roll-Forward of Unrecognized Tax Benefits and Associated Accrued Interest and Penalties | A roll-forward of unrecognized tax benefits and associated accrued interest and penalties is as follows:
(in millions) |  | Interest and Penalties |  |  | Unrecognized Tax Benefits |  |  | Total |
Opening balance at January 1, 2011 |  | $ | 0.3 |  |  | $ | 8.3 |  |  | $ | 8.6 |
Additions related to tax positions taken in the current period |  |  | 0.0 |  |  |  | 5.2 |  |  |  | 5.2 |
Additions for tax positions of prior periods |  |  | 0.2 |  |  |  | 0.5 |  |  |  | 0.7 |
Reductions for tax positions of prior periods |  |  | (0.1 | ) |  |  | (1.8 | ) |  |  | (1.9 | )
Closing balance at December 31, 2011 |  |  | 0.4 |  |  |  | 12.2 |  |  |  | 12.6 |
Current |  |  | (0.3 | ) |  |  | (2.9 | ) |  |  | (3.2 | )
Non-current |  | $ | 0.1 |  |  | $ | 9.3 |  |  | $ | 9.4 |
Opening balance at January 1, 2012 |  | $ | 0.4 |  |  | $ | 12.2 |  |  | $ | 12.6 |
Additions related to tax positions taken in the current period |  |  | 0.0 |  |  |  | 0.2 |  |  |  | 0.2 |
Additions for tax positions of prior periods |  |  | 0.2 |  |  |  | 0.0 |  |  |  | 0.2 |
Reductions due to lapsed statutes of limitations |  |  | 0.0 |  |  |  | (0.2 | ) |  |  | (0.2 | )
Closing balance at December 31, 2012 |  |  | 0.6 |  |  |  | 12.2 |  |  |  | 12.8 |
Current |  |  | (0.3 | ) |  |  | (2.7 | ) |  |  | (3.0 | )
Non-current |  | $ | 0.3 |  |  | $ | 9.5 |  |  | $ | 9.8 |
Opening balance at January 1, 2013 |  | $ | 0.6 |  |  | $ | 12.2 |  |  | $ | 12.8 |
Additions for tax positions of prior periods |  |  | 0.6 |  |  |  | 0.2 |  |  |  | 0.8 |
Reductions due to lapsed statutes of limitations |  |  | (0.1 | ) |  |  | (0.5 | ) |  |  | (0.6 | )
Closing balance at December 31, 2013 |  |  | 1.1 |  |  |  | 11.9 |  |  |  | 13.0 |
Current |  |  | (0.6 | ) |  |  | (6.2 | ) |  |  | (6.8 | )
Non-current |  | $ | 0.5 |  |  | $ | 5.7 |  |  | $ | 6.2 |
Sources of Income Before Income Taxes | The sources of income before income taxes were as follows:
(in millions) |  | 2013 |  |  | 2012 |  |  | 2011 |
Domestic |  | $ | 10.0 |  |  | $ | 5.6 |  |  | $ | (42.6 | )
Foreign |  |  | 82.8 |  |  |  | 87.7 |  |  |  | 92.8 |
|  | $ | 92.8 |  |  | $ | 93.3 |  |  | $ | 50.2 |
Components of Income Tax Charges | The components of income tax charges are summarized as follows:
(in millions) |  | 2013 |  |  | 2012 |  |  | 2011 |
Current: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 1.6 |  |  | $ | 2.9 |  |  | $ | 5.4 |
Foreign |  |  | 6.8 |  |  |  | 11.8 |  |  |  | 13.6 |
|  |  | 8.4 |  |  |  | 14.7 |  |  |  | 19.0 |
Deferred: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | 1.8 |  |  |  | 12.3 |  |  |  | (12.8 | )
Foreign |  |  | 4.8 |  |  |  | (0.6 | ) |  |  | (3.1 | )
|  |  | 6.6 |  |  |  | 11.7 |  |  |  | (15.9 | )
|  | $ | 15.0 |  |  | $ | 26.4 |  |  | $ | 3.1 |
Factors Effecting Effective Tax Rate from U.S. Federal Statutory Rate | The effective tax rate varies from the U.S. federal statutory rate because of the factors indicated below:
|  | 2013 |  |  | 2012 |  |  | 2011 |
Statutory rate |  |  | 35.0 | % |  |  | 35.0 | % |  |  | 35.0 | %
Foreign income inclusions |  |  | 6.1 |  |  |  | 48.9 |  |  |  | 20.5 |
Impairment of Octane Additives segment goodwill |  |  | 0.5 |  |  |  | 0.5 |  |  |  | 1.3 |
Foreign tax credits |  |  | (1.9 | ) |  |  | (38.3 | ) |  |  | (25.8 | )
Pension (credit)/charge |  |  | (0.3 | ) |  |  | (0.3 | ) |  |  | (9.7 | )
Foreign tax rate differential |  |  | (14.6 | ) |  |  | (16.4 | ) |  |  | (19.1 | )
Permanent tax adjustments |  |  | (2.5 | ) |  |  | (0.2 | ) |  |  | 0.3 |
Amortization |  |  | 1.1 |  |  |  | 0.5 |  |  |  | 0.7 |
Tax (credit)/charge from previous years |  |  | (2.9 | ) |  |  | (0.6 | ) |  |  | (1.9 | )
Net charge/(credit) from unrecognized tax benefits |  |  | 0.2 |  |  |  | 0.3 |  |  |  | 7.7 |
United Kingdom income tax rate reduction |  |  | 0.9 |  |  |  | (0.6 | ) |  |  | (4.8 | )
Other items and adjustments, net |  |  | (5.4 | ) |  |  | (0.5 | ) |  |  | 2.0 |
|  |  | 16.2 | % |  |  | 28.3 | % |  |  | 6.2 | %
Details of Deferred Tax Assets and Liabilities | Details of deferred tax assets and liabilities are analyzed as follows:
(in millions) |  | 2013 |  |  | 2012 |
Deferred tax assets: |  |  |  |  |  |  |  |
Foreign tax credits |  | $ | 4.5 |  |  | $ | 5.5 |
Accrued expenses |  |  | 3.4 |  |  |  | 4.6 |
Stock options |  |  | 5.2 |  |  |  | 5.5 |
Excess of tax over book basis in property, plant and equipment |  |  | 0.9 |  |  |  | 1.1 |
Net operating loss carry forwards |  |  | 0.3 |  |  |  | 0.3 |
Pension liabilities |  |  | 6.5 |  |  |  | 9.2 |
Other intangible assets |  |  | 1.0 |  |  |  | 0.0 |
Other |  |  | 3.9 |  |  |  | 4.7 |
Valuation allowance |  |  | 0.0 |  |  |  | 0.0 |
Deferred tax liabilities: |  |  |  |  |  |  |  |
Goodwill amortization |  |  | (7.2 | ) |  |  | (6.9 | )
Other intangible assets |  |  | (0.3 | ) |  |  | (0.9 | )
Excess of book over tax basis in tax deductible goodwill |  |  | (0.2 | ) |  |  | 0.0 |
Excess of book over tax basis in intangible assets |  |  | (7.5 | ) |  |  | 0.0 |
Other |  |  | (2.9 | ) |  |  | (3.2 | )
Total net deferred tax asset |  | $ | 7.6 |  |  | $ | 19.9 |
Deferred taxes are included within the consolidated balance sheets as follows: |  |  |  |  |  |  |  |
Deferred tax assets |  | $ | 17.3 |  |  | $ | 23.7 |
Deferred tax liabilities |  |  | (9.7 | ) |  |  | (3.8 | )
|  | $ | 7.6 |  |  | $ | 19.9 |
Current portion of deferred tax assets |  | $ | 8.7 |  |  | $ | 11.0 |
Deferred tax assets, net of current portion |  |  | 8.6 |  |  |  | 12.7 |
Current portion of deferred tax liabilities |  |  | (0.2 | ) |  |  | (0.2 | )
Deferred tax liabilities, net of current portion |  |  | (9.5 | ) |  |  | (3.6 | )
|  | $ | 7.6 |  |  | $ | 19.9 |
Details of Deferred Tax Asset Valuation Allowance | Details of the deferred tax asset valuation allowance are as follows:
(in millions) |  | 2013 |  |  | 2012 |  |  | 2011 |
At January 1 |  | $ | 0.0 |  |  | $ | (7.5 | ) |  | $ | (10.8 | )
Change in foreign tax credits |  |  | 0.0 |  |  |  | 7.5 |  |  |  | 3.3 |
At December 31 |  | $ | 0.0 |  |  | $ | 0.0 |  |  | $ | (7.5 | )

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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- Definition Tabular disclosure of the change in unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 55 -Paragraph 217 -URI http://asc.fasb.org/extlink&oid=32707879&loc=d3e36027-109320 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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